Prime Movers

65 Questions | Total Attempts: 145

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Transport Quizzes & Trivia

Aerospace Ground Equipment Journeyman


Questions and Answers
  • 1. 
    (404) To reverse the direction of rotation of a three-phase inductive motor, you must reverse
    • A. 

      All three phases

    • B. 

      Any two power leads

    • C. 

      A and B phases only

    • D. 

      B and C phases only

  • 2. 
    (401) What opposes the applied voltage in direct current (DC) motors?
    • A. 

      Couter electromotive force (CEMF)

    • B. 

      Output power

    • C. 

      Horsepower

    • D. 

      Torque

  • 3. 
    (403) To operate a single-phase induction motor requires that it has
    • A. 

      Brushes

    • B. 

      Slip rings

    • C. 

      A commutator

    • D. 

      Starting system

  • 4. 
    (404)The three-phase induction motor does not require
    • A. 

      Slip

    • B. 

      A rotor

    • C. 

      A stator

    • D. 

      A starting device

  • 5. 
    (401) What provides contact between the stationary and rotating parts of a motor?
    • A. 

      Field windings

    • B. 

      Commutator

    • C. 

      Bearings

    • D. 

      Brushes

  • 6. 
    (406) During an inspection of a direct current (DC) motor, check the brushes for
    • A. 

      Pitting

    • B. 

      Seating

    • C. 

      Coloration

    • D. 

      Spring pressure

  • 7. 
    (403) Which induction motor has the highest starting torque?
    • A. 

      Capacitive-start

    • B. 

      Squirrel-cage

    • C. 

      Shaded-pole

    • D. 

      Split-phase

  • 8. 
    (405) The speed of a synchronous motor is controlled by the
    • A. 

      Load

    • B. 

      Torque

    • C. 

      Input frequency

    • D. 

      Armature current

  • 9. 
    (406) Which component is one of the major causes of failure in the direct current (DC) motor?
    • A. 

      Commutator

    • B. 

      Slip rings

    • C. 

      Bearings

    • D. 

      Rotor

  • 10. 
    (402) In a series-wound direct current (DC) motor, speed is dependent on the
    • A. 

      Load

    • B. 

      Torque

    • C. 

      Armature

    • D. 

      Field winding

  • 11. 
    (408) Perform a operational check of the unit
    • A. 

      At the last minute

    • B. 

      With the defective part removed

    • C. 

      Before final reassembly of the enclosure

    • D. 

      As soon as you replace the defective part

  • 12. 
    (406) When you check the concentricity of a commutator or slip rings, look for
    • A. 

      Wear

    • B. 

      Pitting

    • C. 

      Roundness

    • D. 

      Overheating

  • 13. 
    (407) Which of the following is not listed in a troubleshooting chart?
    • A. 

      Analysis

    • B. 

      Remedies

    • C. 

      Symptoms

    • D. 

      Probable causes

  • 14. 
    (409) What controls the amount of fuel injected when constant-stroke fuel injection pumps are used?
    • A. 

      Injector

    • B. 

      Control rack

    • C. 

      Delivery valve

    • D. 

      Revolving disk

  • 15. 
    (407) When you troubleshoot a motor, you should first perform a
    • A. 

      Voltage check

    • B. 

      Continuity test

    • C. 

      Visual inspection

    • D. 

      Current measurement

  • 16. 
    (407) You can do most troubleshooting on a motor by using a
    • A. 

      Megger

    • B. 

      Growler

    • C. 

      Multimeter

    • D. 

      Clamp-on ammeter

  • 17. 
    (408) When you clean motors, the component most likely to be damaged by cleaning solvents is the
    • A. 

      Brushes

    • B. 

      Bearings

    • C. 

      Slip rings

    • D. 

      Commutator

  • 18. 
    (410) A lubricant performs which function when it deposits particles of dirt in the oil sump?
    • A. 

      Cooling

    • B. 

      Sealing

    • C. 

      Cleaning

    • D. 

      Reducing friction

  • 19. 
    (410) Which function does a lubricant perform by constantly circulating past the air that surrounds the oil sump?
    • A. 

      Cooling

    • B. 

      Sealing

    • C. 

      Cleaning

    • D. 

      Reducing friction

  • 20. 
    (408) In component removal, if wires are to be soldered, do not
    • A. 

      Cut tem, but remove the wiring intact

    • B. 

      Resolder them until they have been bench checked

    • C. 

      Resolder them until all wiring has been replaced with new wires

    • D. 

      Cut them unless there is a sufficient length remaining for resoldering

  • 21. 
    (409) What kind of pumps are injection pumps also called?
    • A. 

      Control

    • B. 

      Metering

    • C. 

      Pressure

    • D. 

      Mechanical

  • 22. 
    (415) What is the allowable deviation between cylinders during a compression test?
    • A. 

      25 psi

    • B. 

      50 psi

    • C. 

      75 psi

    • D. 

      100 psi

  • 23. 
    (410) When a lubricant reduces friction, it also reduces
    • A. 

      Heat

    • B. 

      Wear

    • C. 

      Resistance

    • D. 

      All of the above

  • 24. 
    (409) What is used on the constant-stroke pump plunger to determine the amount of fuel that is delivered?
    • A. 

      Bypass port

    • B. 

      Vertical slot

    • C. 

      Helical groove

    • D. 

      Delivery valve

  • 25. 
    (424) Common or frequently occurring troubles in a unit, their causes, and remedies may be found in the
    • A. 

      Historical record

    • B. 

      Maintenance record

    • C. 

      Troubleshooting chart

    • D. 

      Illustrated parts breakdown