ASVAB Electronics Information Practice Test 33117 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.72
Score	0%	74%

Review

If an electrical circuit is interrupted, which of the following will result?

61% Answer Correctly

	open circuit
	parallel circuit
	closed circuit
	short circuit

Solution

A closed circuit is a complete loop or path that electricity follows. It consists of a source of voltage, a load, and connective conductors. If the circuit is interrupted, if a wire is disconnected or cut for example, it becomes an open circuit and no electricity will flow.

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	increases
	decreases
	does nothing to
	eliminates

Solution

All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.

3 A circuit with a 120-volt power supply is protected by a 20-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

85% Answer Correctly

	2400 W
	2393 W
	2160 W
	2405 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 20A circuit breaker would allow is 120V x 20A = 2400 W.

The formula specifying Ohm's law is which of the following?

77% Answer Correctly

	\(V = {R \over I}\)
	V = IR
	V = I²R
	\(V = {I \over R}\)

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

5 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 100 volts?

92% Answer Correctly

	1600 W
	800 W
	266 W
	400 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 8 amps (I) at 100 volts (V) so the equation becomes P = \( 100 \times 8 \) = 800 W