Ybus used in power flow studies and Zbus used in short circuit studies

DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are inverse of each other

Are the same

Are transpose of each other

Have no inter relation

Are inverse of each other

Are the same

Are transpose of each other

Have no inter relation

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

Newton-Raphson

Gauss-Siedal

Approximate method

De-coupled method

Newton-Raphson

Gauss-Siedal

Approximate method

De-coupled method

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

Low copper loss

Low iron loss

Low copper as well as iron loss

Low voltage

Low copper loss

Low iron loss

Low copper as well as iron loss

Low voltage

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DGVCL Exam Paper (11-12-2011)
If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

Extinguish

Restrike

Decrease in size

Increase in size

Extinguish

Restrike

Decrease in size

Increase in size

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DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

Points

Pixels

Spots

Icons

Points

Pixels

Spots

Icons

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DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is

To limit the current to an appropriate value

To improve the power factor

To avoid radio interference

To eliminate corona effect

To limit the current to an appropriate value

To improve the power factor

To avoid radio interference

To eliminate corona effect

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) Ybus used in power flow studies and Zbus used in short circuit studies

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) If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

DGVCL Exam Paper (11-12-2011) The picture on the monitor of a computer is made up of tiny coloured dots called

DGVCL Exam Paper (11-12-2011) The purpose of providing a choke in a tube light is

DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

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)
If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will

DGVCL Exam Paper (11-12-2011)
The picture on the monitor of a computer is made up of tiny coloured dots called

DGVCL Exam Paper (11-12-2011)
The purpose of providing a choke in a tube light is