MGVCL Exam Paper (30-07-2021 Shift 2)
The voltage applied to a transformer primary is increased keeping V/f constant. With this, the core loss ____ and the magnetizing current (Im) ____

decreases, increases
remains constant, decreases
increases, remains constant
increases, increases

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of these is not a monitoring and diagnostic test for transformer oil?

Dissolved Gas Analysis
Volatility Level Analysis
Furanic Compound Analysis
Dissolved Metals Analysis

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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?

56.45 MVAR
46.45 MVAR
76.45 MVAR
66.45 MVAR

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MGVCL Exam Paper (30-07-2021 Shift 2)
In transformer, a Sweep Frequency Response Analysis (SFRA) test will help detect ____

Age of the insulation
Aging by-products
Movement / damage to internal components
Moisture in the windings

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MGVCL Exam Paper (30-07-2021 Shift 2)
The miniature circuit breaker (MCB) with Class D trip characteristics trips instantaneously when the current flowing through it reaches ____ the rated current.

between 2 to 3 times
between 3 to 5 times
between 5 to 10 times
between 10 to 20 times

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