ASVAB Electronics Information Practice Test 894956 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.47
Score	0%	69%

Review

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

52% Answer Correctly

	more than half full
	less than half full
	half full
	full

Solution

Conductors are elements that allow electrons to flow freely. Their valence shell is less than half full of electrons that are able to move easily from one atom to another.

2 What's the overall power consumption of a piece of equipment that is rated for 5 amps at 110 volts?

80% Answer Correctly

	550 W
	825 W
	552 W
	275 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 5 amps (I) at 110 volts (V) so the equation becomes P = \( 110 \times 5 \) = 550 W

Silver and gold are among the most highly conductive elements. Why is copper used much more often as a conductor in electrical circuits?

80% Answer Correctly

	silver and gold are costly
	copper is durable and relatively cheap
	all of these
	silver and gold are brittle

Solution

All conductors have resistance and the amount of resistance varies with the element. But, resistance isn't the only consideration when choosing a conductor as the most highly conductive elements like silver and gold are also more expensive and more brittle than slightly less conductive elements like copper. A balance needs to be struck between the electrical qualities of a material and its cost and durability.

Current is the rate of flow of electrons per unit time and is measured in:

69% Answer Correctly

	amperes
	coulombs
	volts
	ohms

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.

What is the frequency of most household electrical systems?

59% Answer Correctly

	60Hz
	110Hz
	60MHz
	110V

Solution

Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances. Most households use electricity with a frequency of 60Hz.