ASVAB Electronics Information Practice Test 91709 Results

Your Results Global Average
Questions 5 5
Correct 0 3.73
Score 0% 75%

Review

1 Use Ohm's Law to calculate the value of current in this circuit if voltage is 800 volts and resistance is 100 Ω.
81% Answer Correctly
8 A
14 A
8.8 A
16 A
Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Solved for current, I = \( \frac{V}{R} \) = \( \frac{800}{100} \) = 8 A

2

In household electrical wiring, which color of insulation indicates the 'hot' wire?

50% Answer Correctly

white

black

red

green
Solution

In the NM cable used for wiring homes, each cable has three wires inside a sheath with each wire covered in a different color of insulation to indicate its type. The wire with the black insulation is the 'hot' wire, white is the neutral wire, and the ground wire is either covered in green insulation or left bare.

3

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

78% Answer Correctly

middle

inner

first

outer
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.

4 What's the overall power consumption of a piece of equipment that is rated for 2 amps at 10 volts?
85% Answer Correctly
21 W
20 W
10 W
23 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
5

Which of the following is the formula for calculating electrical power?

73% Answer Correctly

\(P = {I \over V}\)

\(P = {V \over I}\)

P = I2V

P = IV
Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.