Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7, Part 8, Part 5

What do the transistors in a 555 timer do?

Act as switches

What flight control allows the aircraft to roll?

Aileron

ESD is negligible provided what condition exists?

All electrical/electronic structures are properly bonded

When installing equipment in aircraft, what references do you use?

All of the above (approved flight manual, STCs, aircraft service or maintenance manual)

Most accidents are caused by what?

All of the above (unsafe acts of individuals, using improper parts, improper equipment installation)

When should a person stop administering mouth to mouth resuscitation/CPR?

All of the above (when the person administering COR becomes physically tired, when the person becomes conscious, when medical help arrives)

The amplifier's class of operation is determined by what?

Amount of forward bias

What parts of a relay comprise the Secondary (Controlled) Circuit?

Armature, contacts, and spring

Transformers are considered what kind of filter?

Band pass

An aircraft in flight; is the pressure on the wing greatest on the top or bottom?

Bottom

If the capacitor value in a filter (power supply rectifier) is increased, the AC ripple effect will (T=RC):

Decrease

If the forward bias is increased in an NPN transistor the resistance will

Decrease

If the volts across a capacitor is decreased, the stored voltage will?

Decrease

The "negative temperature coefficient" of a thermistor means that as temperature increases, resistance will do what?

Decrease

Wire has a gauge starting at 1 and goes to 40. Does the cross-section increase or decrease with a larger American Wire Gauge (AWG) number?

Decrease

What happens to wire resistance if the cross-section (area) increases

Decreases

Using the swamping resistor of thermal stability, what type of feedback is developed to control the amplifier?

Degenerative

What type of amplifier coupling is used that can amplify DC voltages as well as AC signals?

Direct

What are some causes of ESD?

Dry conditions (0-20% humidity rate) or poor bonding

Unless otherwise stated, any values of AC current or voltage in a circuit are assumed to be:

Effective (RMS) values

How do you clean corrosion from aluminum?

Emery cloth, aluminum wool

When different rated capacitors are connected in parallel in a circuit, the total capacitance is:

Equal to the sum of all the capacitors

When inductors are connected in series in a circuit, the total inductance is:

Equal to the sum of the individual inductors

The astable multivibrator is a:

Free running oscillator

The common base amplifier has a voltage gain _______ than one, but a current gain _______ than one.

Greater, less

When the J-K flip-flop input is triggered (toggle mode), what is the output frequency?

Half of the input

What does the phrase "cradle to grave" refer to?

Hazardous waste management programs

Which of the following devices is used to dissipate heat into the air?

Heat sink

What would a DMM read when testing a capacitor?

High impedance

Is hysteresis loss greater at higher or lower frequency?

Higher

What is the leading cause of accidents?

Human error

The basic requirements for sustaining oscillations in an oscillator are a power supply, FDD, amplifier, and ____.

Regenerative feedback

If you notice a person has a hearing injury or noise fatigue, what should you do first?

Remove them from the noisy area

What must you do before giving first aid to an electrical shock victim?

Remove victim from the live circuit, disconnect power from the circuit

What must be done to a torque wrench when finished?

Reset to the minimum setting

What is the most common type of fuselage design?

Semi-monocoque

What type of waveform is produced by a sinusoidal oscillator?

Sine wave

What type of output waveform is produced by an astable multivibrator?

Square wave or rectangular

What is the combination of horizontal stabilizer and an elevator called?

Stabilator

What do flip-flops do? (When used in Static RAM)

Store bits of data (1 bit per flip-flop)

When testing a diode, infinite resistance is measured in both directions. What is the problem?

The diode is open

The interchange of energy between the inductor and capacitor in a tank circuit is called?

The flywheel effect

What distinguishes a solenoid from a basic relay?

The plunger (armature) pulled into the coil

What part of a basic relay returns the armature to its de-energized position?

The spring

What does it mean if there is no 4th band on a resistor?

+/- 20% tolerance

What is 250,000 written in scientific notation?

2.5 x 10^5

What rate of humidity is conducive to the creation of ESD conditions?

0-20%

What should be removed at preflight?

