Switchgear protections

41. The reflection co-efficient at the open circuited end of a transmission line.

zero
infinity
unity
none of the above

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href="https://exam.pscnotes.com/mcq/the-reflection-co-efficient-at-the-open-circuited-end-of-a-transmission-line/#more-43596">Detailed SolutionThe reflection co-efficient at the open circuited end of a transmission line.

42. To limit short-circuit current in a power system are used

earth wires
isolators
H.R. fuses
reactors

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button" href="https://exam.pscnotes.com/mcq/to-limit-short-circuit-current-in-a-power-system-are-used/#more-43549">Detailed SolutionTo limit short-circuit current in a power system are used

43. For which of the following protection from negative sequence currents is provided ?

Generators
Motors
Transmission line
Transformers

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href="https://exam.pscnotes.com/mcq/for-which-of-the-following-protection-from-negative-sequence-currents-is-provided/#more-43020">Detailed SolutionFor which of the following protection from negative sequence currents is provided ?

44. In Railway applications ______ circuit breaker is used.

SFe
bulk oil
minimum oil
air break

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href="https://exam.pscnotes.com/mcq/in-railway-applications-______-circuit-breaker-is-used/#more-42915">Detailed SolutionIn Railway applications ______ circuit breaker is used.

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