A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

DGVCL Exam Paper (11-12-2011)
A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

0.4 %

6 %

5 %

4 %

0.4 %

6 %

5 %

4 %

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

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

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

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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

10

15

50

25

10

15

50

25

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DGVCL Exam Paper (11-12-2011)
Due to skin effect

Current flows through the half cross section of the conductor

Portion of the conductor near the surface carries less current and the core of the conductor carries more current

Uniform current flows through the conductor

Portion of the conductor near the surface carries more current and the core of the conductor carries less current

Current flows through the half cross section of the conductor

Portion of the conductor near the surface carries less current and the core of the conductor carries more current

Uniform current flows through the conductor

Portion of the conductor near the surface carries more current and the core of the conductor carries less current

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DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

The force increases when the distance between the conductors is decreased

The force increases when the distance between the conductors is increased

There is an attracting force between the conductors

There is a repelling force between the conductors

The force increases when the distance between the conductors is decreased

The force increases when the distance between the conductors is increased

There is an attracting force between the conductors

There is a repelling force between the conductors

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DGVCL Exam Paper (11-12-2011)
A Mho relay is a

Directional restrained over current relay

Directional restrained over voltage relay

Voltage restrained directional relay

Voltage controlled over current relay

Directional restrained over current relay

Directional restrained over voltage relay

Voltage restrained directional relay

Voltage controlled over current relay

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

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

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) Due to skin effect

DGVCL Exam Paper (11-12-2011) Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

DGVCL Exam Paper (11-12-2011) A Mho relay is a

DGVCL Exam Paper (11-12-2011)
A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

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

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)
Due to skin effect

DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

DGVCL Exam Paper (11-12-2011)
A Mho relay is a