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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016)
If 3000 kW power is to be transmitted over a distance of 30 km, the desirable transmission voltage will be

11 kV
33 kV
132 kV
66 kV

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DGVCL Exam Paper (12-06-2016)
The following is/are the characteristics of SF₆ circuit breakers:

None of these
It does not need an auxiliary breaking chamber
All of these
Short break time of 2 to 2.5 cycles

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DGVCL Exam Paper (12-06-2016)
The core construction is like spokes of a wheel in following transformer:

Shell Type Transformer
None of these
Berry Type Transformer
Core Type Transformer

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DGVCL Exam Paper (12-06-2016)
The main disadvantages of having poor power factors are:

High cost of station and distribution equipment
High energy loss in conductor
All of these
Poor voltage regulation

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DGVCL Exam Paper (12-06-2016)
_____ are used where it is necessary to control a circuit by a low power signal.

Electric Motor
None of these
Relays
Transformer

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DGVCL Exam Paper (12-06-2016)
A circuit breaker is designed to protect an electrical circuit from damage caused by :

Over load
Over current
All of these
Short circuit

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