ASVAB Electronics Information Practice Test 381910 Results

Your Results Global Average
Questions 5 5
Correct 0 3.05
Score 0% 61%

Review

1

Using a fuse with a current rating higher than that required by a circuit:

70% Answer Correctly

is required

is recommended

makes the circuit less safe

makes no difference
Solution

A fuse is a type of low resistance resistor that stops current flow in a circuit in response to a larger than intended electric current flow. Using a fuse with a higher current rating than required by a circuit is less safe as it could potentially allow overcurrent and risk a fire or heat-related equipment damage.

2

An amplifier is most similar in function to which of the following:

65% Answer Correctly

capacitor

step-down transformer

step-up transformer

transistor
Solution

An amplifier is a device that takes a small input signal and creates a larger output signal. This makes it most similar to a step-up transformer which takes a smaller input voltage and creates a larger output voltage.

3 Suppose you have 10 [9V 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 10 batteries?
46% Answer Correctly
9V 250A
45V 125A
90V 25A
180V 500A
Solution

Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 90V 25A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 9V 250A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 45V 125A configuration.

4

In metals, increasing the temperature typically _____________ conductivity.

50% Answer Correctly

eliminates

increases

decreases

does nothing to
Solution

All conductors have resistance and the amount of resistance varies with the element. Metals exhibit increased resistance (and, therefore, lower conductivity) as their temperature increases.

5

Which of the following statements about electrical resistance is true?

74% Answer Correctly

the more resistive the conductor is the slower electron flow will be

the less resistive the conductor is the slower electron flow will be

electrically conductive materials have no resistive properties

the more resistive the conductor is the faster electron flow will be
Solution

Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.