ASVAB Electronics Information Practice Test 874430 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.53
Score	0%	71%

Review

Which of the following is a difference between a circuit breaker and a fuse?

80% Answer Correctly

	a circuit breaker can be reused
	all of these
	a fuse is cheaper than a circuit breaker
	a fuse responds more quickly than a circuit breaker

Solution

Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.

2 What's the overall power consumption of a piece of equipment that is rated for 5 amps at 90 volts?

92% Answer Correctly

	675 W
	450 W
	150 W
	405 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 5 amps (I) at 90 volts (V) so the equation becomes P = \( 90 \times 5 \) = 450 W

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

A transformer utilizes an inductor to increase or decrease what in a circuit?

61% Answer Correctly

	current
	voltage
	load
	resistance

Solution

A transformer utilizes an inductor to increase or decrease the voltage in a circuit. AC flowing in a coil wrapped around an iron core magnetizes the core causing it to produce a magnetic field. This magnetic field generates a voltage in a nearby coil of wire and, depending on the number of turns in the wire of the primary (source) and secondary coils and their proximity, voltage is induced in the secondary coil.

An engineer who wants to document an electric circuit would create which of the following?

67% Answer Correctly

	a layout
	a matrix
	a blueprint
	a schematic

Solution

A schematic is the proper name for a drawing of an electric or electronic circuit.