Associate CET 6th guide

You should expect the video amplifier in a radar or TV receiver to have a frequency response of: a. 20 Hz - 20 kHz b. 20 kHz - 180 kHz c. 0 - 6 Mhz d. 88 Mhz - 108 Mhz

c. 0 - 6 Mhz

How do calculate the gain of a non-inverting op-amp? a. input / input b. -output / input c. 1 + Rf / Ri d. 1- Rf / Ri

c. 1 + Rf / Ri

0 dB mV is what level of received TV signal? a. zero b. .0001 volt c. 1000 microvolt d. 1 volt

c. 1000 microvolt

Three capacitors of 470 uf, 560 pf, and .47 pf are in parallel with each other. the total is: a. .47 pf b. 2.13 pf c. 1030.47 pf d. 1.03047 uf

c. 1030.47 pf

What decimal number is represented by the binary number 01101010? a. 6A b. 53 c. 106 d. 152

c. 106

Which of these is within tolerance for a resistor color coded red, black, red, gold. a. 1850 ohms b. 2150 ohms c. 1950 ohms d. 2250 ohms

c. 1950 ohms

Which of the following languages can run directly on the microprocessor? a. assembly language b. interpreted language c. machine language d. compiled language

c. machine language

Which of these terms would you most expect to see when referring to types of resistors? a. electrolytic b. FET c. metal film d. henry

c. metal film

The power transformer in a power supply: a. always step voltage up b. always step voltage down c. might step votlages up or down d. always step current up

c. might step votlages up or down

In a series circuit when the inductive reactances equal the capacitor reactances the circuit has ____ impedance. a. maximum b. double the inductors c. minimum d. no

c. minimum

Which of these is a good indicator of the quality of an analog meter? a. lowest current scale b. highest voltage scale c. ohms-per-volt rating d. number of resistance scales

c. ohms-per-volt rating

Information travels through optic fibers via the flow of: a. protons b. lumens c. photons d. electrons

c. photons

When connecting an analog voltmeter into a DC circuit, what should be observed? a. RMS rating of meter b. loading of meter c. polarity d. peak to peak voltage of circuit

c. polarity

Which of these IC or semiconductor devices normally requires the most careful handling to avoid damage by static electricity? a. TTL b. ECL c. MOV d. CMOS

d. CMOS

the boolean expression Y = /A+B represents ___. a. AND b. NAND c. OR d. NOR

d. NOR

The noise level in a radio receiver is generated mostly in the: a. IF stages b. local oscillator c. audio section d. RF section

d. RF section

Which one of the following in a PC would be part of disk operations? a. serial port board b. DMA ports c. CGA ports d. SATA or IDE controller

d. SATA or IDE controller

B+, or supply voltages in electronics products, is considered to be: a. +5 to +12 VDC b. 0 to 30 V DC c. +12 to 300 V DC d. The anode or plate voltage supply

C. +12 to 300 V DC

On hook DC voltage on a telephone local loop is __________. A. +24 volts B. -8 volts C. -48 volts D. +12 volts

C. -48 volts

The maximum bit rate available on a T-1 transmission system is __________. A. 56 kbps B. 64 kbps C. 1.544 Mbps D. 2.4 Gbps

C. 1.544 Mbps

Adding the binary numbers 110111 and 001100 will give which one of the results below? A. 0000101 B. 0111101 C. 1000011 D. 1111011

C. 1000011

A class AB amplifier will allow output current to flow for approximately __________of the input signal. A. 180⁰ Β. 200⁰ C. 280⁰ D. 360⁰

C. 280⁰

8.33 meters is the full wavelength in the air for what RF frequency? A. 72 MHz B. 83.3 MHz C. 36 MHz D. 16.66

C. 36 MHz

The 1 in binary number 1000000 carries a decimal weight of: A. 32 B. 16 C. 64 D. 128

C. 64

An LCD (liquid crystal display) is: A. An inductive coupling device B. A lithium/cadmium DC source C. A low-current digital display D. A charge-coupled device

C. A low-current digital display

The safest accessory item for a tie is __________. A. A tie tack B. A safety pin C. A tie bar D. None of the above

C. A tie bar

A dual trace oscilloscope differs from a single trace in that only the dual trace scope: A. Has two cathode ray guns B. Has Z input C. Alternates sweeps D. Has intensified traces

C. Alternates sweeps

Logic Pulser can be used as a: A. Logic probe B. Digital tracer C. Digital signal generator D. Filter

C. Digital signal generator

To properly bias a PNP transistor which voltages appear proper? A. E=0; B=+1; C=+10 B. E= 1; B=5; C=+20 C. E=-1; B=-1.7; C=-10 D. E=0; B=0; C=-10

C. E=-1; B=-1.7; C=-10

A category 2 type of electronics equipment could be a __________. A. Consumer home TV B. Heart monitor C. Fax machine D. FM walkman

C. Fax machine

The ripple voltage is higher then the specifications but the frequency is correct. The section causing this problem is the __________. A. Transformer B. Rectifier C. Filter D. Regulator

C. Filter

A short allows for an increase of current and __________. A. Voltage B. Resistance C. Heat D. Trouble

C. Heat

Limited recipients would be identified __________. A. On the first text page B. In the glossary C. In the Distribution list D. On the title page

C. In the Distribution list

One of these would include page numbering the same as the text. Which one? A. Table of contents B. Abstract C. Index D. Illustration list

C. Index

Quarter-wave antennas must be __________ at one end for resonance at the desired frequency. A. Shielded B. Ungrounded C. In free space D. Grounded

D. Grounded

A MOSFET: A. Has low input impedance B. Is also called a bi-polar transistor C. Amplifies input current changes D. Has high input impedance

D. Has high input impedance

A Logic 1, for a CMOS device connected to a 5V supply is __________. A. More than 1 volt B. More than 1.5 volts C. More than 2 volts D. More than 3.5 volts

D. More than 3.5 volts

This section of the DC power supply would provide a steady DC voltage to a system. A. Transformer B. Rectifier C. Filter D. Regulator

D. Regulator

What basic circuit parameter makes it difficult to build integrated circuits with a high number of components to operate at super high frequencies? A. Series resistance B. Parallel inductance C. High impedance D. Shunt capacitance

D. Shunt capacitance

A repair is only as good as __________. A. The test equipment B. The equipment brand C. The part replacement D. The soldering

D. The soldering

Why is RF safety important? A. To ensure maximum power output at all times B. Always assuring variable tuning capability C. Capability to receive distant radio stations D. To limit human exposure to RF for health reasons E. Maintain adequate FCC bandwidth spacing

D. To limit human exposure to RF for health reasons

To remove solder from a joint using copper braid: A. Heat the joint then quickly dip the cold braid into melted solder and remove B. Heat the component leads at the joint first, then the braid C. Wrap the braid around the soldering iron tip and while hot, wipe off solder from the joint D. Touch the joint with the braid - heat it and let the solder wick up the braid

D. Touch the joint with the braid - heat it and let the solder wick up the braid

The Y axis of an oscilloscope is: A. Brightness B. Intensity C. Focus D. Vertical

D. Vertical

The 30-30-30 rule refers to __________. A. Billable hours, scheduled hours and productivity B. Wages, overhead expenses, productivity C. Wages, scheduled hours, overhead expenses D. Wages, overhead expenses, re-investment

D. Wages, overhead expenses, re-investment

A conducting loop in motion through magnetic lines of flux has a current induced in it. The physical law that explains this is what? a. Lenz's Law b. Law of inertia c. Compton shift d. Kirchoff's current law

a. Lenz's Law

Which one of the following integrated circuit or semiconductor devices normally requires the most careful handling to avoid damage by static electricity? a. MOS b. ECL c. MOV d. TTL

a. MOS

Which portion of the microprocessor would perform the addition of two numbers? a. ALU b. bus control c. instruction decoder d. register

a. ALU

The gain of an op-amp is inversely related to band width as input frequency increases. a. Always b. Never

a. Always

ESD and static discharge is most destructive to _______. a. CMOS semiconductors b. TTL semiconductors c. Germanium PN junctions d. Silicon PN junctions

a. CMOS semiconductors

Which layer of the atmosphere absorbs high frequency radio waves during daylight hours? a. D layer b. E layer c. F layer d. F1 layer e. F2 layer

a. D layer

The basic formula for wavelength is: L = wavelength, v=velocity, f= freq. a. L = v/f b. v = L/r c. L = f/v d. L = r/v

a. L = v/f

Of these choices, the display of a DMM would probably be: a. LCD b Pointer c. CRT d. Floating ball

a. LCD

AC power outlet strips with surge suppressors will include at least one a. MOV b. MOS c. circuit breaker d. zener diode

a. MOV

Rules describing the fire or toxicity retardant types of cabling which may be installed in buildings is contained in _________. a. NEC Article 770 b. UL 569B c. TIA/EIA standard 578 d. NEMA code 1316

a. NEC Article 770

Which of these components most commonly compares to the output of a solar cell? a. NiCad battery b. light sensitive diode and capacitor c. alternator d. FET

a. NiCad battery

One area where technicians will still find discrete electronic components is ____. a. RF equipment b. mass produce games c. high density circuit boards d. small portable handheld devices

a. RF equipment

AC motor speed depends on __________. a. The frequency of the voltage applied to it b. The voltage level applied c. The phase of the voltage applied to it d. The power left in the dilithium

a. The frequency of the voltage applied to it

In a series AC circuit with a resistor, inductor and capacitor, each with the same resistance of reactance, a voltmeter measuring each individual voltage drop would find: a. The voltage equal to each other b. The reactance voltage of the capacitor or the inductor would be greater than the resistance voltage measurement c. The resistance voltage would be higher than the voltage across the inductor or the capacitor d. The supply voltage would be measured across the resistor and the voltage across the capacitor and across the inductor would measure 0V

a. The voltage equal to each other

Maximum power transfer occurs when the load impedance is equal to source impedance. a. True b. False

