ASVAB Electronics Information Practice Test 423756 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.46
Score	0%	69%

Review

The conductivity of an element depends on how many electrons occupy which electron shell?

78% Answer Correctly

	first
	middle
	outer
	inner

Solution

All electricity is the movement of electrons which are subatomic particles that orbit the nucleus of an atom. Electrons occupy various energy levels called shells and how well an element enables the flow of electrons depends on how many electrons occupy its outer (valence) electron shell.

2 What's the overall power consumption of a piece of equipment that is rated for 2 amps at 10 volts?

80% Answer Correctly

	21.5 W
	24 W
	30 W
	20 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 10 volts (V) so the equation becomes P = \( 10 \times 2 \) = 20 W

Which of the following is not a characteristic of a step-up transformer?

54% Answer Correctly

	increases voltage
	the primary voltage is higher than the secondary voltage
	has more turns in the secondary winding than in the primary winding
	the secondary voltage is higher than the primary voltage

Solution

As their names indicate, a step-up transformer is used to step up or increase voltage and a step-down transformer is used to step down or decrease voltage. In a step-up transformer, the secondary voltage is higher than the primary voltage and it has more turns in the secondary winding than in the primary winding.

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

42% Answer Correctly

	link the temperature of one component in the circuit to that of another component in the circuit
	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

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.

What type of current flows in only one direction in a circuit?

82% Answer Correctly

	alternating
	parallel
	series
	direct

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery.