If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011)
If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

50 MVA

20 MVA

10 MVA

60 MVA

50 MVA

20 MVA

10 MVA

60 MVA

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DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

Trapping power frequency waves

All of these

Trapping high frequency waves entering into generator/transformer unit.

Tripping fault current

Trapping power frequency waves

All of these

Trapping high frequency waves entering into generator/transformer unit.

Tripping fault current

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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

Magnetizing inrush current

Unbalanced protection

Switching over voltages

Lightning

Magnetizing inrush current

Unbalanced protection

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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

Eliminate losses on account of fair friction

Eliminate hunting and provide adequate starting torque

Reduce bearing friction

Reduce winding losses

Eliminate losses on account of fair friction

Eliminate hunting and provide adequate starting torque

Reduce bearing friction

Reduce winding losses

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DGVCL Exam Paper (11-12-2011)
The corona effect can be minimized by increasing

Diameter of the conductor

The length of the conductor

Spacing between the conductors

Both spacing between the conductors and diameter of the conductor

Diameter of the conductor

The length of the conductor

Spacing between the conductors

Both spacing between the conductors and diameter of the conductor

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DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Capacitor start capacitor run motor

Capacitor start motor

Split phase motor

Universal motor

Capacitor start capacitor run motor

Capacitor start motor

Split phase motor

Universal motor

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011) In carrier current protection, the purpose of the wave trap is for

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) The corona effect can be minimized by increasing

DGVCL Exam Paper (11-12-2011) The motor used in celling fans is

DGVCL Exam Paper (11-12-2011)
If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

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)
The corona effect can be minimized by increasing

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is