DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
Which motor is used to start heavy loads?

Differentially compounded motor

Shunt motor

Cumulatively compounded motor

Series motor

Differentially compounded motor

Shunt motor

Cumulatively compounded motor

Series motor

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DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

Points

Icons

Spots

Pixels

Points

Icons

Spots

Pixels

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DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

Current is minimum and power factor is 0.5

Current is maximum and power factor is 0.5

Current is minimum and power factor is unity

Current is maximum and power factor is unity

Current is minimum and power factor is 0.5

Current is maximum and power factor is 0.5

Current is minimum and power factor is unity

Current is maximum and power factor is unity

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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low iron loss

Low copper loss

Low voltage

Low copper as well as iron loss

Low iron loss

Low copper loss

Low voltage

Low copper as well as iron loss

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DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

Lightning

Magnetizing inrush current

Unbalanced protection

Switching over voltages

Lightning

Magnetizing inrush current

Unbalanced protection

Switching over voltages

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DGVCL Exam Paper (11-12-2011)
If the voltage at the two ends of a line are 132 kV, and its reactance is 40 Ω, the stability limit of the line is

251.5 MW

435.6 MW

217.8 MW

500 MW

251.5 MW

435.6 MW

217.8 MW

500 MW

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