ASVAB Electronics Information Practice Test 697306 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.57
Score	0%	71%

Review

1 A circuit with a 120-volt power supply is protected by a 25-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	3000 W
	1000 W
	2700 W
	4500 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 25A circuit breaker would allow is 120V x 25A = 3000 W.

What type of current flows in only one direction in a circuit?

82% Answer Correctly

	alternating
	direct
	parallel
	series

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 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 10 Ω and current is 0.5 amps.

85% Answer Correctly

	2.5 V
	5 V
	3 V
	9 V

Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

V = \( I \times R \) = \( 0.5 \times 10 \) = 5 V

This circuit component symbol represents a(n):

65% Answer Correctly

	DC source
	AC source
	transistor
	transformer

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 true about a line drop?

43% Answer Correctly

	it is addressed by raising voltage and lowering current across the transmission line
	it is caused by resistance
	it is a decrease in voltage between two points on a line
	it is addressed by raising current and lowering voltage across the ransmission line

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. A line drop is a decrease in voltage between two points on an electrical transmission line due to resistance in the line. A lower current and higher voltage across the line will help compensate for the line drop.