ASVAB Electronics Information Practice Test 841445 Results

Your Results Global Average
Questions 5 5
Correct 0 3.51
Score 0% 70%

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
1320 W
3600 W
1200 W
1201.5 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

All electricity is the movement of which subatomic particles?

89% Answer Correctly

nuclei

protons

electrons

neutrons
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.

3

Which of the following is not a characteristic of direct current?

47% Answer Correctly

cannot easily travel distances without power loss

an example power source is a generator

used to power your cell phone

electrons flow in only one consistent direction
Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of DC is a battery. In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.

4

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

one connection is made between each adjacent battery

the positive terminal of one battery is connected to the negative terminal of the next

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.

5

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

78% Answer Correctly

first

outer

inner

middle
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.