ASVAB Electronics Information Practice Test 344263 Results

Your Results Global Average
Questions 5 5
Correct 0 3.78
Score 0% 76%

Review

1 What's the overall power consumption of a piece of equipment that is rated for 4 amps at 120 volts?
80% Answer Correctly
481 W
480 W
432 W
478 W
Solution
Power is measured in watts (W) and 1 watt equals 1 ampere multiplied by 1 volt: P = \( V \times I \). For this problem, the equipment is rated for 4 amps (I) at 120 volts (V) so the equation becomes P = \( 120 \times 4 \) = 480 W
2

Which of the following is a difference between a circuit breaker and a fuse?

80% Answer Correctly

a circuit breaker can be reused

a fuse responds more quickly than a circuit breaker

a fuse is cheaper than a circuit breaker

all of these
Solution

Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.

3

The conductivity of an element depends on how many electrons occupy which electron shell?

78% Answer Correctly

outer

inner

middle

first
Solution

All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.

4

Resistance is opposition to which of the following?

70% Answer Correctly

conductance

current

voltage

impedance
Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.

5

Resistance and current are __________ proportional.

68% Answer Correctly

directly

inversely

not

exponentially
Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.