ASVAB Electronics Information Practice Test 122665 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.32
Score	0%	66%

Review

1 What's the overall power consumption of a piece of equipment that is rated for 9 amps at 50 volts?

80% Answer Correctly

	450 W
	495 W
	1350 W
	900 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 9 amps (I) at 50 volts (V) so the equation becomes P = \( 50 \times 9 \) = 450 W

Which of the following will increase the magnetic field produced by the electric current in a wire?

68% Answer Correctly

	construct the wire from insulative material
	wind the wire into a coil
	construct the wire from conductive material
	wrap the wire around a ceramic core

Solution

A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.

This circuit component symbol represents a(n):

70% Answer Correctly

	fuse
	capacitor
	resistor
	diode

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.

4 Suppose you have 8 [6V 25A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 8 batteries?

46% Answer Correctly

	8V 150A
	6V 200A
	48V 25A
	24V 100A

Solution

Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 48V 25A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 200A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 24V 100A configuration.

The most common circuit configuration is:

58% Answer Correctly

	household
	series-parallel
	parallel
	series

Solution

Circuits are not limited to only series or only parallel configurations. Most circuits contain a mix of series and parallel segments. A good example is a household circuit breaker. Electrical outlets in each section of the house are wired in parallel with the circuit breaker for that section wired in series making it easy to cut off electricity to the parallel parts of the circuit when needed.