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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016)
The permissible voltage variation in transmission and distribution system is:

±10%
± 25%
± 1%
± 0.1%

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This answer is as per official key of respective exam.

DGVCL Exam Paper (12-06-2016)
Admittance relay is _____ relay.

Directional
Non-directional
Impedance
None of these

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DGVCL Exam Paper (12-06-2016)
The overall efficiency of Thermal Power Plant is equal to _____

Renkine Cycle Efficiency
None of these
Regenerative Cycle Efficiency
Carnot cycle efficiency

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Product of boiler efficiency, turbine efficiency and generator efficiency.

DGVCL Exam Paper (12-06-2016)
The following is correct :

P = I²xR
P = VxI
All of these
P = V²/R

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True for DC Circuits.

For single pahse ac P = V I CosØ

DGVCL Exam Paper (12-06-2016)
Wave trap is used to trap waves of:

Power frequencies
Higher frequencies entering generator or transformer units
None of these
All of these

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DGVCL Exam Paper (12-06-2016)
The acting contacts for a circuit breakers are made of :

Hard-pressed carbon
Stainless Steel
Copper Tungsten alloy
Porcelain

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