ASVAB Electronics Information Practice Test 703727 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.30
Score	0%	66%

Review

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

67% Answer Correctly

	more than half full
	less than half full
	empty
	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.

In an electronic circuit, a thermocouple can be used to:

42% Answer Correctly

	increase or decrease the temperature of a component in the circuit
	keep the circuit at a designated safe temperature
	open or close a circuit at a designated temperature
	link the temperature of one component in the circuit to that of another component in the circuit

Solution

A thermocouple is a temperature sensor that consists of two wires made from different conductors. The junction of these two wires produces a voltage based on the temperature difference between them and can be used like a switch to open or close the circuit at a designated temperature.

The hertz is a unit of measurement for:

81% Answer Correctly

	energy
	frequency
	power
	inductance

Solution

The hertz is a unit of measurement for frequency.

This circuit component symbol represents a(n):

60% Answer Correctly

	capacitor
	resistor
	inductor
	transformer

Solution

An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.

You would measure the amount of resistance at a certain point in a circuit with a(n):

78% Answer Correctly

	ammeter
	voltmeter
	potentiometer
	ohmmeter

Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.