Daddys Quiz Part 1

50 Questions | Total Attempts: 121

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Daddys Quiz Part 1

THis quiz is for my father and his work with the linesmen company so he can practice his work and quiz himself.


Questions and Answers
  • 1. 
    The clearance between conductor line on an overhead line is determined by the :
    • A. 

      Conductor Line

    • B. 

      Voltage in the Line

    • C. 

      Current in the Line

    • D. 

      Power factor of the load

  • 2. 
    Where the mid point of one phase of a 3 phase 4 wire 240 delta connected secondary is grounded to supply lightning and similar loads the high leg voltage will measure :
    • A. 

      120

    • B. 

      240

    • C. 

      180

    • D. 

      208

  • 3. 
    In order to obtain the maximum secondary voltage from the transformer, the action to be taken to set the tap changer at
    • A. 

      100%

    • B. 

      104.5%

    • C. 

      95.9%

    • D. 

      95.5%

  • 4. 
    Two energized three phase liners are being phase test with a volt meter. When non corresponding phases are connected through the meter, the reading should be
    • A. 

      Phase to ground voltage

    • B. 

      Zero

    • C. 

      Phase to neutral voltage

    • D. 

      Phase to phase voltage

  • 5. 
    If loaf break equipment is not available on a 150 kva transformer bank the first action to take if it becomes necessary to open the bank is to
    • A. 

      Open the primary disconnects

    • B. 

      Ground the secondaries

    • C. 

      Use the consumer service equipment to remove the load

    • D. 

      Set the tap changer to 100%

  • 6. 
    One disadvantage of a 3 phase transformer compared to three single phase transformers is :
    • A. 

      They cannot be operated on a reduced load emergency

    • B. 

      Higher initial cost

    • C. 

      They require more busbar structure and switch gear

    • D. 

      They have a slightly lower operating efficiency

  • 7. 
    You wish to determine the peak load on a transformer secondary  what instrument is required?
    • A. 

      Recording meter

    • B. 

      Maxl meter

    • C. 

      Phase meter

    • D. 

      Clip on ammeter

  • 8. 
    The potential at the star point on a underground three phase star connected transformer bank with two primary transformer fuses blown would be :
    • A. 

      50%

    • B. 

      75%

    • C. 

      0%

    • D. 

      100%

  • 9. 
    What is the first step taken when paraleling two single phase transformers
    • A. 

      Read name plate of both transformers

    • B. 

      Ascertain if primary phase is the same

    • C. 

      Open fuse on second transformer and jumper secondaries

    • D. 

      Jumper top secondary wire and read voltage between bottom secondaries

  • 10. 
    Which of the following is the acceptable method of preventing backfeed from a transformer
    • A. 

      Short out primary bushing

    • B. 

      Disconnect secondary risers

    • C. 

      Tell costumer not to use any electrical equipment

    • D. 

      Open the case ground

  • 11. 
    The main purpose of a stress relief cone on a 15 kv cable is to
    • A. 

      Eliminate electrical stress at the cable termination

    • B. 

      Prevent cable slipping through the throat clips

    • C. 

      Eliminate mechanical stress on the cable

    • D. 

      Prevent moistiure from entering the cable

  • 12. 
    The normal percentage change between taps on a distrubution transformer is
    • A. 

      9.5%

    • B. 

      4.5%

    • C. 

      13.5%

    • D. 

      2.5%

  • 13. 
    The primary neutral of a WYE delta bank is grounded, what could be the results
    • A. 

      A fault on one transformer will cause the bank to automically become open WYE opens delta and possibly overload remaining two transformers.

    • B. 

      The bank voltage will fluctuate wildly

    • C. 

      Unbalanced neutral loading will cause the system fluctuatuion and possibly overload the remaining two transformers.

    • D. 

      The bank will work normally.

  • 14. 
    Small cracks in the insulators may
    • A. 

      Increase line resistance to ground

    • B. 

      Cause arc over

    • C. 

      Increase line voltage to ground

    • D. 

      Be detected with the aid of a test lamp

  • 15. 
    A function of a lightning arrestor when serving a power system is to
    • A. 

      Open the circuit when lightning strikes to the line

    • B. 

      Act as open circuit during normal conditions

    • C. 

      Limit the current to the ground during the fault

    • D. 

      Reliever abnormal low voltage of the line

  • 16. 
    After lockout a circuit recloser is
    • A. 

      Should be purged

    • B. 

      Heeds to be reset manually

    • C. 

      Will close automatically

    • D. 

      Needs to have the recloser coil replaced

  • 17. 
    A simple device for limiting fault current is :
    • A. 

      Current limiting fuse

    • B. 

      Reactor

    • C. 

      OCR

    • D. 

      All of the above

  • 18. 
    A voltage regulator will when additional load is connected to the feeder
    • A. 

      Increase the generator output

    • B. 

      Boost the line voltage

    • C. 

      Control the amount of load

    • D. 

      Buck the line voltage

  • 19. 
    The percent impedance voltage figure shown on a transformer name plate is taken into consideration when
    • A. 

      Connecting low power factor load to the transformer

    • B. 

      Taking a single phase load off a three phase line

    • C. 

      Two or more secondary distrubution lines are to be tapped off a wye connected primary

    • D. 

      Connecting transformers in parallel

  • 20. 
    If an ammeter utilizing a current transformer is to be removed while the circuit is energized, the precaution which must be taken is,
    • A. 

      Short circuit the secondary of the transformer before removing the ammeter

    • B. 

      Connect the secondary of the transformer to the system ground

    • C. 

      Short the secondary of the transformer after removing ammeter

    • D. 

      De energize the circuit

  • 21. 
    When removing a voltmeter from a potential transformer the transformer terminals must never be
    • A. 

      Placed in paralell with the line

    • B. 

      Open circuited

    • C. 

      Short circuited

    • D. 

      Connected in series with the line

  • 22. 
    The best rope for use where die electric strength is required is
    • A. 

      Polypropylene

    • B. 

      Nylon

    • C. 

      Manila

    • D. 

      Dacron

  • 23. 
    The correct method of installing u bolt clamps on a wire rope is
    • A. 

      Straggered one on live end, one on dead end

    • B. 

      U bolts on dead end of rope

    • C. 

      U bolts on live end of rope

    • D. 

      None of the above

  • 24. 
    The first indication of overloading a hook is
    • A. 

      Peeling paint

    • B. 

      A worn spot

    • C. 

      Straightening

    • D. 

      None of the above

  • 25. 
    The primary function of a phase rotation meter indicator is to check
    • A. 

      Sequence

    • B. 

      Voltage

    • C. 

      Resistance

    • D. 

      Current

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