ASVAB Electronics Information Practice Test 212096 Results

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

Review

Which of the following will help to prevent a short circuit?

74% Answer Correctly

	resistor
	transistor
	diode
	fuse

Solution

Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.

One of the lights on your Christmas tree burns out and this causes the rest of the lights connected to that strand to go dark. How are the lights in that strand connected?

73% Answer Correctly

	perpendicular
	series-parallel
	series
	parallel

Solution

Lights connected in series form a chain with each light connecting to adjacent lights via one wire. Therefore, if one of the lights burns out and breaks the series, none of the other lights will receive power and they'll go dark. Lights connected in parallel each connect to the positive and negative nodes of the power source and would not go dark if one of their neighbors burnt out.

Direct current flows from the __________ terminal of the voltage source to the __________ terminal.

62% Answer Correctly

	positive, negative
	negative, negative
	negative, positive
	positive, positive

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.

4 What's the overall power consumption of a piece of equipment that is rated for 3 amps at 150 volts?

80% Answer Correctly

	450 W
	451.5 W
	456 W
	405 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 3 amps (I) at 150 volts (V) so the equation becomes P = \( 150 \times 3 \) = 450 W

5 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 70 Ω and current is 1 amps.

85% Answer Correctly

	63 V
	70 V
	72 V
	105 V

Solution

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

V = \( I \times R \) = \( 1 \times 70 \) = 70 V