Hysteresis in an instrument means

DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

The reliability of the instrument

The inaccuracy due to change in temperature

The change in the same reading when the input is first increased and then decreased

The repeatability of the instrument

The reliability of the instrument

The inaccuracy due to change in temperature

The change in the same reading when the input is first increased and then decreased

The repeatability of the instrument

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DGVCL Exam Paper (11-12-2011)
Reactance relay is used to protect against

Phase faults only

Earth faults only

Over voltage faults

Both phase and earth faults

Phase faults only

Earth faults only

Over voltage faults

Both phase and earth faults

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DGVCL Exam Paper (11-12-2011)
If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

Decrease in size

Restrike

Extinguish

Increase in size

Decrease in size

Restrike

Extinguish

Increase in size

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DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto

Its full length

80 % of its full length

25 % of its full length

50 % of its full length

Its full length

80 % of its full length

25 % of its full length

50 % of its full length

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DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

Reduce bearing friction

Eliminate losses on account of fair friction

Reduce winding losses

Eliminate hunting and provide adequate starting torque

Reduce bearing friction

Eliminate losses on account of fair friction

Reduce winding losses

Eliminate hunting and provide adequate starting torque

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DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

15

10

50

25

15

10

50

25

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) Hysteresis in an instrument means

DGVCL Exam Paper (11-12-2011) Reactance relay is used to protect against

DGVCL Exam Paper (11-12-2011) If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

DGVCL Exam Paper (11-12-2011) First zone distance relay protects the transmission line section upto

DGVCL Exam Paper (11-12-2011) The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011) If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be

DGVCL Exam Paper (11-12-2011)
Hysteresis in an instrument means

DGVCL Exam Paper (11-12-2011)
Reactance relay is used to protect against

DGVCL Exam Paper (11-12-2011)
If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

DGVCL Exam Paper (11-12-2011)
First zone distance relay protects the transmission line section upto

DGVCL Exam Paper (11-12-2011)
The purpose of embedding the damper winding in the pole face of a synchronous motor is to

DGVCL Exam Paper (11-12-2011)
If the fault current is 2000 A, the relay plug setting is 50% and the CT ratio is 400/5, the plug setting multiple will be