Testing and Commissioning of Electrical Equipments (2180901) MCQs
MCQs of Switch gear and Protective devices
| 51. |
What is maximum and minimum control voltage for closing and opening operation of Solenoid in the circuit breaker?
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Answer:
Option (a) |
| 52. |
DC resistance measurement test of CB is carried out with the help of ___________ and it is the _________ test for CB.
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Answer:
Option (b) |
| 53. |
Which of the following quantity is worked out by performing Millivolt-Drop test in CB?
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Answer:
Option (c) |
| 54. |
Which of the following test is carried out to find make and break the operation of CB?
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Answer:
Option (b) |
| 55. |
Which of the following test is carried out to prove the adequacy of design and manufacture of CB?
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Answer:
Option (b) |
| 56. |
In mechanical endurance test, CB is opened and closed up to ________ times
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Answer:
Option (b) |
| 57. |
In mechanical endurance test of CB, around __________ operations are conducted by energizing the relays and remaining are by closing the trip circuit by other means.
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Answer:
Option (b) |
| 58. |
Mechanical Endurance tests on __________ AC circuit breakers are conducted without current and voltage in the main circuit.
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Answer:
Option (a) |
| 59. |
The mechanical endurance test is conducted successfully if the contacts, linkages and all the other parts should be
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Answer:
Option (d) |
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