a. True

Series wound AC motors have strong torque from a dead stop. This makes then ideally suited for use in small appliances. a. True b. False

a. True

The rotor in an induction motor is not connected to AC or DC power. a. True b. False

a. True

Ohm's law provides equations relating to: a. Volts, amps, and resistance b. amps, joules, and resistance c. decibels, resistance, voltage d. amps, resistance, joules

a. Volts, amps, and resistance

A differential amplifier whose two input signals are equal, but 180 degrees out of phase, will have a/an _____ output signal a. max b. zero c. indeterminable d. one half

a. max

In a parallel circuit when the inductive reactances equal the capacitor reactances the circuit has ____ impedance. a. maximum b. double the capacitor's c. minimum d. no

a. maximum

Sideband frequencies are produced when a radio carrier frequency is: a. modulated b. transmitted at minimum power level c. fed to splitter d. radiated into space

a. modulated

Second degree skin burns should ____. a. not be treated with ice and bandage pack b. be covered with thick bandages c. be treated with cold water or ice d. be treated by draining blister

a. not be treated with ice and bandage pack

A differential amplifier with two identical in-phase signals on the inputs will have an output: a. of zero b. twice the input, same shape c. one half the input signal

a. of zero

What type of control has the controlled element in either full open or full closed position? a. on/off b. proportional c. integral d. derivative

a. on/off

Integrated Circuit failures often exhibit: a. open or short conditions b. solder leakage c. audible noise d. radiation hazards

a. open or short conditions

What type of circuit has the same voltage drop across each component? a. parallel b. series-parallel c. series d. combination

a. parallel

A current-carrying conductor is placed in a magnetic field perpendicular to the lines of flux. It tends to move in ____ direction to the force of magnetic lines of flux, as determined by Flemings left-hand rule a. perpendicular b. parallel c. opposite d. same

a. perpendicular

Which of the following circuits can be used to recover audio from an IF in a FM receiver? a. phase locked loop b. class A, common-gate JFET amp c. push-pull, class A JFET amp d. Mixer

a. phase locked loop

Voltage is: a. potential difference between two points b. amount of current flow c. quantity of electronics moving in conductors d. opposition to resistance

a. potential difference between two points

A three input NAND has two high inputs and a low input. The output will be: A. High B. Low C. Not enough information to determine D. Can be neither high nor low

A. High

A CLEC is __________. A. A cable TV company B. The incumbent telephone company C. A wireless provider D. Either A or C

D. Either A or C

The device that causes the phase change between mouth and ear audio in a telephone subscriber unit is the __________. A. Hybrid coil B. Delay line C. Hook switch D. Transmitter

A. Hybrid coil

Which wire size is physically largest? A. #8 B. #12 C. #16 D. #24

A. #8

The number 25 in octal is __________ in binary. A. 010101 B. 011001 C. 110111 D. 100101

A. 010101

Adding the binary numbers 101011 and 001110 will give you what result? A. 111001 B. 111111 C. 001010 D. 111011

A. 111001

Dial Tone is composed of these two frequencies __________. A. 350 + 440 Hz B. 440 + 480 Hz C. 480 + 620 Hz D. 440 + 620 Hz

A. 350 + 440 Hz

The DTMF tones for the number 5 on a telephone keypad is __________. A. 770 + 1336 Hz B. 697 + 1209 Hz C. 941 + 1477 Hz D. 852 + 1633 Hz

A. 770 + 1336 Hz

Shock hazards exist especially in a power supply which has __________. A. A full wave bridge rectifier connected directly to the AC power source B. An earth ground reference at its voltage output C. An Isolation transformer at its input D. An aluminum electrolytic filter capacitor

A. A full wave bridge rectifier connected directly to the AC power source

Changing the filter capacitor from 10μF to 50μF would result in: A. A lower ripple voltage B. A lower ripple frequency C. Both A and B

A. A lower ripple voltage

Diodes are marked with a band at the __________ end. A. Cathode B. Anode C. Center D. Base element

A. Cathode

To properly bias a NPN transistor which voltages appear correct for a signal amplifier? A. E=0; B=+.7 C=+10 B. E= 1; B=5; C=+20 C. E=-1; B=-1.7; C=9.3 D. E=0; B=0; C=10

A. E=0; B=+.7 C=+10

Germanium diodes: A. Have 0.3V forward voltage drop B. Are more often used in power supply circuits C. Are more tolerant of heat than silicon diodes D. Have 0.7V forward voltage drop

A. Have 0.3V forward voltage drop

The proper process for soldering two objects together is: A. Heat both surfaces at the same time apply solder B. Heat one surface at a time, assuring full coverage of the melted solder C. Heat the solder until it melts - flow it over the joint surfaces D. Clean any resin or flux off the joint - then apply heat

A. Heat both surfaces at the same time apply solder

A service or repair ticket provides __________. A. Information about the who, what, when, where, why, how, regarding the service call B. Information to the client regarding warranty and payment terms C. information on out of inventory parts D. Information on productivity

A. Information about the who, what, when, where, why, how, regarding the service call

An 'abstract' __________> A. Is a short descriptive paragraph preceding a report B. Describes the information soucres C. includes appendices D. List copyright sources

A. Is a short descriptive paragraph preceding a report

A DC voltmeter multiplier resistor __________. A. Limits the meter movement current its full scale value B. Multiplies the voltage across the meter movement C. Provides an alternate path for current flow D. Reduces the meter resistance for less loading effect

A. Limits the meter movement current its full scale value

A thermocouple has an output in the range of: A. Millivolts B. Microvolts C. Volts D. Nanovolts

A. Millivolts

A voltmeter that converts AC to DC by rectifying the voltage, would be least accurate measuring what type of alternating voltages? A. Pulses only B. Sine waves C. Peak voltages D. Varying DC voltages only

A. Pulses only

What radio receiver section determines the radio's inherent noise level? A. RF B. Mixer C. IF D. Detector

A. RF

Name one safety precaution taken before replacing a transistor. A. Remove power B. Remove transistor C. Short emitter to base to remove discharge voltage D. Put on rubber gloves for isolation

A. Remove power

Movement of any component of the solder connection before the solder has hardened: A. Results in a poor electrical connection B. Results in a poor mechanical connection C. Results in a poor mechanical and electrical connection D. Is OK so long as the solder doesn't migrate away from the joint

A. Results in a poor electrical connection

Zener and varactor diodes are usually __________ biased. A. Reverse, meaning the positive voltage connects to the N material B. Reverse, meaning the negative voltage connects to the N material C. Forward, meaning the negative voltage connects to the N material D. Forward, meaning the positive voltage connects to the N material

A. Reverse, meaning the positive voltage connects to the N material

Total power in a series circuit is determined by the: a. Source voltage times the current b. Total voltage applied to the circuit c. Current flowing through the switch d. Average wattage rating of each resistor

A. Source voltage times the current

A length of coaxial cable, used for computers, radio or television signals, is open at both ends. With an ohm meter, the resistance measured from the center conductor to the shield is 50 ohms. What does this indicate? A. The cable is partially shorted B. The cable is completely open C. That reading is correct for 50 ohm impedance RF cables D. That reading is lower than 72 ohms for video cables

A. The cable is partially shorted

Surface mount components do not require mechanical bonding because: A. The components are so small the solder connection holds them adequately B. Their sockets provide adequate bonding C. Their leads always "hook" onto the opposite side of the PC Board D. Special strength solder is used on SM boards

A. The components are so small the solder connection holds them adequately

A new computer gave a POST disk drive error the first time it was powered up. A new disk drive was installed and the same error was displayed. The hard disk cables were replaced and still the problem persisted. The motherboard was replaced and the system finally operated properly. After a day of operation the error returned. The most likely cause of the problem is __________. A. The power supply B. The disk drive C. The hard drive cables D. The motherboard

A. The power supply

When heated or cooled, a __________ emits a voltage. A. Thermocouple B. Therometer C. Thermostat D. Thermocline

A. Thermocouple

This section of the DC power supply would step-up or step-down the voltage. A. Transformer B. Rectifier C. Filter D. Regulator

A. Transformer

In a generator, a DC voltage applied to the field windings controls the output level. A. True B. False

A. True

A circle is obtained on the scope when: A. Two sine waves that are 90 degrees out of phase fed to the vertical and horizontal inputs B. Two sawtooth waves , in phase, are fed to the vertical and horizontal inputs C. A sine wave and a sawtooth wave are compared on the scope screen D. Two in-phase sine waves are fed to the horizontal and the vertical inputs

A. Two sine waves that are 90 degrees out of phase fed to the vertical and horizontal inputs

Applying positive voltage to the P end of an ordinary germanium diode: A. Will forward bias it B. Will reverse bias it C. Probably will damage it D. Should have no effect on it

A. Will forward bias it

Is the value of a 500 picofarad capacitor and a .5 nanofarad capacitor identical? A. Yes B. No

A. Yes

The ampere, expresses __________. A. Volts/sec increase B. A unit of charge movement per second past a given point C. Coulombs/charge D. An increase in resistance

B. A unit of charge movement per second past a given point

The three Basic logic gates are __________. A. AND, OR, NAND B. AND, OR, NOT C. NAND, NOR, Inverter D. NAND, XOR,NOR

B. AND, OR, NOT

Retrace blanking in an oscilloscope is __________. A. Not used B. Applied to the Z-axis C. Used to blank the vertical retrace D. Applied to the X-axis

B. Applied to the Z-axis

A NiMH battery cell, when charged, has a terminal voltage of: A. 2.1 Volts B. 1.2 Volts C. 5.0 Volts D. 12 Volts

B. 1.2 Volts

The number 12 in decimal is ______________ in binary. A. 1200 B. 1100 C. 1010 D. 1011

B. 1100

A resistor has color stripes yellow, violet, violet, silver. It is: A. 46 MegOhm +/- 10% B. 470 MegOhm +/- 10% C. 37 MegOhm +/- 10% D. 48 kOhm +/- 5%

