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 %

0.4 %

4 %

6 %

5 %

0.4 %

4 %

6 %

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DGVCL Exam Paper (11-12-2011)
At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

Conductor

Voltage source

Capacitor

Resistor

Conductor

Voltage source

Capacitor

Resistor

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DGVCL Exam Paper (11-12-2011)
Buchholz relay causes

Alarm for both major and minor faults

Tripping for both major and minor faults

Tripping for minor faults and alarm for major faults

Tripping for major faults and alarm for minor faults

Alarm for both major and minor faults

Tripping for both major and minor faults

Tripping for minor faults and alarm for major faults

Tripping for major faults and alarm for minor faults

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

Current magnitude is very small

It has a leading power factor

The restriking voltage can be high

Stored energy in the capacitor is very high

Current magnitude is very small

It has a leading power factor

The restriking voltage can be high

Stored energy in the capacitor is very high

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DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

Icons

Pixels

Spots

Points

Icons

Pixels

Spots

Points

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The cross-magnetizing effect of armature mmf

Both the cross-magnetizing mmf and the reactance voltage

The demagnetizing effect of armature mmf

The reactance voltage

The cross-magnetizing effect of armature mmf

Both the cross-magnetizing mmf and the reactance voltage

The demagnetizing effect of armature mmf

The reactance voltage

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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) At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

DGVCL Exam Paper (11-12-2011) Buchholz relay causes

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

DGVCL Exam Paper (11-12-2011) The picture on the monitor of a computer is made up of tiny coloured dots called

DGVCL Exam Paper (11-12-2011) The purpose of interpoles in DC machines is to nullify

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)
At time t= 0+ , with zero initial condition, which of the following acts as a short circuit?

DGVCL Exam Paper (11-12-2011)
Buchholz relay causes

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

DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify