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

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

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of the following statement is TRUE?

The current carrying capacity of cables in DC is less than that in AC.
Underground cables are laid at sufficient depth to avoid being unearthed easily due to removal of soil.
In the cables, sheaths are used to provide enough strength.
In the cables, the location of fault is usually found out by comparing the capacitances of insulated conductors.

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MGVCL Exam Paper (30-07-2021 Shift 2)
According to Global Wind Energy Council in 2016, India ranked____ in the Global Wind Power Installed Capacity Index with cumulative installed wind power generation.

Third
Second
First
Fourth

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MGVCL Exam Paper (30-07-2021 Shift 2)
A three-phase 400 V, 6-pole, 50 Hz squirrel-cage induction motor is running at a slip of 5%. The speed of rotor with respect to stator magnetic field and speed of the stator magnetic field with respect to rotor magnetic field are

950 rpm, zero
-50 rpm, zero
950 rpm, 1000 rpm
-50 rpm, 1000 rpm

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