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The fault that imposes severest duty on the circuit breaker is
line to line fault
all three lines short-circuited
line to ground fault
two lines to ground fault
line to line fault
all three lines short-circuited
line to ground fault
two lines to ground fault
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Directional relay are based on flow of
All of these
voltage wave
power
current
All of these
voltage wave
power
current
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The reflection co-efficient at the open circuited end of a transmission line
zero
infinity
unity
None of these
zero
infinity
unity
None of these
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Back up protection is generally used for protection against
both open and short-circuit faults
None of these
short-circuit faults only
open-circuit faults only
both open and short-circuit faults
None of these
short-circuit faults only
open-circuit faults only
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Breaking capacity of a circuit breaker is usually expressed in terms of
MVA
volts
Mw
amperes
MVA
volts
Mw
amperes
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The fusing factor is
None of these
always more than 1
always less than 1
always 1
None of these
always more than 1
always less than 1
always 1
Answer
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