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?

Breaker backup

Remote backup

Relay backup

Control backup

Breaker backup

Remote backup

Relay backup

Control backup

ANSWER DOWNLOAD EXAMIANS APP

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 %

More than 90%

80 %

Less than 90%

90 %

More than 90%

80 %

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

An inverse time current characteristic

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

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

An inverse time current characteristic

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

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

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

Under reach

Pick up

Over reach

Reach

Under reach

Pick up

Over reach

Reach

ANSWER DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

Split phase motor

Capacitor start capacitor run motor

Capacitor start motor

Universal motor

Split phase motor

Capacitor start capacitor run motor

Capacitor start motor

Universal motor

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

DGVCL Exam Paper (11-12-2011)
The positive and negative sequence impedance of a transmission line are

Different

Zero

Equal

Infinite

Different

Zero

Equal

Infinite

ANSWER DOWNLOAD EXAMIANS APP

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) 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) An IDMT relay provides

DGVCL Exam Paper (11-12-2011) If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

DGVCL Exam Paper (11-12-2011) The motor used in celling fans is

DGVCL Exam Paper (11-12-2011) The positive and negative sequence impedance of a transmission line are

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)
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)
An IDMT relay provides

DGVCL Exam Paper (11-12-2011)
If a relay fails to operate inspite of a fault in its own zone of protection, it is said to

DGVCL Exam Paper (11-12-2011)
The motor used in celling fans is

DGVCL Exam Paper (11-12-2011)
The positive and negative sequence impedance of a transmission line are