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?

Control backup

Relay backup

Breaker backup

Remote backup

Control backup

Relay backup

Breaker backup

Remote backup

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

Low voltage

Low iron loss

Low copper as well as iron loss

Low copper loss

Low voltage

Low iron loss

Low copper as well as iron loss

Low copper loss

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

The length of the conductor

Both spacing between the conductors and diameter of the conductor

Spacing between the conductors

Diameter of the conductor

The length of the conductor

Both spacing between the conductors and diameter of the conductor

Spacing between the conductors

Diameter of the conductor

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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

60 MVA

10 MVA

20 MVA

50 MVA

60 MVA

10 MVA

20 MVA

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DGVCL Exam Paper (11-12-2011)
The effect of electric shock on the human body depends on

Current

Duration of contact

Voltage

All of these

Current

Duration of contact

Voltage

All of these

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DGVCL Exam Paper (11-12-2011)
A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

0.4 %

6 %

4 %

5 %

0.4 %

6 %

4 %

5 %

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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) Distribution transformers have good all day efficiency due to

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

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) The effect of electric shock on the human body depends on

DGVCL Exam Paper (11-12-2011) A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be

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)
Distribution transformers have good all day efficiency due to

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

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)
The effect of electric shock on the human body depends on

DGVCL Exam Paper (11-12-2011)
A 3 phase, 6 pole induction motor operates on 440 V, 50 Hz, supply. If the actual speed of the motor is 960 rpm the slip will be