ASVAB Electronics Information Practice Test 483046 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.60
Score	0%	72%

Review

1 A circuit with a 120-volt power supply is protected by a 5-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	603 W
	300 W
	601.5 W
	600 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 5A circuit breaker would allow is 120V x 5A = 600 W.

What is the primary difference between a rectifier and an inverter?

61% Answer Correctly

	a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion
	a rectifier converts a DC input to AC while an inverter converts an AC input to DC
	a rectifier converts an AC input to DC while an inverter converts a DC input to AC
	a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.

3 How would you connect 10 [15V 10A] batteries to achieve a combined power output of 75V 50A?

66% Answer Correctly

	orthogonal
	series
	parallel
	series-parallel

Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 150V 10A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 15V 100A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 75V 50A configuration.

Which of the following statements about electrical resistance is true?

74% Answer Correctly

	electrically conductive materials have no resistive properties
	the more resistive the conductor is the slower electron flow will be
	the more resistive the conductor is the faster electron flow will be
	the less resistive the conductor is the slower electron flow will be

Solution

Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.

Electrical power is measured in:

74% Answer Correctly

	coulombs
	amperes
	watts
	volts

Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.