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SSC JE 2017: Switchgear & Protection Rankers Quiz 5
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Question 1
What is the dimension of the copper strips used for the strip earthing?
Question 2
For average values of load current, current chopping occurs more frequently in:
Question 3
What is the factor of safety used for current ratings in a power installation?
Question 4
As per recommendation of ISI, the maximum number of points of lights, fans and socket outlets that can be connected in one sun-circuit is
Question 5
A circuit breaker is rated as 1500 A, 1000 MVA, 33 kV, 3-second, 3-phase oil circuit breaker. The rated normal current is
Question 6
Two fuse wires of the same material have fusing currents of 10A and 5A. The 10A fuse will have
Question 7
In a short-circuit test on a circuit breaker, the following readings were obtained on single frequency transient:
Time to reach the peak re-striking voltage =50
Peak re-striking voltage = 100 kV
The average RRRV is-
Time to reach the peak re-striking voltage =50
Peak re-striking voltage = 100 kV
The average RRRV is-
Question 8
For very long high voltage transmission lines, the system of overcurrent protection used is
Question 9
In the power system, the resonance rarely occurs at the supply frequency because
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Jun 24ESE & GATE EE