ASVAB Electronics Information Practice Test 986250 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.42
Score	0%	68%

Review

An amplifier is most similar in function to which of the following:

65% Answer Correctly

	step-up transformer
	transistor
	step-down transformer
	capacitor

Solution

An amplifier is a device that takes a small input signal and creates a larger output signal. This makes it most similar to a step-up transformer which takes a smaller input voltage and creates a larger output voltage.

From what energy do photovoltaic cells produce electrical energy?

68% Answer Correctly

	nuclear
	sun
	chemical
	magnetic

Solution

A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.

3 What's the overall power consumption of a piece of equipment that is rated for 4 amps at 60 volts?

80% Answer Correctly

	240 W
	216 W
	248 W
	120 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 60 volts (V) so the equation becomes P = \( 60 \times 4 \) = 240 W

This circuit component symbol represents a(n):

65% Answer Correctly

	transistor
	DC source
	transformer
	AC source

Solution

In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.

Which of the following is not a characteristic of a step-up transformer?

54% Answer Correctly

	increases voltage
	the secondary voltage is higher than the primary voltage
	has more turns in the secondary winding than in the primary winding
	the primary voltage is higher than the secondary voltage

Solution

As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.