B. 470 MegOhm +/- 10%

A ripple frequency of twice the AC frequency is normally associated with: A. A half-wave rectifier B. A full wave rectifier

B. A full wave rectifier

A green light usually indicates ___________. A. A logic high B. A logic low C. A TTL logic level D. A CMOS device

B. A logic low

In a transistor, which section is made very thin compared with the other two? A. Emitter B. Base C. Collector D. Each are exactly the same

B. Base

Why is a coupling capacitor used when troubleshooting with signal injection? A. Improve frequency response B. Block DC level present C. Prevent loading of the circuit D. Provide a correct impedance match

B. Block DC level present

Keeping a record for profitability purposes ensures that __________. A. The appropriate taxes may be required B. Client invoices are properly processed C. Follow-up service can be provided D. Non of the above

B. Client invoices are properly processed

Cables of different impedances may be combined for runs. A. True B. False

B. False

In testing a diode, a forward-to-reverse ratio of 10-1 is indicative of a good diode. A. True B. False

B. False

If an RF signal voltage is reduced by 6 dB, it is then: A. 25% less B. Half the original size C. 75% less D. Not the changed in voltage level

B. Half the original size

One of these should be a separate list. Which one? A. Subjects B. Illustrations C. Chronography D. Transmittals

B. Illustrations

How is a fuse installed in a circuit to insure proper operation? A. Parallel to the load B. In series with the load C. In any way possible D. At the ground point

B. In series with the load

A call between area codes is __________. A. Local long distance B. Inter-LATA C. Intra-LATA D. Toll free

B. Inter-LATA

Antenna resonance is the characteristic that permits __________ radiation of the transmitted signal. A. Minimum B. Maximum C. Zero D. Omni-direction

B. Maximum

Notice of government security classification will be shown __________. A. In the title page B. On every page C. In the acknowledgements D. Just on the front cover

B. On every page

Shaded components on the electronics schematics mean: a. Only factory service personnel may change the part b. Only exact replacement parts may be used c. The shading makes for better readability d. High voltage is present on these parts

B. Only exact replacement parts may be used

An inductor in an electrical circuit: A. Causes current to lead voltage B. Opposes the flow of AC current C. Appears capacitive to AC current D. Appears as a short circuit to AC current

B. Opposes the flow of AC current

Oscillators use quartz crystals that generate output by the: A. Phase-shift effect B. Piezoelectric effect C. Doppler effect D. Avalanche (or Zener) effect

B. Piezoelectric effect

What does RAM mean? A. A forced memory data storage procedure B. Random Access Memory C. Real Address Mode D. Regulated Audio Methodology

B. Random Access Memory

The ripple frequency of the output of a full wave rectifier power supply measures the same as the AC input. The section causing this problem is the __________. A. Transformer B. Rectifier C. Filter D. Regulator

B. Rectifier

In the normal layout (block diagram) of a DC power supply the order of the sections would be: A. Filter, Rectifier, Regulator B. Rectifier, Filter, Regulator C. Rectifier, Regulator, Filter D. None of the above

B. Rectifier, Filter, Regulator

A capacitor and a resistor in series would be used to: A. Cut off the peaks in AC signals at a set level B. Reduce or short signals above certain frequencies C. Pass the DC level, while blocking the AC signals D. Filter signals from getting into an amplifier

B. Reduce or short signals above certain frequencies

The zener diode is the most important component in this section. A. Filter B. Regulator C. Both A and B

B. Regulator

Carbon microphones are much like variable: A. Capacitors B. Resistors C. Thermistors D. Inductors

B. Resistors

An inductor shorted turn can be detected reliably using a __________. A. Leakage test B. Ringer test C. AC impedance bridge D. All of the above

B. Ringer test

Which of the below will cause distortion at high audio levels in an amplifier? A. Scratchy tone control B. Rubbing speaker voice coil C. Bias on a transistor D. Bass-boost control On

B. Rubbing speaker voice coil

SMT stands for __________. A. Slow melting temperature B. Surface mount technology C. Sure mounts tough D. Standard metal thickness

B. Surface mount technology

A trunk connects ____________. A. Two telephone lines B. Two central offices C. Two conductors D. Two area codes

B. Two central offices

An AC voltmeter will measure a non-sine wave signal accurately only if __________. A. An extender resistor is used B. It is an average reading meter C. It is a true RMS meter D. The signal crest factor is very high

C. It is a true RMS meter

Waveguides are not utilized at HF of VHF frequencies because: A. Characteristic impedance is too high B. Resistance to high frequencies is too high C. Large waveguide dimensions required at lower frequencies are not practical D. Grounding problems

C. Large waveguide dimensions required at lower frequencies are not practical

Space waves are ideal for what frequency of communications? A. VLF B. HF C. Line-of-sight UHF D. Audible frequencies

C. Line-of-sight UHF

The component used to control the functions of an electronic device most likely would be referred to as: A. RAM B. SCR C. Microprocessor D. Op-amp

C. Microprocessor

A Logic 1, for TTL device is __________. A. More than 1 volt B. More than 1.5 volts C. More than 2 volts D. More than 3.5 volts

C. More than 2 volts

An average-reading AC voltmeter __________. A. Displays the average AC voltage value B. Converts to a peak reading before displaying the voltage C. Multiples the average value by 1.111 before displaying the voltage D. Multiples the average value by 0.636 before displaying the voltage

C. Multiples the average value by 1.111 before displaying the voltage

A BGA chip has __________. A. Thru hole pins B. Leads on the sides C. Solder balls underneath D. Both gates anodized

C. Solder balls underneath

Who knows the most about a piece of equipment? A. The pharmacist B. The technician C. The operator D. The operator's friend

C. The operator

A four layer PN device is classified as a __________. A. Diode junction B. Transistor C. Thyristor D. Integrated circuit

C. Thyristor

The NAND gate is sometimes called __________. A. All or nothing B. Any but not all C. Universal D. Inverter

C. Universal

A capacitor would most likely be rated: A. 5 farads B. 4 henrys C. 7 ohms D. .05 microfarad

D. .05 microfarad

The +5V level of a TTL digital signal is called a logical? A. 0 or low B. 0 or high C. 1 or low D. 1 or high

D. 1 or high

One microfarad is equivalent to __________ picofarads. A. 10 B. 1000 C. 100,000 D. 1,000,000

D. 1,000,000

165 (decimal) converted to binary would be: A. 01110100 B. 10001111 C. 10010101 D. 10100101

D. 10100101

A simple DC voltmeter with a 200 ua meter movement needs to have how much internal resistance on its 50 volt range? A. 4 k ohms B. 10 k ohms C. 20 k ohms D. 250 k ohms

D. 250 k ohms

A test plan should contain which of the following? A. Expected results B. Initial conditions for the test C. How to perform the test D. All of the above

D. All of the above

Tinning of __________ makes the best connections. A. Soldering iron tip B. Stranded wire C. Component leads D. All of the above

D. All of the above

Use of a x10 scope probe instead of a direct probe: A. Reduces circuit loading B. Increases the effective input impedance C. Decreases the signal to the scope D. All of the above

D. All of the above

Flexible coaxial transmission lines are ideal for what frequencies? A. MHz only B. kHz only C. Above GHz D. Below GHz

D. Below GHz

The velocity factor in a transmission line is: A. Equal to the termination impedance B. Determined by the line length C. Increased by the distributed capacitance and inductance of the line D. Compared to free space velocity

D. Compared to free space velocity

A x10 probe has what effect on circuit testing? A. Increase circuit loading B. Increases the signal level by 10 times C. Lowers the effective input impedance D. Decreases circuit loading that a direct probe presents

D. Decreases circuit loading that a direct probe presents

DIP refers to: A. Double integrated protection B. Dual ion positron C. Discrete icon positioner D. Dual inline package

D. Dual inline package

Overheating the component lead will likely damage __________ first. A. Transistors B. Diodes C. Capacitors D. Transformers E. Transistors and diodes

E. Transistors and diodes

What frequency band is an average AM commercial broadcast radio capable of receiving? a. 535 to 1700 kHz b. 630 to 1810 kHz c. 810 to 2120 kHz d. 2.5 to 3.10 MHz e. 3.8 to 4.2 MHz

a. 535 to 1700 kHz

The bandwidth of a standard definition analog TV signal is: a. 6 MHz b. 16 MHz c. 24 MHz d. 88 MHz

a. 6 MHz

Hex 3E is equal to a decimal number of: a. 62 b. 46 c. 37 d. 48

a. 62

A circuit with 500 ohm resistor in series with three 500 ohms connected in parallel with each other. The total resistance would be a. 666 ohms b 167.7 ohms c. 750 ohms d. 1000 ohms

a. 666 ohms

What happens to the value of a capacitor if the spacing between plates decreases? a, increase b. Stay same c. decreases d. varies

a, increase

if R = 200 ohms and I = .02 amps. What is the value of P(power)? a. .08 watts b. .8 watts c. 4 watts d. 8 watts

a. .08 watts

What is the equivalent to 100 microamps? a. .1 milliamps b. 1 milliamps c. 10 milliamps d. 10 nanoamps

a. .1 milliamps

The average of a full sine wave rectified voltage is: a. .637 x Peak b. .707 x Peak c. .707 x Peak to Peak d. 1.414 c Average

a. .637 x Peak

The capacitance of a capacitor with 10uC of electric charge and 100V across its plates is ____. a. 0.1uF b. 10uF c. 1000uF d. 107uF

a. 0.1uF

A certain transformer has 250 turns in the primary windings and 1250 turns in the secondary winding. The turns ratio is __________. a. 0.2 b. 2.5 c. 5 d. 0.5

a. 0.2

The normal open circuit voltage for each nickelcadmium cell is approx ____. a. 1.2 b. 2.1 c. 3.4 d. 6.3

a. 1.2

1 kΩ is the same as _________. a. 1000 ohms b. .001 ohms c. 10e-2 ohms d. 10000 ohms

