Prime Power Test Technician Level 2 Test 3 Of 3 (Testing Knowledge)

50 Questions | Total Attempts: 698

SettingsSettingsSettings
Please wait...
Technician Quizzes & Trivia

Test Technician Level 2 Test 3. Test consists of 50 Questions. Test has 90 minute time limit. You may use a calculator and look up any formulas not given. Allow yourself at least an hour to complete as you cannot save and resume the test later. Good Luck!


Questions and Answers
  • 1. 
    Which of the following is not a standard voltage used for trip power on a medium voltage breaker?
    • A. 

      48

    • B. 

      120

    • C. 

      60

    • D. 

      240

    • E. 

      None of the above

  • 2. 
    Which of the following is the ANSI device number for a phase sequence or phase balance voltage relay?
    • A. 

      47

    • B. 

      59

    • C. 

      86

    • D. 

      27

    • E. 

      67

  • 3. 
    Measuring the resistivity of earth with a typical ground resistance test set is accomplished by:
    • A. 

      The 2 point method

    • B. 

      The fall of potential method

    • C. 

      The 3 point method

    • D. 

      The use of 4 electrodes

  • 4. 
    Assuming each of the folliwing is the same length, which has the lowest resistance?
    • A. 

      500 MCM copper cable

    • B. 

      350 MCM aluminum cable

    • C. 

      1/4 x 6 aluminum bus

    • D. 

      1/4 x 6 copper bus

    • E. 

      1/2 x 2 copper bus

  • 5. 
    Metal enclosed medium voltage interrupter switches should be
    • A. 

      Stored energy operated

    • B. 

      Motor operated

    • C. 

      Closing coil operated

    • D. 

      Non load-break

    • E. 

      Hook stick operated

  • 6. 
    Protection against extremely high fault current is typically achieved by use of
    • A. 

      An instantaneous overcurrent relay

    • B. 

      Phase balance relaying

    • C. 

      Arrestors

    • D. 

      Current limiting fuses

    • E. 

      Equipment maximum voltage ratings

  • 7. 
    Switchgear interiors are compartmentalized for the purpose of
    • A. 

      Worker safety

    • B. 

      Dust and dirt control

    • C. 

      Moisture control

    • D. 

      Fault damage control

    • E. 

      All of the above

  • 8. 
    Directional relays are typically used
    • A. 

      On radial feeders

    • B. 

      To prevent the motoring of a generator

    • C. 

      To protect buses

    • D. 

      On double ended substations with closed bus ties

    • E. 

      B and C

  • 9. 
    A 3 phase transformer has a name plate voltage rating  of 13200-480Y/277. The actual incoming voltage is 13,750V. A secondary voltage of 500v is desired. Which of the follwing taps available on the no-load tap changer should be used to obtain the closest possible voltage to the desired voltage.
    • A. 

      13,200

    • B. 

      13,860

    • C. 

      13,530

    • D. 

      12,870

    • E. 

      12,540

  • 10. 
    Which one of the follwing is damaging to many insulating materials used in high voltage rotating machines?
    • A. 

      Hysteresis

    • B. 

      Saturation

    • C. 

      Corona

    • D. 

      Eddy currents

    • E. 

      None of the above

  • 11. 
    Which device may continue to be a source of harmful electrical energy after all switches and circuit breakers have been opened for a significant time?
    • A. 

      Transformer

    • B. 

      Capacitor

    • C. 

      Resistor

    • D. 

      Generator

    • E. 

      Surge arrestor

  • 12. 
    When measuring the ground resistance of an industrial grounding network, the ground resistance would normally be expected to be no greater than:
    • A. 

      .01 ohms

    • B. 

      .5 ohms

    • C. 

      5 ohms

    • D. 

      10 ohms

    • E. 

      25 ohms

  • 13. 
    A watt-hour meter has a watt-hour constant of 1.2, it is used with 1200/5 ratio current transformers and 14,400/120 potential transfromers. What is the primary watt-hour constant Kh?
    • A. 

      720

    • B. 

      2.4

    • C. 

      1.2

    • D. 

      34,560

    • E. 

      Nobody knows!

  • 14. 
    NETA acceptance testing specifications require that analog field instruments be tested for accuracy:
    • A. 

      Every month

    • B. 

      Every 3 months

    • C. 

      Every 6 months

    • D. 

      Every 12 months

    • E. 

      Every 24 months

  • 15. 
    The most important reason secondary circuits of current transformers should never be left open is:
    • A. 

      Fuse could blow

    • B. 

      Ammeter may not work

    • C. 

      Voltmeter could be affected

    • D. 

      Dangerous voltages could be produced

    • E. 

      None of the above

  • 16. 
    Polarization index is defined as the ratio of the measured insulation resistance at what 2 specific times?
    • A. 

      10 mins to 1 min

    • B. 

      60 secs to 30 secs

    • C. 

      10 mins to 5 mins

    • D. 

      5 mins to 1 min

  • 17. 
    Which of the following will have the greatest effect on an  insulation resistance reading?
    • A. 

      The size of the device being tested

    • B. 

      The temperature of the device being tested

    • C. 

      The ambient temperature

    • D. 

      The relative humidity

  • 18. 
    A synchronous motor used without load in an electric system serves to:
    • A. 

      Balance the high voltage drop

    • B. 

      Improve the power factor of the system

    • C. 

      Provide inductive reactive power

    • D. 

      Regulate the voltage for variable speed machines

  • 19. 
    A delta connected 3 phase 3 wire system with balanced phase currents of 542 amps has a line currents of approximately:
    • A. 

      313 amps

    • B. 

      767 amps

    • C. 

      939 amps

    • D. 

      542 amps

    • E. 

      271 amps

  • 20. 
    Capacitors are used in AC circuits to:
    • A. 

      provide power factor correction

    • B. 

      Decrease system kVA demand

    • C. 

      Provide more efficient utilization of feeders

    • D. 

      All of the above

  • 21. 
    What is normally considered the maximum acceptable power factor for new insulating oil?
    • A. 

      .05 %

    • B. 

      .5 %

    • C. 

      1.0%

    • D. 

      1.5%

  • 22. 
    What is the ANSI device number is for an under voltage relay?
    • A. 

      47

    • B. 

      59

    • C. 

      86

    • D. 

      87

    • E. 

      27

  • 23. 
    In ccordance with NETA standards, what is the correct acceptance test voltage for 5kV rated EPR 133% cable?
    • A. 

      65kV

    • B. 

      45kV

    • C. 

      55kV

    • D. 

      25kV

    • E. 

      15kV

  • 24. 
    If a watt-hour meter has a disk constant of 3.6 and is used with 600:5 ampere current transformers and 20:1 potential transformers, the primary Kh is?
    • A. 

      133.3 whr per revolution

    • B. 

      8640 whr per revolution

    • C. 

      1728 whr per revolution

    • D. 

      43200 whr per revolution

  • 25. 
    Interfacial tension
    • A. 

      Is measured to detect metals in oil

    • B. 

      Is measured in MgKOH/gm

    • C. 

      Is measured in dynes/cm

    • D. 

      Determines the resistivity of oil

    • E. 

      Principally detects impurities in the oil

Back to Top Back to top