ASVAB Electronics Information Practice Test 183043 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.15
Score	0%	63%

Review

A diode to an electronic circuit is like a _______________ to a city?

67% Answer Correctly

	parking lot
	traffic light
	one-way street
	highway

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction.

This circuit component symbol represents a(n):

57% Answer Correctly

	transformer
	DC source
	AC source
	capacitor

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.

3 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 70 volts?

80% Answer Correctly

	504 W
	565 W
	560 W
	840 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 8 amps (I) at 70 volts (V) so the equation becomes P = \( 70 \times 8 \) = 560 W

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

52% Answer Correctly

	total current equals the sum 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 average 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.

5 Suppose you have 4 [6V 20A] 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 4 batteries?

46% Answer Correctly

	12V 40A
	6V 80A
	24V 20A
	48V 160A

Solution

Connecting the 4 batteries in series multiplies their voltage while keeping their current the same yielding a 24V 20A configuration. Connecting the 4 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 80A configuration. Using a series-parallel connection, 2 batteries can be connected in series and 2 can be connected in parallel resulting in a 12V 40A configuration.