ASVAB Electronics Information Practice Test 571710 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.47
Score	0%	69%

Review

This circuit component symbol represents a(n):

57% Answer Correctly

	AC source
	transformer
	capacitor
	DC source

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.

Which of the following is a characteristic of batteries connected in parallel?

52% Answer Correctly

	total current equals the average of the individual battery currents
	one connection is made between each adjacent battery
	the positive terminal of one battery is connected to the negative terminal of the next
	total current equals the sum of the individual battery currents

Solution

You can multiply the voltage or the current supplied by individual batteries by connecting them together either in series or in parallel. The characteristics of batteries connected in parallel are that total voltage equals the average of the individual battery voltages, total current equals the sum of the individual battery currents, the positive terminal of one battery is connected to the positive terminal of the next, the negative terminal of one battery is connected to the negative terminal of the next, and two connections are made between each adjacent battery.

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?

84% Answer Correctly

	2401 W
	2640 W
	7200 W
	2400 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 valence shell of a semiconductor is how full of electrons?

67% Answer Correctly

	less than half full
	more than half full
	empty
	half full

Solution

Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.

Resistance is measured in:

86% Answer Correctly

	volts
	ohms
	amperes
	coulombs

Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.