a. 1000 ohms

What is the binary number for decimal number 9? a. 1001 b. 0101 c. 1100 d. 0110

a. 1001

A fuse, marked 250v, 650ma can be used in circuits with an "open-fuse" supply voltage of: a. 125 v b. 650 v c. 5000 v d. 250 kv

a. 125 v

A 12 vdc power supply has a 15 ohm internal resistance. What load resistance can be connected to transfer max power? a. 15 ohms b. 20 ohms c. 6 ohms d. 10 ohms

a. 15 ohms

Which wire gauge has the largest diameter? a. 20 b. 24 c. 28 d. 32

a. 20

A 10 W signal is received at 5 W. This is ____ dB loss. a. 3 b. 6 c. 1.5 d. 4.5

a. 3

A 50KHz AC voltage is applied to a 10mH inductor, its reactance at this frequency is: a. 3140 ohms b. 300 ohms c. 3100 ohms d. 500 ohms

a. 3140 ohms

Decimal 50 would appear as _____ in Hex. a. 32 b. 62 c. 106 d. 152

a. 32

The "1" in binary number 100000 carries a weight of: a. 32 b. 10000 c. 10 d. 16

a. 32

The effective voltage of a 100V Pk-to-Pk sine wave is: a. 35.35 VAC b. 70.70 VAC c. 141.4 VAC d. 31.8 VAC

a. 35.35 VAC

A capacitor (3/8" x 1/8" ceramic or mica) marked 47k is: a. 47pf +/- 10% b. 4.7uf +/- 5% c. 47uf +/-20% d. 47mf +/-10%

a. 47pf +/- 10%

Three series inductors have values of 20 mH, 30 mH and 40 mH respectively. Total inductance is: a. 90 mH b. 13.33 mH c. .075 mH d. .011 mH

a. 90 mH

A pi filter is an inductor with: a. a capacitor at each end to common b. a capactior at each end in series c. a resistor at each end to common d. a resistor at each end in series

a. a capacitor at each end to common

A fuse which has its fusible wire wrapped around an insulator is: a. a slo-blo type fuse b. an inductive fuse c. a capacitive fuse d. high voltage use

a. a slo-blo type fuse

"Switching power supplies": a. are sometimes called DC to DC converters b. are normally remote controlled c. don not convert incoming AC power to a higher frequency d. must operate off AC sources only

a. are sometimes called DC to DC converters

Which factor determines the value of a capacitor? a. area of plates b. temp coefficient of the dielectric c. inductors of dielectric d. insulation covering

a. area of plates

A personal field notebook ___. a. can help the technician keep track of special requests and reference material b. can be used to issue an on the spot invoice or receipt c. can be shared by other technicians on single shift d. is a book of forms provided by the company

a. can help the technician keep track of special requests and reference material

What is the effect on a varactor (varicap) when the reverse bias voltage is increased? a. capacitance decreases and the tuned frequency increases b. capacitance increases and the tuned frequency decreases c. diode conducts more d. signal wave becomes distorted

a. capacitance decreases and the tuned frequency increases

Toroid cores are used in transformers for a. concentrating the magnetic flux b. stepping voltage up or down c. shielding from external influences d. reforming flux lines

a. concentrating the magnetic flux

When a voltage is applied to a capacitor: a. current is max at first, then reduces as capacitor charges b. current is constant until full charged is reached c. the voltage difference between the plates reduces as full charge is reached d. there is no difference

a. current is max at first, then reduces as capacitor charges

0 dBm, when referring to audio signals means: a. decibels referencing 1 milliwatt b. decibels referenced to 1 millivolt pk-pk c. decibels referenced to 1 volt pk-pk d. zero signal output

a. decibels referencing 1 milliwatt

In an AC circuit, as the applied voltage frequency increases, the capacitive reactance in the circuit will: a. decrease b. increase c. stay the same d. either increase or decrease

a. decrease

Moving one plate of a capacitor further away from the other will: a. decrease capacitance b. increase capacitance c. decrease volt rating d. increase mutual inductance

a. decrease capacitance

In a series tuned circuit, to increase the resonant frequency, you need to: a. decrease the inductance b. add resistance c. increase the inductance d. increase input signal level

a. decrease the inductance

The antenna used to compare the gain of other antennas is called a ___. a. dipole b. rhomic c. conical disk cone d. co-linear stacked

a. dipole

Which part of a transistor carries the most current? a. emitter b. base c. collector d. each are equal

a. emitter

Which is the LEAST likely to cause ESD damage to a MOSFET? a. flux b. solder sucker c. human finger d. wick

a. flux

You would probably prefer a digital VOM over an ordinary analog meter: a. for most accuracy b. to insure operation safely c. for convenience d. when signals are intermittent

a. for most accuracy

An "audio signal" is often defined as: a. frequencies in 20 Hz to 15,000 Hz range b. baseband include visual information c. frequencies above ultrasonic d. broadband RF

a. frequencies in 20 Hz to 15,000 Hz range

FM utilizes ___ where AM utilizes signal level variations. a. frequency variations b. power variations c. sideband modulations d. period modulations

a. frequency variations

In electronic devices, what term refers to residual magnetism? a. hysteresis b. flux c. induction d. kinetic energy

a. hysteresis

The combination of resistance and reactance which restricts the flow of alternating current is called: a. impedance b. resistance c. volt-amperes d. power factor

a. impedance

A high current MOV device would most likely be found: a. in a surge suppressor b. as the radiator in microwave oven c. in DC power supply d. as oscillator in receiver

a. in a surge suppressor

In VOM's voltage multiplier resistors are important: a. in voltage scales b. in current scales c. in resistance scales d. to protect movement

a. in voltage scales

If you increase the value of an inductor, the inductive reactance will: a. increase b. decrease c. stay

a. increase

You would most likely prefer an analog VOM over a DMM for: a. intermittent fluctuations b. accuracy c. convenience d. safety

a. intermittent fluctuations

"_____" is a term describing many op-amp circuits a. inverting b. bi-directional c. low-pass d. open-quadrature

a. inverting

The radio communication mode that utilizes the basic frequency and one of the side bands: a. is called "SSB" b. is FM c. must be line-of-sight d. uses CB technology

a. is called "SSB"

A component that reduces resistance when heated: a. is negative temperature coefficient thermistor b. is positive temperature coefficient thermistor c. is a varactor d. is a thermocouple

a. is negative temperature coefficient thermistor

A zener diode is rated 6.3 v. this tells you: a. it conducts to limit the voltage across it to 6.3 v b. requires 6.3 v gate voltage to turn on c. generates 6.3 v if activated by light d. it does not allow PS voltage to go below 6.3 v

a. it conducts to limit the voltage across it to 6.3 v

an inductor with the same length of wire but whose turns are spaced further apart will have: a. less inductance b. more inductance c. equal inductance d. more mutual inductance

a. less inductance

When a transformer is designed, what most determines the output voltage from secondary? a. ratio of primary to secondary turns b. type of core material c. power rating d. secondary load

a. ratio of primary to secondary turns

Using the R x 100 range and testing between the source and drain of an N channel JFET: a. readings should be equal in both directions b. with positive to anode., reading should be 1/100th that of opposite polarity c. with negative on anode, reading should be 1/100th that of opposite polarity d. this check provides no useful information

a. readings should be equal in both directions

The results of a DVD performance test and evaluation would probably be described in a ___. a. report b. manual c. description d. transmittal

a. report

Total capacitance of capacitors connected in parallel is like: a. resistors connected in series b. capacitors connected in series c. resistors connected in parallel d. inductors connected in parallel

a. resistors connected in series

Diagnosing component failures requires the use of a/an ___. a. schematic diagram b. block diagram c. interconnect diagram d. parts list

a. schematic diagram

Information on an advanced level would be directed toward which readers? a. senior engineers b. entry level tech students c. public readers d. graduate tech students

a. senior engineers

You would want to use a dual trace oscilloscope to measure: a. signal differences between two points b. suspected resistance problems in one circuit c. one faulty circuit in voltage level while another is faulty in the current level d. one fault in video and the other in audio

a. signal differences between two points

The component that effectively becomes a short when turned on, and is turned off by disconnecting the path from the anode to cathode is the: a. silicon controlled rectifier b. schottky diode c. unijunction transistor d. field effect transistor

a. silicon controlled rectifier

The term Henry refers to _____. a. the inductive property of a coil b. the inventor of inductors c. reactance of LR circuits d. resonant frequency of tank circuits

a. the inductive property of a coil

Which of these would be an important electrical consideration in the use of a transformer? a. the operating frequency b. space requirements c. environmental temperatures d. number of laminations

a. the operating frequency

The most likely use of a transformer would be: a. to couple signals from one circuit to another b. to filter unwanted signals c. a regulator in power supplies d. to protect a circuit from excessive currents

a. to couple signals from one circuit to another

Which of these would most likely be used as a signal amplifier? a. triode b. magnetron c. triac d. DAC

a. triode

Maximum power transfer to the load occurs when the load impedance matches that of the transmission line. a. true b. false

a. true

The orientation of the transmitter antenna and the receiver antenna must match for ideal reception a. true b. false

a. true

A technician should ___. a. understand the record keeping process b. let administrative staff do all record keeping c. make multiple copies of all records they file d. allow the client to fill in their own forms

a. understand the record keeping process

The best way to remove an IC chip which is soldered into a PC board is to: a. use a desolder adapter which all pins simultaneously b. use wick and remove all solder from the pins c. heat each pin sequentiallhy while prying up on the IC d. use a solder sucker to remove

a. use a desolder adapter which all pins simultaneously

When troubleshooting equipment that is software controlled., ___. a. use of a computer may be required b. AC signals are not used c. DC voltages are always 5 volts d. diagnostics will be easy

a. use of a computer may be required

Before returning the equipment to the customer it is important that you ___. a. verify operation b. prepare the bill c. hide extras d. call customer

