MGVCL Exam Paper (30-07-2021 Shift 3)
In transformer testing, Sweep Frequency Response Analysis (SFRA) testing is a tool to help locate ____

All of these
Short circuits
Winding damage
Core movement

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MGVCL Exam Paper (30-07-2021 Shift 3)
Match the following shown in table

A = (iii), B = (i), C = (ii)
A = (ii), B = (i), C = (iii)
A = (ii), B = (iii), C = (i)
A = (iii), B = (ii), C = (i)

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MGVCL Exam Paper (30-07-2021 Shift 3)
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, what will be the voltage across a 150 W lamp (L₂)?

160 V
120 v
180 V
240 V

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MGVCL Exam Paper (30-07-2021 Shift 3)
In a series RLC circuit, the supply voltage is 230 V at 50 Hz. The resonant current is 2 A at the resonant frequency of 50 Hz. Under the resonant condition, the voltage across the capacitor is measured to be equal to 460 V. What are the values of L and C?

0.73 mH and 13.85 pF
0.53 H and 15.83 pF
0.73 H and 13.85 pF
0.53 mH and 15.83 pF

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MGVCL Exam Paper (30-07-2021 Shift 3)
In transformers,
Statement 1: Deterioration of oil may occur due to the result of prolonged overloading of the transformer.
Statement 2: Dielectric faults occur in the winding due to turn-to-turn insulation breakdown.

Both Statement 1 and Statement 2 are TRUE
Statement 1 is TRUE and Statement 2 is FALSE
Both Statement 1 and Statement 2 are FALSE
Statement 1 is FALSE and Statement 2 is TRUE

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