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Switchgear & Protection MCQ Test

  1. A transmission line is protected by....
  2. What is the arc voltage in a circuit breaker?
  3. On which of the following effects of electric current a fuse operates?
  4. SF6 is which type of gas?
  5. The arcing contacts in a circuit breaker are made
  6. Outdoor switchgear is generally used for voltage
  7. Arcing voltage will be the least in case of
  8. Which material is used for bus bars?
  9. Which part of the circuit breaker is helpful in breaking the current?
  10. The thermal circuit breaker has...........
  11. A thermal protection switch can protect against ____.
  12. Which of the following medium is employed for the extinction of arc in air circuit breaker?
  13. The arcing contacts in a circuit breaker are made of Copper tungsten alloy.
  14. On which of the following routine tests are conducted?
Last Updated: Feb 21, 2023,
Posted in Interview Questions,
20 Questions
Switchgear & Protection MCQ

Take Switchgear & Protection MCQ Test & Online Quiz to test your Knowledge

Below is the Switchgear & Protection MCQ test that checks your basic knowledge of Switchgear & Protection. This Switchgear & Protection MCQ Test contains 20 Multiple Choice Questions. You have to select the right answer to the question. Finally, you can also take the Online Quiz from the Take Switchgear & Protection Quiz Button.

  • Inrush protection
  • Distance protection
  • Time graded and current graded over current protection
  • Both (B) and (C)
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  • Lagging the arc current by 90°
  • Leading the arc current by 90°
  • In phase with the arc current.
  • Lagging the arcing current by 180°
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  • Heating effect
  • Electrostatic effect
  • Photoelectric effect
  • Magnetic effect
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  • Electro negative
  • Electro positive
  • Both (a) & (b)
  • None of these
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  • Copper tungsten alloy
  • Porcelain
  • Electrolytic copper
  • Aluminum alloy
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  • Copper rods.
  • Aluminium rods.
  • Silver rods
  • Any conducting material
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  • Instantaneous trip action
  • Delayed trip action
  • Instantaneous short action
  • Any of the above
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  • Short-circuit
  • Overvoltage
  • Overload
  • Temperature
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  • Oil circuit breakers Air
  • blast circuit breakers
  • Minimum oil circuit breakers
  • All of the above
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  • Protect the line
  • Open the circuit
  • Prevent excessive currents
  • None of the above
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  • Inverse time trip
  • Time-delay trip
  • Shunt trip
  • All of the above
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  • Field emission from the contact surface
  • Thermal emission from the contact surface
  • Thermal ionisation of gas
  • All of above
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  • Inrush protection
  • Distance protection
  • Time graded and current graded over current protection
  • Both (B) and (C)
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  • in phase with the arc current
  • lagging the arc current by 90°
  • leading the arc current by 90°
  • None of the above
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  • Load flow, short-circuit and stability
  • Load flow
  • Load flow and stability
  • Load flow and short-circuit
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