ASVAB Electronics Information Practice Test 61182 Results

	Your Results	Global Average
Questions	5	5
Correct	0	2.91
Score	0%	58%

Review

1 Suppose you have 8 [6V 25A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 8 batteries?

46% Answer Correctly

	6V 200A
	96V 400A
	48V 25A
	24V 100A

Solution

Connecting the 8 batteries in series multiplies their voltage while keeping their current the same yielding a 48V 25A configuration. Connecting the 8 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 200A configuration. Using a series-parallel connection, 4 batteries can be connected in series and 4 can be connected in parallel resulting in a 24V 100A configuration.

The formula specifying Ohm's law is which of the following?

77% Answer Correctly

	V = I²R
	\(V = {R \over I}\)
	V = IR
	\(V = {I \over R}\)

Solution

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

Which of the following is not a common type of battery?

41% Answer Correctly

	power-cycle
	deep-cycle
	wet cell
	dry cell

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 direct current (DC) is a battery. The three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).

4 How would you connect 6 [15V 10A] batteries to achieve a combined power output of 15V 60A?

52% Answer Correctly

	orthogonal
	series-parallel
	series
	parallel

Solution

Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 10A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yieleding a 15V 60A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 45V 30A configuration.

Which of the following statements about a capacitor is false?

77% Answer Correctly

	to discharge a capacitor safely, use a high-wattage resistor comparable to the capacitance of the capacitor
	a capacitor remains charged even after the input voltage is removed
	you should always discharge any capacitors before working on an electronic circuit
	it is safe to touch a capacitor with your hands as long as it is small

Solution

The purpose of a capacitor is to retain electric charge and it will do so even after its input voltage is removed. After the input voltage is removed, the capacitor will slowly discharge but, depending on the size and characteristics of the capacitor, discharging could take from a few minutes to a few years. So, it's never safe to touch a capacitor with your hands and you should make sure to discharge any capacitors in a circuit before working on it using an appropriately high-wattage resistor or a capacitor discharge tool.