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

5 %

6 %

0.4 %

4 %

5 %

6 %

0.4 %

4 %

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DGVCL Exam Paper (11-12-2011)
The purpose of skewing of rotor slots in an induction motor is

To reduce the locking tendency of the rotor

To increase the distributuion factor

To reduce the magnetic hum of the motor

To increase the breadth factor

To reduce the locking tendency of the rotor

To increase the distributuion factor

To reduce the magnetic hum of the motor

To increase the breadth factor

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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

Reduce winding losses

Eliminate hunting and provide adequate starting torque

Eliminate losses on account of fair friction

Reduce bearing friction

Reduce winding losses

Eliminate hunting and provide adequate starting torque

Eliminate losses on account of fair friction

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DGVCL Exam Paper (11-12-2011)
The bus bar zone faults are generally

Single line to ground faults

Double line to ground faults

Three phase short ciruits

Phase to phase faults

Single line to ground faults

Double line to ground faults

Three phase short ciruits

Phase to phase faults

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DGVCL Exam Paper (11-12-2011)
It is difficult interrupt a capacitive current because

The restriking voltage can be high

Current magnitude is very small

Stored energy in the capacitor is very high

It has a leading power factor

The restriking voltage can be high

Current magnitude is very small

Stored energy in the capacitor is very high

It has a leading power factor

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DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a

Induction generator

Synchronous motor

Induction motor

Synchronous generator

Induction generator

Synchronous motor

Induction motor

Synchronous generator

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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) The purpose of skewing of rotor slots in an induction motor is

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) The bus bar zone faults are generally

DGVCL Exam Paper (11-12-2011) It is difficult interrupt a capacitive current because

DGVCL Exam Paper (11-12-2011) If the excitation of a synchronous generator fails, it acts as 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)
The purpose of skewing of rotor slots in an induction motor is

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)
The bus bar zone faults are generally

DGVCL Exam Paper (11-12-2011)
It is difficult interrupt a capacitive current because

DGVCL Exam Paper (11-12-2011)
If the excitation of a synchronous generator fails, it acts as a