ASVAB Electronics Information Practice Test 577000 Results

Your Results Global Average
Questions 5 5
Correct 0 3.76
Score 0% 75%

Review

1 A circuit with a 120-volt power supply is protected by a 15-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?
84% Answer Correctly
1980 W
1800 W
1803 W
1806 W
Solution
Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 15A circuit breaker would allow is 120V x 15A = 1800 W.
2

In a series circuit, which of the following is the same across all branches of the circuit?

61% Answer Correctly

conductance

current

voltage

resistance
Solution

A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.

3 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 140 volts?
85% Answer Correctly
3360 W
1119 W
1122 W
1120 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 140 volts (V) so the equation becomes P = \( 140 \times 8 \) = 1120 W
4

What is the voltage of most household electrical systems in the United States?

59% Answer Correctly

60V

220V

60Hz

110V
Solution

Most households use electricity with a voltage of 110V.

5 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 810 volts and current is 9 amps.
81% Answer Correctly
91.5 Ω
90 Ω
81 Ω
180 Ω
Solution

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

Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{810}{9} \) = 90 Ω