CDC 2A652 Age (Vol 3)

85 Questions | Total Attempts: 4107

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2A652 Quizzes & Trivia

URE's for CDC Vol 3 for Aerospace Ground Equipment


Questions and Answers
  • 1. 
    Which component is one of the major causes of failure in the DC motor?
    • A. 

      Commutator

    • B. 

      Slip rings

    • C. 

      Bearings

    • D. 

      Rotor

  • 2. 
    During operation of the EPU-6/E frequency converter the operator determine that one phase voltage is lower than the other two phases. What could cause this malfunction?
    • A. 

      Malfunctioning transistor

    • B. 

      Improper SCR firing adjustment

    • C. 

      Burnt control transformer fuse

    • D. 

      Loose push-on connector on the output filter capacitor

  • 3. 
    Which induction motor has the highest starting torque?
    • A. 

      Capacitive-start

    • B. 

      Squirrel cage

    • C. 

      Shaded pole

    • D. 

      Split-phase

  • 4. 
    When you check the concentricity of a commutator of slip rings, look for
    • A. 

      Wear

    • B. 

      Pitting

    • C. 

      Roundness

    • D. 

      Overheating

  • 5. 
    One advantage of the three-phase induction motor over a comparable single-phase unit is 
    • A. 

      Lower voltage requirement

    • B. 

      High starting torque

    • C. 

      A higher speed

    • D. 

      Less weight

  • 6. 
    After shutdown a motor continues turning; this is known as
    • A. 

      Inertia

    • B. 

      Impedance

    • C. 

      Inductance

    • D. 

      Eddy currents

  • 7. 
    In a series-wound DC motor, speed is controlled by the 
    • A. 

      Load

    • B. 

      Torque

    • C. 

      Armature

    • D. 

      Field winding

  • 8. 
    The three-phase induction motor does not require
    • A. 

      Slip

    • B. 

      A rotor

    • C. 

      A stator

    • D. 

      A starting device

  • 9. 
    Torque is defined as
    • A. 

      Horsepower

    • B. 

      Wattage

    • C. 

      Rotational force

    • D. 

      Opposition to applied voltage

  • 10. 
    The stator windings of a synchronous motor are wound
    • A. 

      20 degrees apart

    • B. 

      30 degrees apart

    • C. 

      90 degrees apart

    • D. 

      120 degrees apart

  • 11. 
    When using a troubleshooting chart, what are you not likely to find?
    • A. 

      Analysis

    • B. 

      Remedies

    • C. 

      Symptoms

    • D. 

      Probable causes

  • 12. 
    The first thing you should do when troubleshooting a motor is a
    • A. 

      Voltage check

    • B. 

      Continuity test

    • C. 

      Visual inspection

    • D. 

      Current measurement

  • 13. 
    The component most likely to be damaged by cleaning solvent is the 
    • A. 

      Brushes

    • B. 

      Bearings

    • C. 

      Slip rings

    • D. 

      Commutator

  • 14. 
    The type of injector that is operated by a rocker arm is the 
    • A. 

      Spray

    • B. 

      Pintle

    • C. 

      Pressure

    • D. 

      Mechanical

  • 15. 
    When lubricant reduces friction, it also reduces
    • A. 

      Heat

    • B. 

      Wear

    • C. 

      Resistance

    • D. 

      All of the above

  • 16. 
    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

  • 17. 
    What component holds a large amount of coolant in close contact with a large volume of air?
    • A. 

      Radiator cap

    • B. 

      Thermostat

    • C. 

      Water pump

    • D. 

      Radiator

  • 18. 
    The purpose of the cooling system thermostat is to maintain correct engine
    • A. 

      Operating temperature

    • B. 

      Coolant temperature

    • C. 

      System pressure

    • D. 

      Coolant flow

  • 19. 
    What is installed on a two-stroke diesel engine to ensure displacement of all exhaust gases?
    • A. 

      Blower

    • B. 

      Intake valve

    • C. 

      Exhaust valve

    • D. 

      Turbulence chamber

  • 20. 
    The maintenance procedure that is considered to be the cheapest and most effective means of reducing injection equipment problems and maintenance costs is
    • A. 

      Correct defective components only

    • B. 

      Rigid maintenance schedules

    • C. 

      Periodic overhaul schedule

    • D. 

      Preventive maintenance

  • 21. 
    The filtration step protects the diesel engine fuel system from
    • A. 

      Blockage of airflow

    • B. 

      Lube system malfunctions

    • C. 

      Slipping belts on the blower

    • D. 

      Abrasion by foreign particles

  • 22. 
    The best step in preventing abnormal amounts of carbon, moisture, and sludge build-up in a diesel engine, is to
    • A. 

      Avoid operating the engine for extended periods at no-load

    • B. 

      Operate the unit at idle speed for long periods of time

    • C. 

      Drain moisture from fuel system periodically

    • D. 

      Perform a preoperational check

  • 23. 
    When performing a compression test the allowable deviation between cylinders is
    • A. 

      25 psi

    • B. 

      50 psi

    • C. 

      75 psi

    • D. 

      100 psi

  • 24. 
    During starting, the turbine engine is rotated up to 20 percent by the 
    • A. 

      AC generator

    • B. 

      Starter motor

    • C. 

      Tachometer generator

    • D. 

      Fuel pump and control unit

  • 25. 
    In the gas turbine engine, cooling air for the transformer rectifier is provided by the 
    • A. 

      Starter motor

    • B. 

      Cooling fan

    • C. 

      Fuel pump and control unit

    • D. 

      Multiple centrifugal switch assembly