a. verify operation

Before beginning to troubleshoot, what should you do? a. verify the failure b. call your friend c. disassemble the equipment d. divide and take over

a. verify the failure

A capacitor opposes any change in: a. voltage b. current c. frequency d. reactance

a. voltage

Coaxial cable line losses at RF frequencies are due to: a. wire resistance, capacitive and inductive reactance b. wire resistance, dielectric fading and transconductance c. capacitive and inductive reactance and braid leakage d. magnetic effects of nearby materials

a. wire resistance, capacitive and inductive reactance

Connecting 3 capacitors of: .05 uf, 20 uf and 40 uf in series result in total capacitance of: a. 60.05 uf b. .0498 uf c. 19.95 uf d. 65 uf

b. .0498 uf

When the turns ration of a transformer is 10 and the primary AC voltage is 8V, the secondary voltage is _____. a. 80 volts b. 0.8 volts c. 8 volts d. 64 volts

b. 0.8 volts

"Microwave" as used in radio electronics, refer to: a. a kitchen appliance b. 1 GHz - 100 GHz radio frequencies c. a style of television d. an oscilloscope display interpretation

b. 1 GHz - 100 GHz radio frequencies

Which frequency is most commonly used for audio troubleshooting? a. 1000 KHz b. 1 KHz c. 1 Hz d. .1 KHz

b. 1 KHz

How long should a 1/4 wavelength vertical antenna be that is designed for operation on 146 MHz? a. 1.1 feet b. 1.6 feet c. 1.9 feet d. 2.3 feet e. 3.2 feet

b. 1.6 feet

Decimal 164 would appear as ______ in Binary? a. 10010101 b. 10100100 c. 10001111 d. 01110100

b. 10100100

A .1uF capacitor in a circuit with a frequency of 100 KHz applied has a reactance of: a. 1.59 ohms b. 15.9 ohms c. 159 ohms d. 15.9 kohms

b. 15.9 ohms

Class AB operation of an audio amplifier means that current flows through the active device(tube transistor, FET, IC) for ___________ degrees of the input signal wave a. 360 b. 180 < θ < 360 c. 45 but less than 180 d. 90

b. 180 < θ < 360

Doubling the power in a transmitter output signal is a ____ dB gain. a. 1 b. 3 c. 6 d. 10

b. 3

It is desired to raise the power to a speaker from 15 W to 30 W. This is a: a. 2 dB increase b. 3 dB increase c. 6 dB increase d. 15 dB increase

b. 3 dB increase

Soldering stations used for electronics circuit-board work have historically been (approx.): a. 5 watts b. 30 watts c. 100 watts d. 250 watts

b. 30 watts

What is the common impedance of radio communication and television coaxial cable, respectively? a. 35 and 55 ohms b. 50 and 75 ohms c. 60 and 93 ohms d. 77 and 98 ohms

b. 50 and 75 ohms

Leakage current in an electronic product, between either of the AC power cord conductors and chassis or any exposed metal parts should not exceed _____. a. 5 microamps b. 500 microamps c. 5 milliamps d. 50 milliamps

b. 500 microamps

The ripple frequency for a half wave rectifier operating from 60 Hz electrical power is: a. 30 Hz b. 60 Hz c. 120 Hz d. 240 Hz

b. 60 Hz

A byte is: a. 4 bits b. 8 bits .c. 16 bits d. 32 bits

b. 8 bits

Ingested solder fumes when particles _______. a. I'm not harmful to the human body b. Are toxic c. From lead-tin solder aren't harmful d. From tin-alloys are most harmful

b. Are toxic

The formula for calculating productivity is ___. a. B(T) = P(100) b. B / T = P(100) = P% c. P / T (B) = P% d. P(T) = P(100)

b. B / T = P(100) = P%

Which of the following amplifier configuration(s) would likely find being used in a linear push-pull arrangement? a. Class A b. Class B or AB c. Class C d. All of the Above

b. Class B or AB

What element of a DC generator distinguishes it from a AC generator? a. Slip rings b. Commutator c. Series wound field coil d. Armature

b. Commutator

the primary difference between a NPN and a PNP transistor is: a. physical shape b. DC voltages are reversed c. one is a different element d. the polarity of the power supply voltage

b. DC voltages are reversed

Which part of a superheterodyne receiver rectifies the RF carrier? a. AF circuit b. Detector circuit c. Low Pass circuit d. Modulation circuit e. RF circuit

b. Detector circuit

The atomic number of an element is the same as the element's atomic weight a. True b. False

b. False

When measuring power to a speaker, a doubling of the power represents a 6 dB increase. a. True b. False

b. False

The term for the combination of resistance and reactance that restricts the flow of alternating current is: a. Volt-amperes b. Impedance c. Susceptance d. Power factor

b. Impedance

In an AC circuit, as the applied voltage frequency changes upward, the inductive reactance in the circuit will: a. Decrease b. Increase c. Stay the same d. Either increase or decrease

b. Increase

The energy stored in a coil is measured in: a. Henrys b. Joules c. Farads d. Volts

b. Joules

____ cells are prone to battery memory. a. zinc b. NiCad c. Alkaline d. Lithium

b. NiCad

An inductor in an electrical circuit: a. Causes current to lead voltage b. Opposes the flow of AC current c. Appears capacitive to AC current d. Appears as a short circuit to AC current

b. Opposes the flow of AC current

Permanent, no-volatile, non-removable data storage in a computer is: a. RAM b. ROM c. Flash d. Optical disk

b. ROM

The 9 pin DB9 connector serial port on a PC is commonly called the ______ standard. a. centronics b. RS232 c. DIN d. USB

b. RS232

If the gate voltage level that turns on an active SCR drops below the trigger point, while anode and cathode voltages are maintained, what will occur? a. SCR turns off b. SCR stays on c. SCR turns on d. pulse is generated

b. SCR stays on

The switching power supply used in a PC takes the input from the AC line and changes it to ____. a. a lower frequency b. a higher frequency

b. a higher frequency

An AC generator is also known as a a. regulator b. alternator c. phasor d. slip ring

b. alternator

Which of these would you likely find in a DC motor speed control circuit? a. a klystron b. an op-amp c. an MOV d. LCD's

b. an op-amp

An LED: a. only emits visible light when forward bias b. can be used as a fiber optic signal source c. does not need high current flow protection d. may send or receive light signals

b. can be used as a fiber optic signal source

Some variable capacitors are made so that the plates interleave. The capacitance varies as the plates open (separate) and close. As they open: a. capacitance increases b. capacitance decreases c. voltage rating increases d. dielectric becomes more dense

b. capacitance decreases

In a motor, the counter-emf voltage induced in the armature ___ the source current. a. add to b. cause a decrease in c. does not effect d. is unaffected by

b. cause a decrease in

Which transistor circuit normally produces the largest voltage gain? a. common emitter b. common base c. common collector d. circuits produce current gain, not voltage gain

b. common base

An inductor opposes any change in: a. voltage b. current c. frequency d. reactance

b. current

If you increase the value of a capacitor, the capacitance reactance will: a. increase b. decrease

b. decrease

A negative temperature coefficient thermistor will: a. increase in resistance with temp b. decrease in resistance with temp c. no change d. increase in resistance with higher voltages

b. decrease in resistance with temp

If the frequency of the broadband input signal to an Op-Amp increases, then the output signal level ___. a. increases b. decreases c. remain the same d. increases frequency

b. decreases

A track on a computer removable disk is: a. one record b. divided into sectors c. created as data is written d. one continuous path

b. divided into sectors

Electromagnetic field polarization is determined by orientation of what part of the electromagnetic wave? a. magnetic lines of force b. electric lines of force

b. electric lines of force

A disadvantage of LCD (liquid crystal display) is: a. high current demands b. environmental temperature sensitivity c. slow reactance to input d. vibration sensitivity limitations

b. environmental temperature sensitivity

If a class A differential amplifier is using only one of its two possible inputs, what will the output signal shape be? a. zero b. exactly same as the one input c. equal in amplitude and frequency to input d. smaller than if two in-phase input signals were applied

b. exactly same as the one input

A free running oscillator is also called a monostable multivibrator a. true b. false

b. false

Diodes are made from one type of material a. true b. false

b. false

In a typical electrical generator, a small AC voltage applied to the field windings is able to control the output level of the generator. a. true b. false

b. false

The soldering traditionally used is a metal alloy consisting of zinc and copper? a. true b. false

b. false

Which of the below would normally be used for the core of a transformer? a. paper b. ferrite c. rosin d. silver

b. ferrite

An autotransformer: a. has the secondary unattached to primary b. has a single winding c. is used in vehicles only d. uses a boost coil

b. has a single winding

With + voltage to drain or source and a - voltage to the gate on an N channel JFET, internal resistance of the JFET will be: a. low b. high c, high to drain, low to source d. high to source, low to drain

b. high

What a given filter type, pure filtering is easiest with: a. low frequencies b. high frequencies c. mid frequencies d. any frequencies

b. high frequencies

In checking a capacitor to see if it is shorted, open or leaky, you would use the ___ ohm meter range. a. lowest b. highest

b. highest

which of these would apply mostly to a "balun"? a. semiconductor b. impedance matching device c. integrated circuit d. over voltage protection

b. impedance matching device

Standing waves occur on a transmission line when there is a/an ___ between transmission line and the load. a. impedance matching b. impedance mismatch c. resistance match d. reactance match

b. impedance mismatch

A logic probe: a. injects signals into logic circuits b. indicates high and low voltage conditions c. measures dB levels d. displays voltage levels on an analog scale

b. indicates high and low voltage conditions

Which type of program runs the slowest? a. assembly language b. interpreted language c. machine language d. compiled language

b. interpreted language

Ferrite _____. a. is a dielectric b. is a common inductor core material c. is most common resistor coating d. causes faulty saturation of inductors

b. is a common inductor core material

The capacitor in a power supply capacitive filter: a. is in series with the load b. is in parallel with the load c. requires serial choke d. must be in parallel with choke coil

