Switchgear protections

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

zero
infinity
unity
none of the above

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132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube
SolutionThe reflection co-efficient at the open circuited end of a transmission line.

92. 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

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

Generators
Motors
Transmission line
Transformers

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button" 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 ?

94. 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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