Electrical Unit: Ultimate Practice Exam! Quiz

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Electrical Unit: Ultimate Practice Exam! Quiz

Are you preparing for an upcoming electrical unit exam? This quiz can serve as the preparation for the exam. As far as this quiz goes, you will see what the traditional automobile battery type is, which battery has removable cell covers, what a technician must always wear when working with a battery, and standard automotive network configurations. This enthralling quiz will help you study for the exam. Good luck.


Questions and Answers
  • 1. 
    _____________ is/are fundamental to the automobile.
    • A. 

      A 12-volt storage battery

    • B. 

      An engine starting system

    • C. 

      A charging system

    • D. 

      All of the above

  • 2. 
    The traditional automobile battery type is the:
    • A. 

      Lead acid.

    • B. 

      Ion.

    • C. 

      Helium.

    • D. 

      Nitrogen.

  • 3. 
    The nominal voltage of each cell of a battery is _____________ volts.
    • A. 

      1.9

    • B. 

      2.0

    • C. 

      2.1

    • D. 

      2.2

  • 4. 
    The following battery has removable cell covers.
    • A. 

      Sealed

    • B. 

      Maintenance free

    • C. 

      Lead acid flooded cell

    • D. 

      None of the above

  • 5. 
    A technician must always wear ______________ when working on a battery.
    • A. 

      Designer clothes

    • B. 

      Earrings

    • C. 

      Tennis shoes

    • D. 

      Safety glasses

  • 6. 
    Tech A says that batteries should be disposed of in landfills. Tech B says that batteries must be recycled. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 7. 
    Tech A says that the starter converts mechanical energy to electrical energy. Tech B says that the starter converts electrical energy to mechanical energy. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 8. 
    Tech A says that the alternator converts electrical energy into mechanical energy. Tech B says that the alternator converts mechanical energy into electrical energy. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 9. 
    The _____________ monitors battery voltage and varies current flow through the rotor field circuit.
    • A. 

      Slip rings

    • B. 

      Rotor

    • C. 

      Voltage regulator

    • D. 

      Armature

  • 10. 
    The process of converting alternating current (AC) into direct current (DC) is called:
    • A. 

      Rectification.

    • B. 

      Electromotive force (EMF).

    • C. 

      Counter-electromotive force (CEMF).

    • D. 

      Recertification.

  • 11. 
     The ______________ allows current to flow one way in the rectifier assembly.
    • A. 

      Diode

    • B. 

      Thyroid

    • C. 

      Electromotive force (EMF)

    • D. 

      Counter-electromotive force (CEMF)

  • 12. 
    Tech A says that to do a quick test on an alternator charging system is to remove one of the cables off the battery posts, and if the engine continues to run, then the charging system is good. Tech B says that the practice of removing a battery cable connection can damage the electronics on the vehicle. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 13. 
    On modern vehicles, what replaced the voltage regulator?
    • A. 

      Power train control module (PCM) or body control module (BCM)

    • B. 

      Electronic control module (ECM)

    • C. 

      Electromotive force (EMF)

    • D. 

      Counter-electromotive force (CEMF)

  • 14. 
    Tech A says that the standard 12-volt car battery has 3 cells with 4.2 volts in each cell. Tech B says that the standard 12-volt car battery has 4 cells with 3.3 volts each. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 15. 
    Tech A says that failure of a battery hold down can cause battery plate damage. Tech B says that a bungee cord is a suitable battery hold down. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 16. 
    CAN-bus is a _______-speed network.
    • A. 

      Medium

    • B. 

      High

    • C. 

      Low

    • D. 

      None of the above

  • 17. 
    Some networks transmit and receive signals over a single wire, but most have dual wires and are commonly called “CAN-bus high (H)” and “CAN-bus low (L),” with the same message sent on both lines.
    • A. 

      True

    • B. 

      False

  • 18. 
    All of the following are common automotive network configurations EXCEPT:
    • A. 

      Bussed parallel.

    • B. 

      Looped series.

    • C. 

      Star parallel.

    • D. 

      Triangle series.

  • 19. 
    Which of the following is not a diagnostic tool used in the testing of the controlled area network bus (CAN-bus) system?
    • A. 

      Data link connector (DLC) breakout box

    • B. 

      Digital volt-ohmmeter

    • C. 

      Network converter

    • D. 

      Digital storage oscilloscope

  • 20. 
    Which of the following may be required when diagnosing and repairing a vehicle's electronic modules?
    • A. 

      Software transfers

    • B. 

      Flash reprogramming

    • C. 

      Software updates

    • D. 

      All of the above

  • 21. 
    The horn switch is usually mounted in the steering wheel and requires a method to maintain an electrical connection to the circuit as the steering wheel rotates. This connection is called a:
    • A. 

      Slot spring.

    • B. 

      Swivel switch.

    • C. 

      Clock spring.

    • D. 

      Diaphragm.

  • 22. 
    If only the intermittent speed setting on the windshield wipers is not working, it may be caused by a faulty:
    • A. 

      Fuse.

    • B. 

      Delay module.

    • C. 

      Motor brush.

    • D. 

      Switch.

  • 23. 
    Tech A says higher-speed networks are used for critical data such as supplemental restraint systems, anti-lock brake systems, and engine controls. Tech B says lower-speed networks are used for lower priority data such as data related to entertainment systems. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 24. 
    Tech A says the CAN-bus system has a data link connector (DLC) that provides a connection into the data network and allows scan tools to connect into the network. Tech B says when there is an issue with the CAN-bus system, a diagnostic trouble code (DTC) with an “N” designation will typically be set, indicating the nature of the fault. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

  • 25. 
    Tech A says that the horn circuit can fail in many ways. Any of the components in the circuit can go bad, as can the wiring. Tech B says when testing the horn, it may be easiest to first see if power is getting to the horn when it is activated, because it is not uncommon for horns to go bad, especially if they are rarely used or overused. Who is correct?
    • A. 

      Tech A

    • B. 

      Tech B

    • C. 

      Both Techs A and B

    • D. 

      Neither Tech A nor B

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