ASVAB Electronics Information Practice Test 977173 Results

Your Results Global Average
Questions 5 5
Correct 0 3.17
Score 0% 63%

Review

1

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

59% Answer Correctly

60V

220V

110V

60Hz
Solution

Most households use electricity with a voltage of 110V.

2

Which of the following allows current to pass easily in one direction and blocks current in the other direction?

69% Answer Correctly

capacitor

resistor

diode

inductor
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.

3 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 20 Ω and current is 4 amps.
85% Answer Correctly
26.67 V
82 V
84 V
80 V
Solution

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

V = \( I \times R \) = \( 4 \times 20 \) = 80 V

4 How would you connect 10 [12V 10A] batteries to achieve a combined power output of 12V 100A?
51% Answer Correctly
series
perpendicular
series-parallel
parallel
Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 120V 10A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 100A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 60V 50A configuration.

5 How would you connect 4 [12V 15A] batteries to achieve a combined power output of 48V 15A?
53% Answer Correctly
series
series-parallel
perpendicular
parallel
Solution

Connecting the 4 batteries in series multiplies their voltage while keeping their current the same yielding a 48V 15A configuration. Connecting the 4 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 12V 60A configuration. Using a series-parallel connection, 2 batteries can be connected in series and 2 can be connected in parallel resulting in a 24V 30A configuration.