ASVAB Electronics Information Practice Test 631991 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.21
Score	0%	64%

Review

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	decreases
	eliminates
	does nothing to
	increases

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.

2 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

	600 W
	595 W
	602 W
	1200 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.

An amplifier is most similar in function to which of the following:

65% Answer Correctly

	step-down transformer
	capacitor
	step-up transformer
	transistor

Solution

An amplifier is a device that takes a small input signal and creates a larger output signal. This makes it most similar to a step-up transformer which takes a smaller input voltage and creates a larger output voltage.

Electricity cannot flow...

72% Answer Correctly

	through an open circuit
	through a circuit under load
	through a closed circuit
	through a circuit with resistance

Solution

An electrical circuit is a path through which electricity flows. This path contains one or more components that create a load (something that is using electricity) and that load acts as resistance to the passage of electricity through the circuit. Electricity can only flow through a circuit when the path is closed and cannot flow through an open circuit.

General current flow in a transistor is from __________ to __________.

51% Answer Correctly

	collector, base
	base, collector
	collector, emitter
	base, emitter

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.