ASVAB Electronics Information Practice Test 453189 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.42
Score	0%	68%

Review

1 What's the overall power consumption of a piece of equipment that is rated for 6 amps at 60 volts?

80% Answer Correctly

	360 W
	364 W
	361.5 W
	720 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 6 amps (I) at 60 volts (V) so the equation becomes P = \( 60 \times 6 \) = 360 W

What is the frequency of most household electrical systems?

59% Answer Correctly

	60Hz
	110Hz
	60MHz
	110V

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. Most households use electricity with a frequency of 60Hz.

Electrons will flow as current from areas of __________ potential (concentration of electrons) to areas of __________ potential.

74% Answer Correctly

	low, high
	high, low
	low, low
	high, high

Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.

The valence shell of a semiconductor is how full of electrons?

67% Answer Correctly

	half full
	empty
	more than half full
	less than 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.

5 How would you connect 10 [15V 25A] batteries to achieve a combined power output of 150V 25A?

53% Answer Correctly

	series-parallel
	series
	perpendicular
	orthogonal

Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 150V 25A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 15V 250A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 75V 125A configuration.