2A672 Edit Code 6 40-85

48 Questions | Total Attempts: 292

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2A672 Quizzes & Trivia

Questions and Answers
  • 1. 
    41.) the portion of the voltage regulator that supplies exciter field voltage is transformer?
    • A. 

      (T1) and rectifier (B3)

    • B. 

      (T3) and rectifier (B2)

    • C. 

      (T2) and rectifier (B1)

    • D. 

      (T1) and rectifier (CR26)

  • 2. 
    Refer to fold out 1. after performing an operational check of the -86d generator set you proceed to shut the unit down. after the generator stops you notice the engine on light continues to glow. what is the probable cause of this trouble?
    • A. 

      S46 open

    • B. 

      S48 open

    • C. 

      S46 closed

    • D. 

      S48 closed

  • 3. 
    Refer to fold out 1. during operation of the -86 you get no responce when you place s13 in the GENERATE position. a check of voltage at j8, terminal N shows 12 volts DC. whats the probable cause of this trouble?
    • A. 

      M4 is open

    • B. 

      S53 is open

    • C. 

      K23 is open

    • D. 

      K16 is open

  • 4. 
    Refer to foldout 1. You are operating an -86 at governed speed but voltage does not build up. What is the probable cause of this trouble?
    • A. 

      S1 is in the automatic position

    • B. 

      R61 is turned fully clockwise

    • C. 

      K16 contacts are closing

    • D. 

      K23 contacts are open

  • 5. 
    During operation of the -86 what position do you place control switch S13 in to move the fuel rack and increase the engine speed to 2000 RPM?
    • A. 

      IDLE

    • B. 

      GENERATE

    • C. 

      BUILD UP VOLTS

    • D. 

      AUTO TEST BANK

  • 6. 
    Refer to foldout 1. During an operational check of the -86 the shut down solenoid energizes immediately after the engine run indicator illuminates. what is a probable cause of this trouble?
    • A. 

      S48 open

    • B. 

      S46 open

    • C. 

      S49 shorted

    • D. 

      S22 stuck open

  • 7. 
    Refer to fold out 1. During operation of the -86 the low coolant light (DS50) illuminates. but the unit does not shut down. What is th probable cause of this trouble?
    • A. 

      A2

    • B. 

      DS50

    • C. 

      S55 is closed

    • D. 

      S48 is closed

  • 8. 
    what component controls the strength of the -86 generator exciter field L2?
    • A. 

      Excitation relay K16

    • B. 

      Time delay relay K14

    • C. 

      Voltage regulator VR1

    • D. 

      Automatic manual switch S1

  • 9. 
    what component on the -86 generator is used to manually increase output voltage?
    • A. 

      Voltage rheostat R61

    • B. 

      Excitation relay K16

    • C. 

      Test bank switch S202

    • D. 

      Auto/manual switch S1

  • 10. 
    50.) refer to foldout 1. where is the best point to check volage to the -86 generator exciter field?
    • A. 

      J8, terminal D-F

    • B. 

      J8, terminal V-X

    • C. 

      VR1, terminal C-R

    • D. 

      Automatic-manual switch S1

  • 11. 
    An -86 is operating and the alternationg current (AC) voltmeter is reading 200 volts AC on all three phases. what do you do?
    • A. 

      Adjust VR1

    • B. 

      Adjust R61

    • C. 

      Adjust VR1 and R61

    • D. 

      Switch S15 to the L-N position

  • 12. 
    Refer to fold out 1. An -86 gernator set is sent to the shop on a Red X for will not apply power to the aircraft. During the operational check you place S5 in the closed position and the contactor light illuminates. When you release the switch, the contacts opens. What is the probable cause of this trouble?
    • A. 

      S2 is open

    • B. 

      R46 is is open

    • C. 

      K2 is closed

    • D. 

      K17 is closed

  • 13. 
    What effect does a defective K4 relay have on the -86 generator output circuit?
    • A. 

      K607 de-energizes and K1 De-energizes

    • B. 

      K607 energizes and K1 de-energizes

    • C. 

      K607 de-energizes and K1 energizes

    • D. 

      No effect

  • 14. 
    While operating an -86 at governed speed you place S13 in the build up position and the undervoltage light comes on. What is the probable cause of this trouble?
    • A. 

      Voltage regulator

    • B. 

      Plug interlock relay

    • C. 

      Memory time delay relay

    • D. 

      Overvoltage/undervoltage relay

  • 15. 
    You are driving on the flight line and you notice an -86 power unit with all the fault lights on. You try to reset S23 but the light stays on. what is the probable cause of this trouble?
    • A. 

      S30 is shorted

    • B. 

      S23 is stuck open

    • C. 

      K17 contacts are closed

    • D. 

      K23 contacts are closed

  • 16. 
    When troubleshooting any electrical system you can locate a starting point by first finding the?
    • A. 

      Common ground bus

    • B. 

      Main circuit breaker

    • C. 

      External power source

    • D. 

      Last know source of power

  • 17. 
    Which step of troubleshooting is considered the most difficult?
    • A. 

      Recognition and verification

    • B. 

      Isolation and elimination

    • C. 

      Repair and check

    • D. 

      Analysis

  • 18. 
    To test the load contactor relay K1, using test probes, in what position must the automatic-manual voltage control switch be placed in?
    • A. 

      Automatic

    • B. 

      Manual

    • C. 

      Test

    • D. 

      Off

  • 19. 
    What component on the B809-A generator set fuel system distributes and delivers an accurate amount of fuel to the engine cylinders?
    • A. 

      Injector pump

    • B. 

      Transfer pump

    • C. 

      Injector nozzle

    • D. 

      Throttle actuator

  • 20. 
    60.) What B809-A generator set speed control system component produces a frequency pulse train for engine speed reference?
    • A. 

      Magnetic Pick up

    • B. 

      Engine speed governor

    • C. 

      Speed trim potentiometer

    • D. 

      Speed control potentiometer

  • 21. 
    What signal powers the regulator card output pulse sent to the exciter field of the B809-A generator?
    • A. 

      28.5 VDC

    • B. 

      110 VDC

    • C. 

      115 VAC

    • D. 

      200 VAC

  • 22. 
    What action occurs when the B809A generator set Alternating current (AC) card senses an AC supply fault? 
    • A. 

      Only generator output stops

    • B. 

      Only the AC contactor opens

    • C. 

      AC supply warning light illuminates

    • D. 

      AC contactor opens and generator output stops

  • 23. 
    What condition is sensed by the direct current (DC) card on the B809-A generator set ?
    • A. 

      Overtemperature

    • B. 

      Under frequency

    • C. 

      Over frequency

    • D. 

      Low fuel

  • 24. 
    Refer to fold out 2. While operating a B809A generator what switch is closed to provide potential to the exciter field?
    • A. 

      S1, master switch

    • B. 

      S5, run/idle toggle switch

    • C. 

      S3 interlock toggle switch

    • D. 

      PB2 output control pushbutton switch

  • 25. 
    Refer to folout 2. During high voltage operation of the B809A generator set , what action occurs to prevent the direct current (DC) from closing?
    • A. 

      High sence relay (HSR) energizes

    • B. 

      Interlock (INT) relay energizes

    • C. 

      INT relay de-energizes

    • D. 

      HSR De-energizes

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