ASVAB Electronics Information Practice Test 54229 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.34
Score	0%	67%

Review

This circuit component symbol represents a(n):

55% Answer Correctly

	inductor
	potentiometer
	fuse
	transformer

Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	does nothing to
	increases
	eliminates
	decreases

Solution

All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.

3 What's the overall power consumption of a piece of equipment that is rated for 2 amps at 60 volts?

80% Answer Correctly

	120 W
	240 W
	132 W
	122 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 2 amps (I) at 60 volts (V) so the equation becomes P = \( 60 \times 2 \) = 120 W

Capacitors are charged by what type of current?

64% Answer Correctly

	direct
	low voltage
	alternating
	high voltage

Solution

Capacitors store voltage and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.

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.