b. is in parallel with the load

A high frequency antenna ____ than a low frequency one a. is thicker b. is shorter c. has more gain d. is longer

b. is shorter

A block in a digital diagram is called a NOR. Which is true? a. it may also be called a NAND b. it is a NOT OR or Inverted OR c. it will pass any single negative signal but no more than one d. it must be reset after any positive signals are applied

b. it is a NOT OR or Inverted OR

What happens to current flow in a capacitor when the DC voltage across it has increased to the applied voltage? a. current flow is max in capacitor b. little current flows c. polarity reverses d. voltage drop is max

b. little current flows

You would choose an LCD if you needed: a. lithium/cadmium DC source b. low current digital display c. inductive coupling device d. charge-coupled device

b. low current digital display

A series DC motor, with no load: a. tends to stop or not start b. may be damaged by excessive speed c. reverse directions d. becomes an AC generator

b. may be damaged by excessive speed

In personal computer technology, ROM indicates: a. memory that my not be addressed randomly b. memory that my only be read from c. real address mode memory d. resident operating system memory

b. memory that my only be read from

The output of a thermocouple would most likely be measured in: a. milliwatts b. millivolts c. volts d. amps

b. millivolts

What is the process of imposing intelligence on a carrier wave? a. extrapolation b. modulation c. transmission d. oscillation

b. modulation

Laminations used for the core of a transformer: a. must physically made metal to metal contact b. must be insulated from each other c. increase eddy currents d. reduce counter emf in windings

b. must be insulated from each other

Germanium diodes: a. are also called tunnel diodes b. normally drop about .3 v with forward current c. may be used as zener diodes d. more commonly called varactors

b. normally drop about .3 v with forward current

A type of transformer which has a 1:1 turns ratio ___. a. provides a ten-times voltage step-up ratio b. provides a floating secondary point c. is an autotransformer d. transforms the ground reference at its input to be same as output

b. provides a floating secondary point

A power source such as a generator or battery might be compared to what component in a water supply system? a. valve b. pump c. filter d. pipeline

b. pump

This section of the DC power supply changes AC into pulsating DC a. transformer b. rectifier c. filter d. regulator

b. rectifier

Which of these color code patterns is found of a 270Ω 5% resistor? a. red, violet, brown, silver b. red, violet, brown, gold c. red, brown, black, silver d. red, violet, black , silver

b. red, violet, brown, gold

Integrated circuit packages: a. save energy b. reduce space requirements c. require more cooling d. have radiation leakage

b. reduce space requirements

Analog radio receiver signal compression: a. uses D/A converters b. reduces the high frequency received signal amplitude c. changes AM to FM d. primarily increases background noise level

b. reduces the high frequency received signal amplitude

The voltage rating of a capacitor... a. must be factored into reactance formula b. relates to max voltage that should be applied to it c. indicates max current allowed d. is same as power factor

b. relates to max voltage that should be applied to it

Solder flux mainly: a. removes foreign material on soldering iron b. removes oxides on metals to be soldered c. control temperature of solder d. cause conductor-to-solder- chemical adhesion

b. removes oxides on metals to be soldered

Which of the following terms is associated with a commercial receiver being able to reject image frequencies? a. sensitivity b. selectivity c. discrimination d. bandwidth

b. selectivity

If you have never received formal training and practiced CPR on a person or dummy, in the event of finding a fellow worker not breathing, you ____. a. use what knowledge you have and attempt it b. should not attempt, but call for help c. should attempt after calling for help d. read the instructions and attempt

b. should not attempt, but call for help

Which motor maintains constant speed with changing loads? a. series b. shunt c. servo d. buck-boost

b. shunt

Which of these can be used to control the output level of a generator? a. rheostat in armature winding b. small DC voltage applied to field winding c. negative feedback circuit connected to commutator d. centrifugal switch

b. small DC voltage applied to field winding

A PC has conventional RAM and ROM memory area (in a PC it is 0 to 640 kilobytes); Upper memory area (640 kb to 1 meg) and Extended memory area (above 1 megabyte). what other names for internal memory types do PCs have? a. cache b. tape drive c. resistor array d. expended

b. tape drive

A variable capacitor depends on: a. applied voltages being variable b. the plate separation being adjustable c. pressure on the dielectric being adjustable d. provisions for feedback

b. the plate separation being adjustable

You would use this formula (Lt = L1 + L2 + L3): a. in a capacitive series circuit b. to find total inductance in series circuit c. for series-paralle inductive impedance d. resistive parallel circuit

b. to find total inductance in series circuit

When replacing a DIP chip, ____. a. use an ungrounded soldering gun b. use an ESD static grounded soldering pencil or work station c. use the highest temp possible to get job done quickly d. use a solder sucker and 250 W gun

b. use an ESD static grounded soldering pencil or work station

A solid-state regulator: a. is made up of SCRs b. varies conductance to maintain a level output voltage c. is simply a zener diode d. uses Diacs to sense the output voltage level and vary input voltage

b. varies conductance to maintain a level output voltage

The formula [ (µ * RL) / (RL + rD)] is used to calculate: a. forward transfer current ration of the JFET b. voltage gain of the JFET amp c. amp factor of the JFET d. transconductance of the JFET

b. voltage gain of the JFET amp

An antenna that is longer than another: a. will have higher resonance frequency b. will have a lower resonant frequency c. has a higher Q d. delivers higher power

b. will have a lower resonant frequency

Analog telephone lines have what DC voltage level across the tip and ring when off-hook? a. 110 VDC b. 6 VDC c. -48 VDC d. none

c. -48 VDC

A power supply which measures 50 volts when under no load and 40 volts under a full load has what percentage regulation using the % of regulation formula: (% = (EnL - EfL) / EfL x 100)? a. 100 b. 50 c. 25 d. 0

c. 25

What is the total capacitance of three capacitor values at 100pf, 100pf and 50 pf when connected in series? a. 25 uf b. 250 uf c. 25 pf d. 250 pf

c. 25 pf

An 8 bit binary code allows ______ logical combinations: a. 26 b. 64 c. 256 d. 512

c. 256

In a 3-input AND gate: a. 1 input must be high to have a high output b. 2 inputs must be high to have high output c. 3 inputs must be high to have a high output d. all inputs must be high to have low output

c. 3 inputs must be high to have a high output

If a 12v product is dissipating 50w, how much load resistance does the device represent? a. .24 ohms b. 24 ohms c. 4.16 ohms d. 2.9 ohms

c. 4.16 ohms

Common Intermediate Frequencies (IF's) for AM and FM commercial broadcast receivers are: a. 455 kHz and 1.2 GHz b. 288 kHz and 455 kHz c. 455 kHz and 10.7 MHz d. 288 kHz and 10.7 MHz

c. 455 kHz and 10.7 MHz

a 3/8 - inch diameter by 3/16 - inch ceramic disk capacitor marked ' 47 ' is most likely what value: a. 47 nf b. 47 uf c. 47 pf d. 47 mf

c. 47 pf

An LCD operates by polarizing the light through filters. The fluid rotates the light ___ degrees. a. 30 b. 45 c. 90 d. 180

c. 90

To trace a logic path, you might use: a. logic probe b. a DMM c. A logic pulser d. A pulse tracer

c. A logic pulser

The fact that an inductor opposes any change in current is true of: a. AC signals only b. DC signals only c. AC and DC signals d. VHF signals more than UHF

c. AC and DC signals

A PLL or phase-locked-loop circuit, contains a VCO, or voltage-controlled-oscillator. The output of the VCO is a/an ____. a. DC constant level b. in phase clock signal c. AC variable frequency signal d. 60 Hertz pulses

c. AC variable frequency signal

What does an acronym FCC mean? a. Federal Committee of Communications b. Financial Communications Commissary c. Federal Communications Commission d. Federal Communications Command

c. Federal Communications Commission

While anode and cathode voltages are maintained, the gate level on an SCR drops below the trigger point. What happens? a. SCR turns off b. SCR turns on c. SCR stays on d. nothing

c. SCR stays on

What element of a synchronous AC motor provides startup torque for the motor? a. Slip rings b. Salient poles c. Squirrel cage d. Armature

c. Squirrel cage

Resonance is when __________. a. All resistances in an AC circuit are equal to each other b. All reactances are equal on each reactive component c. The total of the inductive reactances in the circuit equal the total of all capacitive reactances d. No current is flowing through an AC circuit when a voltage is applied

c. The total of the inductive reactances in the circuit equal the total of all capacitive reactances

