ASVAB Electronics Information Practice Test 820539 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.46
Score	0%	69%

Review

This circuit component symbol represents a(n):

65% Answer Correctly

	AC source
	transistor
	transformer
	DC 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.

The hertz is a unit of measurement for:

81% Answer Correctly

	energy
	inductance
	power
	frequency

Solution

The hertz is a unit of measurement for frequency.

Silver and gold are among the most highly conductive elements. Why is copper used much more often as a conductor in electrical circuits?

80% Answer Correctly

	copper is durable and relatively cheap
	silver and gold are brittle
	silver and gold are costly
	all of these

Solution

All conductors have resistance and the amount of resistance varies with the element. But, resistance isn't the only consideration when choosing a conductor as the most highly conductive elements like silver and gold are also more expensive and more brittle than slightly less conductive elements like copper. A balance needs to be struck between the electrical qualities of a material and its cost and durability.

Which of the following is not a terminal on a transistor?

59% Answer Correctly

	base
	collector
	input
	emitter

Solution

A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.

What is the frequency of most household electrical systems?

59% Answer Correctly

	60Hz
	110Hz
	110V
	60MHz

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. Most households use electricity with a frequency of 60Hz.