ASVAB Electronics Information Practice Test 4095 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.07
Score	0%	61%

Review

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

	eliminates
	decreases
	increases
	does nothing to

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 What's the overall power consumption of a piece of equipment that is rated for 9 amps at 80 volts?

80% Answer Correctly

	711 W
	720 W
	2160 W
	360 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 9 amps (I) at 80 volts (V) so the equation becomes P = \( 80 \times 9 \) = 720 W

If an electrical circuit is interrupted, which of the following will result?

61% Answer Correctly

	parallel circuit
	closed circuit
	short circuit
	open circuit

Solution

A closed circuit is a complete loop or path that electricity follows. It consists of a source of voltage, a load, and connective conductors. If the circuit is interrupted, if a wire is disconnected or cut for example, it becomes an open circuit and no electricity will flow.

Which of the following is not true about a line drop?

43% Answer Correctly

	it is addressed by raising voltage and lowering current across the transmission line
	it is a decrease in voltage between two points on a line
	it is addressed by raising current and lowering voltage across the ransmission line
	it is caused by resistance

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. A line drop is a decrease in voltage between two points on an electrical transmission line due to resistance in the line. A lower current and higher voltage across the line will help compensate for the line drop.

This circuit component symbol represents a(n):

60% Answer Correctly

	resistor
	inductor
	transformer
	capacitor

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.