RF signal propagation that is normally considered "line-of-sight", would be? a. HF b. MF c. UHF d. VLF

c. UHF

A printer directly connected to a personal computer would use a __ connection. a. VGA b. Ethernet 100 Base-T c. USB or parallel Centronics d. DB15

c. USB or parallel Centronics

The vertical axis of an oscilloscope display is also called the: a. X axis b. time base c. Y axis d. output

c. Y axis

Forms should be filled in using ___. a. pencil b. erasable ink c. a black ink ballpoint pen d. a blue ink ballpoint pen

c. a black ink ballpoint pen

Which of these is most true of a PNP transistor? a. it will avalanche when cutoff is reached b. it conducts equally well forward and backward c. a negative voltage will be applied to collector d. the cathode must be heated to operate

c. a negative voltage will be applied to collector

Which of these circuits would most likely use a Zener diode? a. a receiver IF section b. a television tuner c. a power regulator d. a bridge rectifier

c. a power regulator

The formula [(∆Vp / ∆Vg)] | Ip constant ] is used to determine the ____. a. transconductance of the vacuum tube b. AC plate resistance of the vacuum tube c. amplification factor of the vacuum tube d. forward current ratio of the vacuum tube

c. amplification factor of the vacuum tube

What would be the likely cause of hum in an amplifier, but only present when the CD position is selected? a. bad filter capacitor in power supply b. open ground in CD power amplifier c. bad shielded cable from CD player d. defective speaker

c. bad shielded cable from CD player

A "Voltage signal" is defined as: a. modulated RF b. baseband include sound information c. baseband include visual information d. broadband RF

c. baseband include visual information

Which component of a microcomputer connects all of the sub systems together? a. MPU b. memory c. bus d. I/O

c. bus

The total resistance of a parallel circuit with equal branch resistance is found by _____. a. adding all branch resistance values b. by taking product of all branch resistance values c. by dividing resistance value of a branch by the number of branches d. value cannot be found

c. by dividing resistance value of a branch by the number of branches

Standing waves on a transmission cable: a. indicate max power out b. indicate less than optimal transmission c. can be caused by poor termination d. can be located with voltmeter

c. can be caused by poor termination

A resistor __________________. a. stores an electric charge b. is measured in coulombs c. cause a voltage drop across it d. dependent on lines of force

c. cause a voltage drop across it

Correctly connecting a properly rated zener diode across a power supply load will: a. protect the power transformer b. increase output DC c. limit the output DC d. eliminate ripple

c. limit the output DC

A transformer on a schematic has two leads connected to primary and three to secondary, one on each end and one in middle. This is a/an: a. audio transformer b. IF transformer c. center tapped secondary transformer d. high voltage transformer

c. center tapped secondary transformer

A thermistor: a. increases resistance with higher voltage b. decreases voltage output with heat c. changes resistance with temperature d. unaffected by heat or cold

c. changes resistance with temperature

Which one of the below will cause a generator to produce DC voltage rather than AC voltage? a. brushes b. armature c. commutator d. field windings

c. commutator

Which of these would be the first effort toward writing a report? a. outline report b. compile list of illustrations c. consider and note objectives d. make table of contents

c. consider and note objectives

What will happen to the current through a resistor if resistor value increases? a. current increases b. current stays same c. current decreases d. current and voltage increase across the resistor

c. current decreases

A variable capacitor's plates can open or close. As the plates open, capacitance: a. stay same b. capacitors aren't made way c. decreases d. increases

c. decreases

The velocity factor in an RF transmission line is determined by: a. line length b. center conductor resistivitiy c. dielectric material between center conductor and shield d. how line is terminated

c. dielectric material between center conductor and shield

Which of these would be considered a component of a "basic" power supply? a. feedback circuit b. IC regulator with short circuit protection c. diode rectifier d. circuit breaker box

c. diode rectifier

Which style of antenna radiates in opposite directions, with a pattern resembling a figure 8? a. omni directional b. yagi c. dipole d. cubical quad e. log-periodic

c. dipole

A power supply is found to have several 250 uF capacitors connected in parallel. To avoid shock from retained charged after disconnecting the power, the capacitors should be: a. ignored b. disconnected c. discharged to chassis ground, with suitable resistor d. isolated with non-conductive cover

c. discharged to chassis ground, with suitable resistor

High voltage should be discharged before servicing a product. After disabling AC input power, discharge an HV PS by: a. shorting outputs to the plastic cabinent b. disconnecting the HV lead with rubber gloves c. draining through a large value resistor to chassis ground d shorting output of the collector heat sinks

c. draining through a large value resistor to chassis ground

What problem does adding hysteresis to an ON/OFF control system fix? a. excessive overshoot of setpoint b. excessive undershoot of setpoint c. excessive cycling at setpoint d. excessive setpoint

c. excessive cycling at setpoint

Total impedance in a series circuit is found by: a. adding up all series resistance and reactance values b. subtracting all inductive reactances from all capactive reactances and adding resistor values c. finding net reactance and the net resistance, square each separately, add together and then find square mroot of the sum d. divide the applied voltage by the addition of all circuit components individual currents

c. finding net reactance and the net resistance, square each separately, add together and then find square mroot of the sum

Another name for an astable multivibrator is ___. a. latch b. one shot c. free running d. mono

c. free running

When working at heights above 6 feet, a ____ is required by OSHA rules. a. linemen's belt b. linemen's belt attached to a lanyard c. full body harness attached to a lanyard which prevents more than 6' drop d. good insurance policy

c. full body harness attached to a lanyard which prevents more than 6' drop

When soldering transistor or IC chip legs, a ____ should be used to prevent overheating of the small discrete components. a. ground lead b. flux shield c. heat sink chip d. length solder wick

c. heat sink chip

Adding armature windings in parallel to a generator's existing windings: a. increase voltage output b. increase current output c. improves voltage stability d. increases output frequency

c. improves voltage stability

An increase in voltage with resistance held constant cause current to _____. a. decrease b. increase twice to value of voltage c. increase d. none of the above

c. increase

What type of control handles long term errors? a. on/off b. proportional c. integral d. derivative

c. integral

What is the name of the diagram that shows all the general cable connections of a piece of equipment? a. schematic b. block c. interconnect d. parts list

c. interconnect

Calculating the total capacitance of several capacitors in parallel _____. a. is not necessary as they are used b. causes a need to consider inductance factors c. is done by adding each of the capacitance values d. adding by the reciprocal of capacitance values

c. is done by adding each of the capacitance values

A light emitting diode will light when: a. the gate is turn on b. at avalanche c. is forward bias d. is reversed bias

c. is forward bias

An electrolytic capacitor in series between the power transformer and the rectifiers in a power supply: a. protects diodes from power surges b. eliminates the need for filter capacitors c. is part of a voltage double circuit d. provides that earth ground be isolated from DC ground

c. is part of a voltage double circuit

When soldering high voltage connections: a. it is important than a thermal shunt be in place b. use a minimum of solder c. leave terminal with smooth and rounded covering of solder d. leave connection with rough tips

c. leave terminal with smooth and rounded covering of solder

What specification should NOT be of concern regarding wire conductors? a. resistance b. capacitance c. length d. cross sectional area

c. length

The 2nd generation digital wireless access tech that uses code patterns to separate users is : a. AMPS b. TDMA c. GSM d. CDMA

d. CDMA

Impedance (Z, in ohms) includes: a. inductance and capacitance b. henries, farads, and ohms c. resistance, capacitive reactance and inductive reactance d. joules, farads, henries

c. resistance, capacitive reactance and inductive reactance

A small power drill or electric mixer would probably be powered by a/an ___ motor. a. three-phase b. induction c. series d. parallel

c. series

What type of motor will speed dangerously out of control if not physically loaded? a. induction motor b. shunt wound DC motor c. series wound DC motor d. series wound AC motor

c. series wound DC motor

You are servicing a power supply and have disconnected power. It has several 250 uF capacitors connected in parallel. To avoid shock, these capacitors: a. should be disconnected b. may be ignored c. should be discharged to chassis ground, through a suitable resistor d. should be isolated

c. should be discharged to chassis ground, through a suitable resistor

An example of a solid state device is ____. a. cermet resistor b. tantalum capacitor c. silicon diode d. vacuum tube

c. silicon diode

Lead free type solder for electronics work is made from: a. silver and bismuth b. lead and tin c. silver and tin d. acid core

c. silver and tin

An AC induction motor requires what to operate? a. input power b. slip rings c. slip d. rotor battery

c. slip

Which of these statements is most true of relating to schematic diagram of electronic devices? a. they provide pictorial representations of components b. they supply manufacturing specs of components c. they represent signal paths d. they provide user operational procedures

c. they represent signal paths

The fifth color band on a 5% resistor is yellow. This tells you: a. it has an extremely high degree of accuracy b. manufacturer c. tolerance d. recommended frequency range

c. tolerance

To test an SCR with an ohmmeter: a. cannot be done b. check resistance same as transistors c. with + to anode and - to cathode, short gate and anode together. should go from near "open" to near "short" d. with - to anode and + to cathode, short gate and cathode together. should go from near "open" to near "short"

c. with + to anode and - to cathode, short gate and anode together. should go from near "open" to near "short"

A power supply whose output voltage does not change whether the load is light or heavy, would have what percent of regulation? a. 100 b. 50 c. 20 d. 0

d. 0

Which frequency will have a higher loss when using coaxial cable transmission line? a. 550 kHz b. 27 MHz c. 470 MHz d. 1 GHz

d. 1 GHz

Audio signals, such as the output from DVD players, satellite receivers and preamplifiers, usually are of what amplitude for input to a TV, modulator or other equipment? a. 100 microvolts peak-to-peak b. 1000 microvolts pk-to-pk c. 1 millivolt pk-to-pk d. 1 volt pk-to-pk

d. 1 volt pk-to-pk

You are troubleshooting audio reproduction equipment and measure the signal to be input into the audio amplifier. What approx. RMS level would you expect that signal to be? a. audio signals vary too much to be measured b. 1 microvolt c. 1 millivolt d. 1,000 millivolts

d. 1,000 millivolts

The fast charging rate for a NiCad or Ni-MH battery should not exceed ___% of its AHr, or ampere per hour rating: a. 5 b. 100 c. 25 d. 10

d. 10

I = 1 amp, R = 10,000 ohms. what is the value of the voltage? a. 1 volts b. 10 volts c. 100 volts d. 10,000 volts

d. 10,000 volts

What is the ripple frequency of a full-wave single phase bridge rectifier operated at 60 Hz? a. 180 Hz b. 90 Hz c. 360 Hz d. 120 Hz

d. 120 Hz

Which of these would you normally choose to cause an LED to light? a. 3 mV AC b. 3 mV DC c. 30 mV DC d. 3 V DC

d. 3 V DC

A resistor with color bands orange, red, brown is _____. a. 3.2 mega ohms b. 232 ohms c. 2.3 kilo ohms d. 320 ohms

d. 320 ohms

The most common solder used by electronics technicians consists of: a. 50% aluminum, 50% tin b. 50% zinc, 50% copper c. 63% copper, 37% tin d. 60% tin, 40% lead

d. 60% tin, 40% lead

The form of signaling used on telephone systems today is ____. a. ACS b. ISDN c. POP d. CCS

