ASVAB Electronics Information Practice Test 347465 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.45
Score	0%	69%

Review

1 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 20 volts?

80% Answer Correctly

	157 W
	144 W
	176 W
	160 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 8 amps (I) at 20 volts (V) so the equation becomes P = \( 20 \times 8 \) = 160 W

A diode to an electronic circuit is like a _______________ to a city?

67% Answer Correctly

	parking lot
	highway
	one-way street
	traffic light

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction.

Which of the following is a characteristic of batteries connected in parallel?

52% Answer Correctly

	total current equals the sum of the individual battery currents
	the positive terminal of one battery is connected to the negative terminal of the next
	one connection is made between each adjacent battery
	total current equals the average of the individual battery currents

Solution

You can multiply the voltage or the current supplied by individual batteries by connecting them together either in series or in parallel. The characteristics of batteries connected in parallel are that total voltage equals the average of the individual battery voltages, total current equals the sum of the individual battery currents, the positive terminal of one battery is connected to the positive terminal of the next, the negative terminal of one battery is connected to the negative terminal of the next, and two connections are made between each adjacent battery.

Which of the following statements about a capacitor is false?

77% Answer Correctly

	to discharge a capacitor safely, use a high-wattage resistor comparable to the capacitance of the capacitor
	it is safe to touch a capacitor with your hands as long as it is small
	you should always discharge any capacitors before working on an electronic circuit
	a capacitor remains charged even after the input voltage is removed

Solution

The purpose of a capacitor is to retain electric charge and it will do so even after its input voltage is removed. After the input voltage is removed, the capacitor will slowly discharge but, depending on the size and characteristics of the capacitor, discharging could take from a few minutes to a few years. So, it's never safe to touch a capacitor with your hands and you should make sure to discharge any capacitors in a circuit before working on it using an appropriately high-wattage resistor or a capacitor discharge tool.

What is the primary difference between a rectifier and an inverter?

61% Answer Correctly

	a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion
	a rectifier converts a DC input to AC while an inverter converts an AC input to DC
	a rectifier converts an AC input to DC while an inverter converts a DC input to AC
	a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.