Which type of back up protection is widely used for the protection of transmission lines?

DGVCL Exam Paper (11-12-2011)
Which type of back up protection is widely used for the protection of transmission lines?

Relay backup

Remote backup

Breaker backup

Control backup

Relay backup

Remote backup

Breaker backup

Control backup

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DGVCL Exam Paper (11-12-2011)
A Mho relay is a

Voltage restrained directional relay

Voltage controlled over current relay

Directional restrained over current relay

Directional restrained over voltage relay

Voltage restrained directional relay

Voltage controlled over current relay

Directional restrained over current relay

Directional restrained over voltage relay

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DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

The demagnetizing effect of armature mmf

The reactance voltage

Both the cross-magnetizing mmf and the reactance voltage

The cross-magnetizing effect of armature mmf

The demagnetizing effect of armature mmf

The reactance voltage

Both the cross-magnetizing mmf and the reactance voltage

The cross-magnetizing effect of armature mmf

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

Are transpose of each other

Are inverse of each other

Have no inter relation

Are the same

Are transpose of each other

Are inverse of each other

Have no inter relation

Are the same

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

Low copper as well as iron loss

Low voltage

Low copper loss

Low iron loss

Low copper as well as iron loss

Low voltage

Low copper loss

Low iron loss

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

To avoid radio interference

To limit the current to an appropriate value

To eliminate corona effect

To improve the power factor

To avoid radio interference

To limit the current to an appropriate value

To eliminate corona effect

To improve the power factor

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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011) Which type of back up protection is widely used for the protection of transmission lines?

DGVCL Exam Paper (11-12-2011) A Mho relay is a

DGVCL Exam Paper (11-12-2011) The purpose of interpoles in DC machines is to nullify

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) Distribution transformers have good all day efficiency due to

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

DGVCL Exam Paper (11-12-2011)
Which type of back up protection is widely used for the protection of transmission lines?

DGVCL Exam Paper (11-12-2011)
A Mho relay is a

DGVCL Exam Paper (11-12-2011)
The purpose of interpoles in DC machines is to nullify

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)
Distribution transformers have good all day efficiency due to

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