ELECTRONICS INFORMATION 2022

The convenience out let above that is known as a polarized outlet is number a. 1 b. 2 c. 3 d. 4

2

In electronic circuits, the symbol shown above usually represents a a. resistor b. battery c. capacitor d. transformer

Battery

what are the three leads of a common transistor? a. Collector, Base, Emitter b. Base, Collector, Case c. Emitter, Collector, Bias d. Collector, Bias, Omiter

Collector, Base, Emitter

The five lamps shown are each rated at 120 volts, 60 watts. If all are good lamps, lamp 5 will be 9-A much brighter than normal. 9-B about its normal brightness. 9-C much dimmer than normal. 9-D completely dark.

Completely dark

In comparing Nos. 00, 8, 12, and 6 A.W.G. wires, the smallest of the group is a. No. 00 b. No. 8 c. No. 12 d. No. 6

No. 12

Wires are often spliced by the used a fitting like the one shown above. The use of this fitting does away with the need for a. skinning b. cleaning c. twisting d. soldering

Twisting

Is it proper procedure to ground the frame of a portable motor? a. no b. no, if it is AC c. Yes, unless the tool is specifically designed for use without a ground d. Yes, if the operation take place only at less than 150 volts

Yes if the operation take place only at less than 150 volts

Connecting a lead for the anode to the cathode of a battery with produce a. a high resistance circuit b. a short circuit c. a low current path d. an open circuit

a high resistance circuit

To determine directly whether finished wire installations possess resistance between conductors and ground, use 8-A clamps. 8-B set screws. 8-C shields. 8-D a megger.

a megger

Which of the following has the least resistance? S2-A Wood S2-B Silver S2-C Rubber S2-D Iron

b. Sliver

What does the abbreviation AC stand for? S1-A Additional charge S1-B Alternating coil S1-C Alternating current S1-D Ampere current

c. alternating current

An electrician should consider all electrical equipment "live" unless he or she definitely knows otherwise. The main reason for this practice is to avoid 2-A doing unnecessary work. 2-B energizing the wrong circuit. 2-C personal injury. 2-D de- energizing a living circuit

c. personal injury

Microfarads are units of measurement usually associated with a. sockets b. witches c. capacitors d. connectors

capacitors

The device that is often used to change the voltage in alternating current circuits is the a. contactor b. converter c. rectifier d. transformer

converter

A centi measures a (n ) a. eighth b. millionth c. hundredth d. ten- thousandth

hundredth

The core of an electromagnet is usually 1-A aluminum. 1-B brass. 1-C lead. 1-D iron.

iron

What does LED stand for? A. light emitting display b. low Energy display c. light emitting diode d. light emitting detector

light emitting detector

To control a lamp from two different positions, it is necessary to use a. two single pole switches b. one single pole switch and one for way switch c. two three way switches d. one single pole switch and two four way switches

one single pole switch and one four way switch

The sketch above shows a head on view of a three pronged plug used with portable electrical power tools. considering the danger of shock when using such tools, it is evident that the function of the U- shaped prong is to a. ensure that the other two prongs enter the outlet with the proper polarity. b. provide a half voltage connection when doing light work c. prevent accidental pulling of the plug from the outlet d. connect the metallic shell of the tool motor to ground

prevent accidental pulling of the plug from the outlet

In a house bell circuit, the push button for ringing the bell is generally connected in the secondary of the transformer feeding the bell. one reason for doing this is to a. save power b. keep line voltage out of the push button circuit c. prevent the bell from burning out d. prevent arcing of the vibrator contract points in the bell

prevent arcing of the vibrator contact points in the bell

The device used to change AC to DC is a 4-A frequency changer. 4-B transformer. 4-C regulator. 4-D rectifier.

rectifier

If voltage is represented by V, current by I, and resistance by R, then the one of the following that correctly states Ohm's Law is a. r = v x 1 b. r = I/V c. v = IR d. v= I/R

v= I/R