Red streamers, covers, plugs, anything that states "remove before flight"

What is the resistance of normally closed contacts when the relay is de-energized?

0Ω/short

If the fourth band on a resistor is silver, what is the tolerance?

10%

How many watts is considered an RF danger?

1000 watts

Aircraft wire is normally rated at what voltage?

115VAC

In a common collector amplifier degenerative feedback is how many degrees out of phase with the input signal?

180 degrees

How many time constants does it take for a capacitor to be approximately 100% fully charged?

5

How many ohms is the aircraft radio impedance? (AKA Surge Impedance)

50Ω

What ohmic value of impedance are aviation transmission line (antennas, coax)?

50Ω

If the positive alteration of a square wave is 100 μsec in duration, then the PRF is

5KHz

What percentage of the applied voltage will the capacitor be at after one time constant?

63.2%

What does a filter in an electrical circuit consist of?

A capacitor and an inductor

What is the term for the outside shape or curvature of the wing?

Camber

What wing structure has internal bracing (spars)?

Cantilever

What is the international symbol for current?

Capital letter "I"

Who is responsible for providing an (M)SDS with chemicals?

Chemical manufacturer

What parts of a relay comprise the Primary (Control) Circuit

Core and coil

What is the flow of electrons through a conductor called?

Current

In a 1/4λ antenna, if a capacitor is added in series (to tune the antenna) what would happen to frequency?

Increase

What happens to wire resistance if the length is increased?

Increases

The opposition offered by a coil to the flow of alternating current is called what?

Inductive reactance

How do capacitors behave with frequency changes?

Infinite ohms or an open for low frequency and zero ohms or a short for high frequency

What will a DMM read if a fuse is broken?

Infinite resistance/"OL" (Outside Limits)

The monostable multivibrator output PRF is determined by the:

Input trigger frequency

What type of corrosion attacks the grain boundaries of metal?

Intergranular corrosion

What is the most commonly used type of flip flop?

J-K

When reading the resistance of a discharged capacitor it reads a constant 40 ohms. What is the problem?

Leaky capacitor

What is the "hand rule" for magnetic induction in generators?

Left hand rule

Is effective voltage in an AC circuit greater or less than the maximum instantaneous voltage?

Less than

When two or more inductors of different inductance are connected in parallel in a circuit, the total inductance is:

Less than the inductance of the lowest rated inductor

In an AC circuit, the effective voltage is:

Less than the maximum instantaneous voltage

When using a Digital Multimeter (DMM) or Ohmmeter to test a forward biased BJT emitter to base junction, what will the resistance be?

Low

If the secondary winding of a transformer is partially shorted, what will the voltage be?

Lower than normal voltage

How do you move elevators?

Move the yoke forward and backward

The basis for transformer operation in the use of alternating current is called what?

Mutual inductance

Which type of tester supplies it's own power?

Ohmmeter

What type of corrosion has a white powder type look to it?

Pitting

If the current in the diodes of an AC rectifier is reversed, what will happen to the output waveform?

Polarity is reversed

What happens if you connect the diode backwards in a full wave bridge rectifier?

Polarity will be reversed

Why is stainless steel safety wire used with steel bolts?

Prevent dissimilar metal corrosion

Which is the safest way to use a wrench, by pushing or pulling?

Pulling

What converts AC to DC?

Rectifiers

What maintenance practice is best for Foreign Object Damage (FOD) prevention?

Tool management

True/False: A transistor that acts as an open or is in cut-off means Vce = Vcc

True

True/False: The gold color band is never used as the first number on a resistor?

True

How many paths of current are required for a holding relay coil?

Two

If you add a parallel leg (resistor) in a circuit, what changes will happen?

Voltage remains the same, resistance decreases, current increases

If your output voltage is 0V when troubleshooting a circuit, what would you check input voltage with?

Voltmeter

Which type of diagram will tell the size of an electrical wire?

Wiring diagram

Can you use 0.032" safety wire with a 0.045" hole?

Yes

Is it ok to use the single strand safety wire method for electrical connections?

Yes

Current of 50 millamps can cause what?

asphyxiation, heart failure, and death

What principle do transformers operate on?

mutual inductance