The insulation coordination for UHV lines (above 500 kV) is done based on

DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

Lightning surges

Voltage level of the line

Lightning and switching surges

Switching surges

Lightning surges

Voltage level of the line

Lightning and switching surges

Switching surges

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DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

Amount of copper in the winding

Size of the machine

Harmonics in the generated emf

Cost of the machine

Amount of copper in the winding

Size of the machine

Harmonics in the generated emf

Cost of the machine

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DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

Switching over voltages

Lightning

Unbalanced protection

Magnetizing inrush current

Switching over voltages

Lightning

Unbalanced protection

Magnetizing inrush current

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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

Eliminate hunting and provide adequate starting torque

Reduce winding losses

Eliminate losses on account of fair friction

Reduce bearing friction

Eliminate hunting and provide adequate starting torque

Reduce winding losses

Eliminate losses on account of fair friction

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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

Synchronous motor

Reluctance motor

Universal motor

Induction motor

Synchronous motor

Reluctance motor

Universal motor

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DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of

R.M.S. value to average value

Peak value to average value

Peak value to r.m.s value

R.M.S. value to peak value

R.M.S. value to average value

Peak value to average value

Peak value to r.m.s value

R.M.S. value to peak value

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) The insulation coordination for UHV lines (above 500 kV) is done based on

DGVCL Exam Paper (11-12-2011) The main advantage of using fractional pitch winding is to refuce

DGVCL Exam Paper (11-12-2011) In the protection of transformers, harmonic restraint is used to guard against

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

DGVCL Exam Paper (11-12-2011) The form factor in AC means the ration of

DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

DGVCL Exam Paper (11-12-2011)
The main advantage of using fractional pitch winding is to refuce

DGVCL Exam Paper (11-12-2011)
In the protection of transformers, harmonic restraint is used to guard against

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

DGVCL Exam Paper (11-12-2011)
The form factor in AC means the ration of