testing-and-maintenance-mcqs - Set (3)

Correct Answer: Orange && Worng Answer: Red

1. Which type of fire extinguisher is used for electrical fire :

  • (A). Water
  • (B). Foam
  • (C). CO2 & dry powder
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    2. Maintenance consist of the following action(s)

  • (A). Replacement of component
  • (B). Repair of component
  • (C). Service of component
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    3. Scheduled maintenance is ______ between breakdown maintenance and the preventive maintenance.

  • (A). Joint
  • (B). Compromise
  • (C). Bridge
  • (D). In
    • View Answer

    Explanation: Not Avilable

    4. Changes are made to the system to reduce the future system failure chances is called :

  • (A). Preventive maintenance
  • (B). Corrective maintenance
  • (C). Adaptive maintenance
  • (D). Perfective maintenance
    • View Answer

    Explanation: Not Avilable

    5. Corrective maintenance is needed when :

  • (A). Equipment fails
  • (B). Equipment produces noise
  • (C). Equipment is available on minimum cost
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    6. In an induction motor, the short circuit test is performed by

  • (A). Full load
  • (B). No load
  • (C). Block rotor
  • (D). Open rotor
    • View Answer

    Explanation: Not Avilable

    7. Watt meter reading in no-load test of induction motor gives :

  • (A). Copper losses in the stator
  • (B). Friction and winding losses
  • (C). Sum of (a) and (b)
  • (D). Total losses in the rotor on no load
    • View Answer

    Explanation: Not Avilable

    8. Noise level test in a transfer is a :

  • (A). Special test
  • (B). Routine test
  • (C). Type test
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    9. While conducting short-circuit test on a transformer the following side is short circuited

  • (A). High voltage side
  • (B). Low voltage side
  • (C). Primary side
  • (D). Secondary side
    • View Answer

    Explanation: Not Avilable

    10. A transformer oil must be free from :

  • (A). Sludge
  • (B). Odour
  • (C). Gases
  • (D). Moisture
    • View Answer

    Explanation: Not Avilable

    11. The transformer oil should have ______ volatility and ______ viscosity.

  • (A). Low, low
  • (B). High, high
  • (C). Low, high
  • (D). High, low
    • View Answer

    Explanation: Not Avilable

    12. Sumpner’s test is conducted on transformers to determine

  • (A). All-day efficiency
  • (B). Temperature
  • (C). Stray losses
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    13. The dielectric strength of transformer oil is expected to be :

  • (A). 11 KV
  • (B). 33 KV
  • (C). 110 KV
  • (D). 400 KV
    • View Answer

    Explanation: Not Avilable

    14. To run two alternators in parallel, the dark lamp method test is performed to ensure proper :

  • (A). Voltage matching
  • (B). Phase difference matching
  • (C). Phase sequence matching
  • (D). Frequency matching
    • View Answer

    Explanation: Not Avilable

    15. Swinburne’s test can be performed at :

  • (A). Any load
  • (B). Only no load
  • (C). Only full load
  • (D). Only half load
    • View Answer

    Explanation: Not Avilable

    16. Size of foundation for electrical machine depends upon :

  • (A). Types of foundation
  • (B). Size of machine
  • (C). Condition of soil
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    17. Vibration in electrical machine can be prevented :

  • (A). By making proper ahgnment
  • (B). By making proper designed foundation
  • (C). Both (a) and (b)
  • (D). None of these
    • View Answer

    Explanation: Not Avilable

    18. A universal coupling is used to connect two shafts

  • (A). Which are not in exact alignment
  • (B). Which are perfectly aligned
  • (C). Whose axes intersect at a small angle
  • (D). Have lateral misalignment
    • View Answer

    Explanation: Not Avilable

    19. Effect of moisture on the insulating materials is to

  • (A). Decrease dielectric constant
  • (B). Decrease dielectric strength
  • (C). Decrease insulation resistance
  • (D). All of the above
    • View Answer

    Explanation: Not Avilable

    20. The complete circuit diagram of a 3-phase induction motor can be drawn with the help of

  • (A). Block rotor test alone
  • (B). Running light and blocked rotor and stator resistance tests
  • (C). Both Blocked rotor and Running light test
  • (D). Running light test alone
    • View Answer

    Explanation: Not Avilable

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