Efficiency of a power transformer is of the order of :

DGVCL Exam Paper (12-06-2016)
Efficiency of a power transformer is of the order of :

0.5

0.25

0.98

1

0.5

0.25

0.98

1

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DGVCL Exam Paper (12-06-2016)
A Step Up transformer :

Steps up the level of Voltage

Steps down the level of current

Step up the level of Frequency

(a) and (b) only

Steps up the level of Voltage

Steps down the level of current

Step up the level of Frequency

(a) and (b) only

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DGVCL Exam Paper (12-06-2016)
A relay used for protection of motors against overload is :

Electromagnetic attraction type

Thermal relay

Buchholz's relay

Impedance relay

Electromagnetic attraction type

Thermal relay

Buchholz's relay

Impedance relay

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DGVCL Exam Paper (12-06-2016)
The number of cycles in which a high speed circuit breaker can complete its operation is

20 to 30

3 to 8

40 to 50

10 to 18

20 to 30

3 to 8

40 to 50

10 to 18

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DGVCL Exam Paper (12-06-2016)
For 11 kV line the capacitance per km per phase will be of the order of:

1 Farad

0.01 Farad

0.1 Farad

0.01 microF

1 Farad

0.01 Farad

0.1 Farad

0.01 microF

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DGVCL Exam Paper (12-06-2016)
The following formula is correct:

Load factor = Average load for a period x Peak load for the same period

Load facto r= Average load for a period/Peak load for the same period

All of these

Load factor = Average load for a period + Peak load for the same period

Load factor = Average load for a period x Peak load for the same period

Load facto r= Average load for a period/Peak load for the same period

All of these

Load factor = Average load for a period + Peak load for the same period

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DGVCL Exam Paper (12-06-2016)

DGVCL Exam Paper (12-06-2016) Efficiency of a power transformer is of the order of :

DGVCL Exam Paper (12-06-2016) A Step Up transformer :

DGVCL Exam Paper (12-06-2016) A relay used for protection of motors against overload is :

DGVCL Exam Paper (12-06-2016) The number of cycles in which a high speed circuit breaker can complete its operation is

DGVCL Exam Paper (12-06-2016) For 11 kV line the capacitance per km per phase will be of the order of:

DGVCL Exam Paper (12-06-2016) The following formula is correct:

DGVCL Exam Paper (12-06-2016)
Efficiency of a power transformer is of the order of :

DGVCL Exam Paper (12-06-2016)
A Step Up transformer :

DGVCL Exam Paper (12-06-2016)
A relay used for protection of motors against overload is :

DGVCL Exam Paper (12-06-2016)
The number of cycles in which a high speed circuit breaker can complete its operation is

DGVCL Exam Paper (12-06-2016)
For 11 kV line the capacitance per km per phase will be of the order of:

DGVCL Exam Paper (12-06-2016)
The following formula is correct: