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

60 MVA

10 MVA

50 MVA

20 MVA

60 MVA

10 MVA

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DGVCL Exam Paper (11-12-2011)
An IDMT relay provides

An inverse time current characteristic

A definite time cuttent characteristic

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current

A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current

An inverse time current characteristic

A definite time cuttent characteristic

An inverse characteristic for low values of the fault current and a definite time characteristic for high values of the fault current

A definite time characteristic for low values of the failt current and an inverse characteristic for high values of the fault current

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

Tripping for both major and minor faults

Alarm for both major and minor faults

Tripping for major faults and alarm for minor faults

Tripping for minor faults and alarm for major faults

Tripping for both major and minor faults

Alarm for both major and minor faults

Tripping for major faults and alarm for minor faults

Tripping for minor faults and alarm for major faults

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DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

Less than 90%

90 %

80 %

More than 90%

Less than 90%

90 %

80 %

More than 90%

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

Harmonics in the generated emf

Size of the machine

Amount of copper in the winding

Cost of the machine

Harmonics in the generated emf

Size of the machine

Amount of copper in the winding

Cost of the machine

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DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance

Current is minimum and power factor is unity

Current is minimum and power factor is 0.5

Current is maximum and power factor is 0.5

Current is maximum and power factor is unity

Current is minimum and power factor is unity

Current is minimum and power factor is 0.5

Current is maximum and power factor is 0.5

Current is maximum and power factor is unity

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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) An IDMT relay provides

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

DGVCL Exam Paper (11-12-2011) The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

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

DGVCL Exam Paper (11-12-2011) In a series RLC circuit at resonance

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)
An IDMT relay provides

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

DGVCL Exam Paper (11-12-2011)
The efficiency of a transformer at full load, 0.8 p.f. lag is 90%. Its efficiency at full load, 0.8 p.f. lead will be

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

DGVCL Exam Paper (11-12-2011)
In a series RLC circuit at resonance