ASVAB-SECTION-5 Online Practice Questions and Answers

Impedance is represented by the symbol __________.

A. XL

B. R

C. XC

D. Z

In an electrical circuit, if one wanted to reduce the current and/or divide the voltage, one would use a ___________.

A. rectifier

B. reducer

C. reflector

D. resistor

A semiconductor describes elements that have __________ electrons in their valance shell.

A. 3

B. 4

C. 2

D. 1

This diagram illustrates an electrical circuit wired in ___________.

A. series-parallel

B. parallel-parallel

C. series

D. parallel

What is the voltage across and current through the resistor R when the switch is open?

A. 0 A Current; 8 V voltage

B. 2 A Current; 2 V voltage

C. 0 A Current; 0 V voltage

D. 2 A Current; 8 V voltage

How many diodes should you expect to find in a bridge rectifier?

A. 0

B. 4

C. 8

D. 10

A light bulb is 60 watts.

Operated at 120 volts, how much current does it draw?

A. 0.5 ampere

B. 5.0 amperes

C. 50.0 amperes

D. 7.200 amperes

Neutral wire is always __________.

A. whitish or natural

B. black

C. green

D. blue

If you operate an incandescent light bulb at less than its rated voltage __________.

A. the bulb will burn brighter and last longer.

B. the bulb will burn dimmer and last longer.

C. the bulb will burn brighter but won't last as long.

D. the bulb will burn dimmer but won't last as long.

A microwave is rated at 1,200 watts.

At 120 volts, how much current does it draw?

A. 1 amp

B. 10 amps

C. 100 amps

D. 1,440 amps

This symbol means __________.

A. ohm

B. ampere

C. high voltage

D. wattage

If a 120-volt current is protected by a 25-amp circuit breaker, what's the largest number of watts an appliance can safely use?

A. 1,200 watts

B. 1,800 watts

C. 3,000 watts

D. 3,600 watts

16-gauge wire is _____________ than 12-gauge wire.

A. less flexible

B. more flexible

C. thinner

D. thicker

How much power is being carried in a 220-volt circuit when the current is 10 amps?

A. 22 watts

B. 220 watts

C. 2,200 watts

D. 4,400 watts

Radio frequency amplifiers are used in __________.

A. audio amplifiers

B. differential amplifiers

C. operational amplifiers

D. receivers and transmitters