Vehicle Electrical & Electronic Diagnosis Quiz

16 Questions | Total Attempts: 288

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Electrical Quizzes & Trivia

A quick quiz to re-cap on the fundamental elements of diagnosis terms and procedures including some units of measurement, multimeter use, scope patterns and common abbrieviations


Questions and Answers
  • 1. 
    Which of the following statements is correct?
    • A. 

      Flemings Left hand rule relates to motors

    • B. 

      Flemings Right hand rule relates to motors

    • C. 

      Faradays Left hand rule relates to motors

    • D. 

      Faradays Right hand rule relates to motors

  • 2. 
    Fleming's Right Hand Rule relates to which component type?
    • A. 

      Solenoids

    • B. 

      Motors

    • C. 

      Generators

    • D. 

      Actuators

  • 3. 
    What is the unit of electrical frequency?
    • A. 

      Hall

    • B. 

      Watts

    • C. 

      Hurts

    • D. 

      Hertz

  • 4. 
    What does NTC stand for?
    • A. 

      Negative temporal coefficient

    • B. 

      Negative Temperature Coefficient

    • C. 

      Normal thermal coefficient

    • D. 

      Normal Temperature Coefficient

  • 5. 
    If the resistance increases as the temperature increases what could this be refferred to as....
    • A. 

      Physical Temperature Change

    • B. 

      Positive Temperature Change

    • C. 

      Positive Temporal Coefficient

    • D. 

      Positive Temperature Coefficient

  • 6. 
    In relation to an inductive type AC sensor which statement is correct?
    • A. 

      As wheel speed increases the resistance level increases and current flow is reduced

    • B. 

      As wheel speed increases frequency increases and amplitude increases

    • C. 

      As wheel speed increases frequency increases but amplitude decreases

    • D. 

      As wheel speed increase frequency decreases and amplitude increases

  • 7. 
    What does PWM stand for?
    • A. 

      Pulse Wide Mode

    • B. 

      Phased Width Modulation

    • C. 

      Pulse Width Modulation

    • D. 

      Pulse Wide Modulation

  • 8. 
    A digital signal would give you what type of pattern if checked with a scope?
    • A. 

      Square Wave

    • B. 

      Saw Tooth

    • C. 

      Sine Wave

    • D. 

      You can't test it with a scope just a resistance check

  • 9. 
    If a vehicle had a high resistance in the lighting earth circuit what effect would this have on their operation?
    • A. 

      The lamp/lamps would not light up at all

    • B. 

      The bulbs would blow due to the proportional increase in current flow

    • C. 

      The current flow would be decreased proportionally and as such the lamp would glow dimly

    • D. 

      This would have no visible effect

  • 10. 
    When testing an electrical circuit using a multimeter how would you test the resistance of a component or wire?
    • A. 

      Disconnect the power supply, isolate the component or wire and set the multimeter to Ohms test in series

    • B. 

      Disconnect the power supply, isolate the component or wire and set the multimeter to Ohms test in parallel

    • C. 

      Connect the multimeter across the component or wire and test in parallel

    • D. 

      Connect the multimeter in series with the component or wire with the multimeter set to amps

  • 11. 
    When testing for a parasitic drain which of the following is the most practical?
    • A. 

      Ignition off disconnect the battery earth and connect an ammeter in series

    • B. 

      Set the meter to Amps and connect across the battery termonal in parallel

    • C. 

      Connect the meter in parallel with the circuit with the battery disconnected

    • D. 

      Connect the meter in series between the positive terminal and the positive lead but keep the negative lead disconnected

  • 12. 
    When checking for voltage drop how should you connect your meter?
    • A. 

      In series with the component and the power supply on

    • B. 

      In parallel with the component with the power supply off

    • C. 

      In series with the component and the power supply off

    • D. 

      In parallel with the component and the power supply on

  • 13. 
    When using a scope what do the X and Y axis represent?
    • A. 

      Y is horizontal and represents the amplitude/voltage X is vertical and represent Frequency/timescale

    • B. 

      X goes across/Horizontal and represents the timescale and the Y axis goes up and down/vertical and represents the amplitude/voltage

    • C. 

      X is horizontal and represents the amplitude/voltage Y is vertical and represent Frequency/timescale

    • D. 

      Y goes across/Horizontal and represents the timescale and the X axis goes up and down/vertical and represents the amplitude/voltage

  • 14. 
    What component acts as an electrical one way valve until a certain voltage is breached then allows the current to flow in either direction. The componen resets itself once the voltage drops below its threhold again?
    • A. 

      Circuit Breaker

    • B. 

      Diode

    • C. 

      Transistor

    • D. 

      Zener Diode

  • 15. 
    When testing a circuit with a voltmeter what is the rule of thumb for a maximum permitted volt drop on a feed/supply wire?
    • A. 

      Within 2.5 Volts of battery voltage

    • B. 

      0.5 Volts

    • C. 

      Within 1 volt of battery voltage

    • D. 

      12.6 Volts

  • 16. 
    How would you test for current flow in a vehicle circuit?
    • A. 

      Ignition off disconnect the battery earth and connect an ammeter in series

    • B. 

      Ignition off disconnect the battery earth and connect an ammeter in parallel

    • C. 

      Ignition on connect the ammeter in parallel across the battery terminals

    • D. 

      Ignition off disconnect the battery and connect the ammeter in series

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