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Automotive Electronics Practice Test Questions and Answers

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Automotive Electronics Practice Test Questions and Answers 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 co...

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  • October 15, 2024
  • 33
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Automotive
  • Automotive
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Emillect
EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024




Automotive Electronics Practice Test
Questions and Answers

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 - Answer✔✔-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 - Answer✔✔-Tech B



Page 1/33

,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


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


Remains the same


Decreases


Increases


None of the above - Answer✔✔-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) - Answer✔✔-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 - Answer✔✔-True


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

(amperes)?


Page 2/33

,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


I=ExR


E=IxR


R=ExI


I = E / R - Answer✔✔-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 - Answer✔✔-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 - Answer✔✔-Voltage drops


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

resistance.


Page 3/33

, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER, 2024


Infinite


Lowest


Highest


None of the Above - Answer✔✔-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 - Answer✔✔-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. - Answer✔✔-Is the same anywhere in the

circuit.


Page 4/33

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