d. CCS

One significant difference between a TV antenna and a CB antenna is: a. TV is much lower frequency, thus longer b. TV is a narrow band, thus antenna length not critical c. CB is FM and TV is AM d. TV is polarized horizontal while CB is vertical

d. TV is polarized horizontal while CB is vertical

Which of the following word(s) is in the acronym TEST: a. Time b. Ego c. Spectral d. Technical Education

d. Technical Education

Which video system has the highest resolution? a. EGA b. VGA c. SVGA d. XVGA

d. XVGA

A dual-trace oscilloscope may have: a. two electron guns b. one frequency control c. one set of position controls d. a Z input for intensity modulation

d. a Z input for intensity modulation

Troubleshooting discrete circuits involves a knowledge of____. a. circuit function b. where product was made c. how it failed d. a and c

d. a and c

An advantage a transistor has over vacuum tube triode is: a. a triode cannot conduct from cathode to anode b. a transistor does not require an anode load c. a triode requires grid bias d. a transistor normally has a longer life

d. a transistor normally has a longer life

A Triac in a power control circuit: a. provide regulation b. limits surges c. acts as a fuse d. acts as an on/off switch

d. acts as an on/off switch

Record keeping is needed for which activities? a. customer service b. warranty service validation c. business planning d. all of the above

d. all of the above

Using a resistor instead of an inductor in a power supply pi filter: a. less expensive b. less efficient c. doesn't filter AC well d. all of the above

d. all of the above

When working with and testing lead-acid batteries: a. wear eye protection in case battery caps are off b. short between terminals only if well ventilated area c. when charging, keep room closed off d. always wear eye protection, never cause a spark and charge in a ventilated room

d. always wear eye protection, never cause a spark and charge in a ventilated room

A MOSFET: a. can be called a zener b. typically has low input impedance c. retain data d. amplifies signal voltage variations

d. amplifies signal voltage variations

What is not a part of a superheterodyne radio receiver? a. intermediate Frequency circuit b. radio frequency circuit c. audio frequency circuit d. audio radiation resistance circuit

d. audio radiation resistance circuit

A technician must be knowledgeable about "EDS": a. to be able to select proper soldering device b. because voltage sensitive devices come in numerous sizes c. in order that he will have the proper test equipment for them d. because static discharge can destroy many components

d. because static discharge can destroy many components

The digital method of representing characters by using combinations of zeroes and ones is called: a. decimal b. alpha c. duplex d. binary

d. binary

A dual-trace scope has: a. two focus controls b. two set of position controls c. two vertical inputs d. both b and c

d. both b and c

In telecommunications work, ___ is replacing twisted pair cabling. a. microwave b. wireless c. fiber optics d. both b and c

d. both b and c

Residual voltage is associated with ____. a. Northern Lights b. corona arcing from electrical generators c. charge retained by inductors d. charge retained by capacitors

d. charge retained by capacitors

The time required to discharge a capacitor depends on the ____ across in terminals. a. the total capacitance b. the total resistance c. the total inductance d. combination of LRC

d. combination of LRC

_____ will cause a generator to produce DC voltage rather than AC. a. slip rings b. load c. armature loops d. commutator

d. commutator

What is the most important service you provide? a. technical expertise b. equipment repair c. smarts d. customer service

d. customer service

Three-phase power is obtained from an AC generator by wiring the armature winding in a ___ or ___ configurations. a. alpha, beta b. treble, bass c. polymorph, triad d. delta, wye

d. delta, wye

What type of control handles the rate of change of the error? a. on/off b. proportional c. integral d. derivative

d. derivative

The audio detector circuit in an AM radio most commonly is a: a. discriminator circuit b. bridge circuit c. transformer d. diode

d. diode

A ____ is a reference antenna that all other antennas will gain are compared to. a. yagi b. omni c. mast d. dipole

d. dipole

Which would least likely be a high-voltage (above 1,000V) capacitor? a. mica b. ceramic c. paper d. electrolytic

d. electrolytic

Ordinary alpha/numeric information transmitted by a computer is converted to binary using: a. decoder b. crystal c. multiplexor d. encoder

d. encoder

When using fiber optics to transfer a signal, the light must: a. be visible b. be LED generated c. be between 3 GHz and 30 GHz d. enter the "cone of acceptance"

d. enter the "cone of acceptance"

The gain of an op-amp as an inverting amplifier is determined by the external ___. a. supply voltage b. + input DC voltage c. series input resistor d. feedback and input resistors

d. feedback and input resistors

Which of the below would be considered "basic" components of a non switching power supply? a. zener, regulator, transformer, SCR b. regulator, diodes. AC power, laod c. transformer, bridge, capacitor, load d. filter, rectifier transformer

d. filter, rectifier transformer

What is the oldest piece of troubleshooting equipment a technician has? a. oscilloscope b. analog volt meter c. galvanometer d. five senses

d. five senses

What should be used first to clean a corroded plated soldering iron tip? a. coarse emery cloth while cold b. wet sponge with acid core solder after heating c. file d. flux, cloth after heating

d. flux, cloth after heating

You suspect the unit has an internal short. To prevent further damage when you apply power, you should: a. short around main fuse or breaker and proceed, watching for heat or arching b. replace unit without attempting to repair it due to time and cost c. measure resistance at dc connectors and compare to factory specs d. insert low resistance high wattage (100 ohm, 10 W) resistor in series with power input

d. insert low resistance high wattage (100 ohm, 10 W) resistor in series with power input

The Z axis on an oscilloscope is: a. vertical b. horizontal c. depths d. intensity

d. intensity

A schematic used in electronic servicing: a. shows the size and shape of all components in the unit b. is sometimes called a block diagram c. shows the location and arrangement of components in the unit d. is much like a road map for following signals

d. is much like a road map for following signals

A ripple counter: a. is a meter that indicates power supply ripple frequency b. is a network of many XNAND gates regulating the computer oscillator c. is asynchronous counter that stores the counts of other counters in a computer d. is two or more logical flip-flops connected sequentially with the inputs pulses toggling the first one

d. is two or more logical flip-flops connected sequentially with the inputs pulses toggling the first one

The rechargeable cells currently used in many consumer portable products would be: a. lead-acid b. carbon-zinc c. lithium d. lithium-ion

d. lithium-ion

To accurately measure a resistance across a transistor's emitter-base junction, use a ___. a. higher ohmmeter range b. lower ohmmeter range c. high ohms function d. low ohms function

d. low ohms function

Which of these signal parameters does a spectrum analyzer show? a. current and phase b. leakage capacitance c. video color signal separation d. magnitude and frequency

d. magnitude and frequency

The difference between minterm and maxterm is ___. a. minterm, Y=1, least # of gates is AND b. maxterm, Y=1, least # of gates is OR c. minterm, Y=0, least # of gates is OR d. maxterm, Y=0, least # of gates is AND

d. maxterm, Y=0, least # of gates is AND

A stereo amplifier has a severe hum whether CD, AUX, FM or AM radio are selected. what is the most likely cause? a. volume control shorted b. defective output transistor grounding c. power cord polarity wrong d. power supply filtering

d. power supply filtering

Where are the results of math operations stored in a microprocessor? a. ALU b. bus control c. instruction decoder d. register

d. register

Phototransistors: a. require visible light b. requires LED's to operate c. emit light when activated d. sensitive to invisible light

d. sensitive to invisible light

The telephone communication term "cellular" refers to: a. undefined telephone radio channels b. a provider trade name c. Caller Environment Lone Line service d. small geographic areas covered by each base station

d. small geographic areas covered by each base station

Which device is capable of causing magnetic or inductive damage to electronics devices? a. pencil soldering iron b. high wattage soldering iron c. solder suckers d. soldering gun

d. soldering gun

Which of these would be written in the most detailed, concise manner? a. manual b. article c. proposal d. technical report

d. technical report

VHF and UHF antennas don't use waveguides as feed lines because: a. they create grounding problem b. their resistance to high frequency is too high c. the characteristic impedance is too high d. the large dimensions at these wavelengths makes other transmissions lines more practical

d. the large dimensions at these wavelengths makes other transmissions lines more practical

Which of the following is not a characteristic of a series circuit? a. circuit components have a division of the supply voltage b. all components share one current c. energy is shared by reactive devices d. there is a different level of current in the reactive components than in the resistive components

d. there is a different level of current in the reactive components than in the resistive components

A TRIAC is frequently used to? a. for high power generation b. a power supply rectifier c. for power surge protection d. to electronically turn equipment on and off

d. to electronically turn equipment on and off

Which propagation condition would be significant for a UHF signal to be received at a distance of 500 miles? a. line-of-sight b. faraday rotation c. groundwave d. tropospheric ducting

d. tropospheric ducting

To simplify the following of an electrical signal path through circuitry, you could: a. draw a detailed schematic b. remove complicated components c. restrict troubleshooting to taking voltage measurements d. use a block diagram

d. use a block diagram

After printing your first draft of a publication, which of these should occur next? a. distribute to intended recipients b. submit to management for approval c. ask co-worker to proofread d. you should proofread it

d. you should proofread it

if a 1.02 MHz signal and a 1.475 MHz signal are fed to a common-emitter transistor amp biased to operate in a non-linear manner we would expect to see which of the following frequencies in the output? a. 455 kHz b. 1.02 MHz c. 1.475 MHz d. 2.495 MHz e. All of the Above

e. All of the Above

An electronic power supply may be designed to ___. a. change DC to DC b. change AC to AC c. change frequency d. change AC to DC e. All of the above

e. All of the above

Keeping a record for customer service purposes ensure that ___. a. parts inventory levels are maintained b. technician can verify billable hours c. follow-up service can be provided d. none of the above e. all of the above

e. all of the above

A "Digital Storage Oscilloscope": a. uses micro processing and memory to allow close analysis of signals b. is specially designed for analyzing digital signals c. converts analog input signals to a digital display d. alternatives between digital and analog display traces e. a and b f. a, b and c

f. a, b and c