ASVAB Electronics Information Practice Test 824908 Results

Your Results Global Average
Questions 5 5
Correct 0 3.81
Score 0% 76%

Review

1 A circuit with a 120-volt power supply is protected by a 10-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?
82% Answer Correctly
1192 W
1200 W
1320 W
1080 W
Solution
Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 10A circuit breaker would allow is 120V x 10A = 1200 W.
2

Resistance is measured in:

86% Answer Correctly

coulombs

ohms

volts

amperes
Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.

3

Longer the electrical wires mean _______________ voltage drop.

73% Answer Correctly

complete

diminishing

lesser

greater
Solution

Electrical wires have a certain amount of resistance per foot. A longer wire means more resistance and a greater voltage drop.

4

In an electrical circuit, resistors have fixed or __________ resistance.

69% Answer Correctly

dynamic

parallel

series

variable
Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance.  Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

5

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

69% Answer Correctly

coulombs

amperes

ohms

volts
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.