The circuit breaker generally used in railway traction is

DGVCL Exam Paper (11-12-2011)
The circuit breaker generally used in railway traction is

Minimum Oil CB

Vacuum CB

Bulk Oil CB

Air break CB

Minimum Oil CB

Vacuum CB

Bulk Oil CB

Air break CB

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

The repeatability of the instrument

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

The reliability of the instrument

The inaccuracy due to change in temperature

The repeatability of the instrument

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

The reliability of the instrument

The inaccuracy due to change in temperature

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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

50

25

10

15

50

25

10

15

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

Low copper loss

Low voltage

Low iron loss

Low copper as well as iron loss

Low copper loss

Low voltage

Low iron loss

Low copper as well as iron loss

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DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

Torque and speed are proportional to the square of the armature current

Its torque is proportional to the square of the armature current and speed is directional proporational to torque

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque

Torque and speed are inversely proportional to the square of the armature current

Torque and speed are proportional to the square of the armature current

Its torque is proportional to the square of the armature current and speed is directional proporational to torque

Its torque is proportional to the square of the armature current and speed is inversely proportional to torque

Torque and speed are inversely proportional to the square of the armature current

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DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

More than 90%

80 %

Less than 90%

90 %

More than 90%

80 %

Less than 90%

90 %

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) The circuit breaker generally used in railway traction is

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

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) Distribution transformers have good all day efficiency due to

DGVCL Exam Paper (11-12-2011) DC series motors are best suited for traction work because

DGVCL Exam Paper (11-12-2011) The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

DGVCL Exam Paper (11-12-2011)
The circuit breaker generally used in railway traction is

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

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)
Distribution transformers have good all day efficiency due to

DGVCL Exam Paper (11-12-2011)
DC series motors are best suited for traction work because

DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be