Microwaves - 15 Questions

15 Questions | Total Attempts: 63

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Electronics Quizzes & Trivia

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Questions and Answers
  • 1. 
    When cooking food, microwaves ______________ 
    • A. 

      Diodes to stop RF noise.

    • B. 

      Heat from the inside out.

    • C. 

      Operate at 2450 mhz.

    • D. 

      Use convection to heat food.

  • 2. 
    A microwave that doesn't heat but draws 1 amp or less
    • A. 

      Most likely has a problem in the high voltage.

    • B. 

      Has a shorted diode.

    • C. 

      Has an open capacitor.

    • D. 

      Has no power to the high voltage transformer.

  • 3. 
    The switches that are in the safety interlock are
    • A. 

      Normally closed.

    • B. 

      Always grey.

    • C. 

      Called primary, monitor, and high voltage.

    • D. 

      Called primary, secondary, and monitor.

  • 4. 
    The best way to test a microwave high voltage diode ________.
    • A. 

      Is to measure voltage.

    • B. 

      Is to check current draw.

    • C. 

      Is to always replace the diode and the capacitor.

    • D. 

      Is to use an analog meter with an internal 9-volt battery set on Rx10K.

  • 5. 
    A microwave oven with an open line fuse
    • A. 

      Will run hot, but not heat.

    • B. 

      Will heat on low.

    • C. 

      Will do nothing at all.

    • D. 

      Has a shorted magnetron.

  • 6. 
    The four components contained in the high voltage area are
    • A. 

      Thermal fuse, magnetron, primary switch, and monitor switch.

    • B. 

      Magnetron, high voltage transformer, diode, and capacitor.

    • C. 

      Only has (2): capacitor and diode.

    • D. 

      Diode, triac, transformer, and magnetron.

  • 7. 
    What is the first thing to do when checking a turntable motor that isn't running?
    • A. 

      Unplug and discharge the capacitor.

    • B. 

      Disconnect power and check ohms of motor.

    • C. 

      Check for the correct power at the motor.

    • D. 

      Check relay on the board.

  • 8. 
    The interlock monitor switch _____________
    • A. 

      Must be open when door is open.

    • B. 

      Must be closed when door is open.

    • C. 

      Must be closed when door is closed.

    • D. 

      Is activated by the high voltage transformer.

  • 9. 
    A microwave that is heating ____________
    • A. 

      Will boil a cup of water in one minute.

    • B. 

      Will draw 6 amps or less.

    • C. 

      Will draw at least 9.5 amps.

    • D. 

      Will draw no more than 8 amps.

  • 10. 
    When the internal line fuse is blown, it may be caused by ____________
    • A. 

      A failed monitor switch.

    • B. 

      The primary switch stuck closed.

    • C. 

      A shorted capacitor.

    • D. 

      Both A & C are correct.

  • 11. 
    Identify this part found in a microwave.
    • A. 

      Transformer

    • B. 

      Diode

    • C. 

      Magnetron

    • D. 

      Capacitor

  • 12. 
    Identify this part found in a microwave.
    • A. 

      Transformer

    • B. 

      Diode

    • C. 

      Magnetron

    • D. 

      Capacitor

  • 13. 
    Identify this part found in a microwave.
    • A. 

      Transformer

    • B. 

      Diode

    • C. 

      Magnetron

    • D. 

      Capacitor

  • 14. 
    Identify this part found in a microwave.
    • A. 

      Transformer

    • B. 

      Diode

    • C. 

      Magnetron

    • D. 

      Capacitor

  • 15. 
    A microwave cooks from the inside out.
    • A. 

      True

    • B. 

      False

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