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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016)
Isolator in substation is open under _____ condition.

Full load
None of these
Short circuit
No load

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Isolators do not have capacity to make or breake circuit when current flowing in circuit

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

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

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DGVCL Exam Paper (12-06-2016)
Induction cup relay is operated due to changes in :

All of these
Current
Voltage
Impedance

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DGVCL Exam Paper (12-06-2016)
The SI unit of energy is :

Joule
Newton
Coulomb
Henry

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

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

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DGVCL Exam Paper (12-06-2016)
In case the height of transmission tower is increased, which of the following parameter is likely to change?

Capacitance
None of these
Resistance
Inductance

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