In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

Induction motor

Universal motor

Reluctance motor

Synchronous motor

Induction motor

Universal motor

Reluctance motor

Synchronous motor

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

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

Uniform current flows through the conductor

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

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

Uniform current flows through the conductor

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

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

50 % of its full length

25 % of its full length

80 % of its full length

Its full length

50 % of its full length

25 % of its full length

80 % of its full length

Its full length

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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

4 %

0.4 %

5 %

6 %

4 %

0.4 %

5 %

6 %

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DGVCL Exam Paper (11-12-2011)
Which lightning stroke is most dangerous?

Direct stoke on tower top

Direct stroke on ground wire

Direct stroke on line conductor

Indirect stroke on conductor

Direct stoke on tower top

Direct stroke on ground wire

Direct stroke on line conductor

Indirect stroke on conductor

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

Phase to phase faults

Single line to ground faults

Three phase short ciruits

Double line to ground faults

Phase to phase faults

Single line to ground faults

Three phase short ciruits

Double line to ground faults

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

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

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

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) Which lightning stroke is most dangerous?

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

DGVCL Exam Paper (11-12-2011)
In which of the following motors, the stator and rotor magnetic fields rotate at the same speed?

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

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

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)
Which lightning stroke is most dangerous?

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