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When transmission line is energized, the wave that propagates on it is
current wave only
power factor wave only
voltage wave only
both current wave and voltage wave
current wave only
power factor wave only
voltage wave only
both current wave and voltage wave
Answer
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The power loss is an important factor for the design of
feeder
motor
transmission line
generator
feeder
motor
transmission line
generator
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The rated secondary current of current transformer for relays is generally
10 A
5 A
30 A
20 A
10 A
5 A
30 A
20 A
Answer
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A fuse should have
high conductivity
low cost
All of these
low melting point
high conductivity
low cost
All of these
low melting point
Answer
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Which of the following is the least expensive protection for over current is low voltage system ?
oil circuit breaker
rewireable fuse
air break circuit breaker
isolator
oil circuit breaker
rewireable fuse
air break circuit breaker
isolator
Answer
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In a single bus-bar system there will be complete shut down when
fault occurs on the bus itself
fault occurs on neutral line
fault occurs with respect to earthing
two or more faults occur simultaneously
fault occurs on the bus itself
fault occurs on neutral line
fault occurs with respect to earthing
two or more faults occur simultaneously
Answer
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