MGVCL Exam Paper (30-07-2021 Shift 2)
In a 3-phase, 4-wire, 400/230 V system, a lamp (L1) of 100 W is connected to one phase and neutral and a lamp (L2) of 150 W is connected to the second pahse and neutral. If the neutral wire is disconnected accidently, then

100 W lamp (L1) becomes dim and 150 W lamp (L2) becomes brighter
both 100 W lamp (L1) and 150 W lamp (L2) becomes dim
100 W lamp (L1) becomes brighter and 150 W lamp (L2) becomes dim
both 100 W lamp (L1) and 150 W lamp (L2) becomes brighter

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MGVCL Exam Paper (30-07-2021 Shift 2)
In a power network, 400 kV is recorded at a 415 kV bus. A 50 MVAR, 415 kV shunt reactor is connected to the bus. What is the reactive power absorbed by the shunt reactor?

66.45 MVAR
76.45 MVAR
46.45 MVAR
56.45 MVAR

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MGVCL Exam Paper (30-07-2021 Shift 2)
In circuit breaker, the term MCCB stands for

moulded case circuit breaker
miniature compact circuit breaker
modern closed circuit breaker
miniature case circuit breaker

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MGVCL Exam Paper (30-07-2021 Shift 2)
Interposing current-transformer (CT) is used in differential protection of a transformer to

minimize the effect of saturation of the main CTs
increase the sensitivity of the relay
limit the main CT secondary current
match the standard ratio of CTs used on both sides of the transformer winding

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