ASVAB Electronics Information Practice Test 794942 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.33
Score	0%	67%

Review

What kind of diode allows current to flow in the opposite direction once a certain voltage threshold is reached?

50% Answer Correctly

	zener diode
	standard diode
	light emitting diode
	v-type diode

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. A zener diode is a diode which allows current to flow in one direction as normal and will also allow current flow in the reverse direction when the voltage is above a certain value. This value is called the breakdown voltage.

You would measure the amount of voltage between two points in a circuit with a(n):

83% Answer Correctly

	voltmeter
	ammeter
	reostat
	battery

Solution

Voltage (V) is the electrical potential difference between two points. A voltmeter is used to measure the voltage between two points in a circuit.

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

61% Answer Correctly

	a rectifier strips out the AC portion of electricity while an inverter strips out the DC 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 DC portion of electricity while an inverter strips out the AC 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.

4 A circuit with a 120-volt power supply is protected by a 10-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	1080 W
	600 W
	400 W
	1200 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 10A circuit breaker would allow is 120V x 10A = 1200 W.

A solid state device has which of the following characteristics?

53% Answer Correctly

	made from a mix of conductive and insulative material
	made entirely from semiconductor material
	made entirely from insulative material
	made entirely from conductive material

Solution

The transistor is the foundation of modern electronic devices. It is made entirely from semiconductor material (making it a solid state device) and can serve many different functions in a circuit including acting as a switch, amplifier, or current regulator. A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.