Exam (elaborations)

Automotive Electronics Practice Test Questions and Correct Answers the Latest Update and Recommended Version

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Course
Automotive collision

Institution
Automotive Collision

A series circuit has three resistors of 4 ohms each. The voltage drop across each resistor is 4 volts. Technician A says that the source voltage is 12 volts. Technician B says that the total resistance is 18 ohms. Which technician is correct? Tech A Tech B Both Neither → Tech A A vehicl...

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Uploaded on October 19, 2024
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automotive electronics practice test questions and

Institution Automotive collision
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2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

Automotive Electronics Practice Test
Questions and Correct Answers the Latest
Update and Recommended Version
A series circuit has three resistors of 4 ohms each. The voltage drop across each resistor is 4

volts. Technician A says that the source voltage is 12 volts. Technician B says that the total

resistance is 18 ohms. Which technician is correct?

Tech A

Tech B

Both

Neither

→ Tech A

A vehicle has four parking lights all connected in parallel and one of the bulbs burns out.

Technician A says that this could cause the parking light fuse to blow (open). Technician B says

that it would decrease the current in the circuit. Which technician is correct?

Tech A

Tech B

Both

Neither

→ Tech B

As additional branches are added to a a parallel circuit, total circuit resistance ________.

Remains the same

1|Page| GradeA+ | 2 0 0 2 5

,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

Decreases

Increases

None of the above

→ Decreases

Calculate the total resistance and current in a 12-volt parallel circuit with three resistors of 4

ohms, 8 ohms, and 16 ohms, using any one of the five methods (calculator suggested). What

are the total resistance and current?

140 ohms (18 amps)

4 ohms (3.0 amps)

2.3 ohms (5.3 amps)

22 ohms (0.4 amps)

→ 2.3 ohms

If one branch of a parallel circuit loses continuity, the other branches will still each receive

source voltage and ground.

True

False

→ True

If the resistance and the voltage are known, what is the formula for finding the current

(amperes)?

I=ExR

1|Page| GradeA+ | 2 0 0 2 5

,2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

E=IxR

R=ExI

I=E/R

→ I=E/R

In a series circuit, total circuit resistance is equal to the ________ of the resistance of all loads

in the circuit.

Sum

Dividend

Difference

None of the Above

→ Sum

Kirchhoff's law states that the voltage around a closed circuit is equal to the sum of the

________ across all the loads.

Voltage drops

Resistances

Both A & B

Neither A nor B

→ Voltage drops

More electrical current will tend to flow through the branch of a parallel circuit with ________

resistance.

1|Page| GradeA+ | 2 0 0 2 5

, 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain Excel!

Infinite

Lowest

Highest

None of the Above

→ Lowest

Technician A says that electronic calculators have a memory function that can be used to

calculate resistance, current, and voltage values for a parallel circuit. Technician B says that

components of a series-parallel circuit are separated to simplify calculations. Which technician

is correct?

Tech A

Tech B

Both

Neither

→ Both

The amperage in a series circuit ________.

Is always less returning than leaving the battery.

Is the same anywhere in the circuit.

Is high at the beginning of the circuit and decreases as the current flows through the resistance.

Varies in the circuit due to the different resistances.

→ Is the same anywhere in the circuit.

1|Page| GradeA+ | 2 0 0 2 5

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Exam (elaborations)

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