Fot fast load flow calculations, the best method is

DGVCL Exam Paper (11-12-2011)
Fot fast load flow calculations, the best method is

Approximate method

Gauss-Siedal

De-coupled method

Newton-Raphson

Approximate method

Gauss-Siedal

De-coupled method

Newton-Raphson

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DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

Low copper loss

Low copper as well as iron loss

Low iron loss

Low voltage

Low copper loss

Low copper as well as iron loss

Low iron loss

Low voltage

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DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

There is an attracting force between the conductors

The force increases when the distance between the conductors is decreased

There is a repelling force between the conductors

The force increases when the distance between the conductors is increased

There is an attracting force between the conductors

The force increases when the distance between the conductors is decreased

There is a repelling force between the conductors

The force increases when the distance between the conductors is increased

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DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

0.6 lagging

0.8 lagging

0.5 leading

0.6 leading

0.6 lagging

0.8 lagging

0.5 leading

0.6 leading

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DGVCL Exam Paper (11-12-2011)
Which motor is used to start heavy loads?

Shunt motor

Differentially compounded motor

Series motor

Cumulatively compounded motor

Shunt motor

Differentially compounded motor

Series motor

Cumulatively compounded motor

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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

More than 90%

Less than 90%

80 %

90 %

More than 90%

Less than 90%

80 %

90 %

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) Fot fast load flow calculations, the best method is

DGVCL Exam Paper (11-12-2011) Distribution transformers have good all day efficiency due to

DGVCL Exam Paper (11-12-2011) Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

DGVCL Exam Paper (11-12-2011) An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011) Which motor is used to start heavy loads?

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)
Fot fast load flow calculations, the best method is

DGVCL Exam Paper (11-12-2011)
Distribution transformers have good all day efficiency due to

DGVCL Exam Paper (11-12-2011)
Two parallel conductors are carrying the current in the same direction. Which of the following statements is correct?

DGVCL Exam Paper (11-12-2011)
An AC series circuit has R = 6 Ω, XL = 20 Ω and Xc = 12 Ω. The ciruit power factor will be

DGVCL Exam Paper (11-12-2011)
Which motor is used to start heavy loads?

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