The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be

GETCO Exam Paper (30-11-2008)
The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be

zero

-2.5%

0.01

2.5%

zero

-2.5%

0.01

2.5%

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GETCO Exam Paper (30-11-2008)
Corona usually occurs when the electrostatic stress in the air around the conductor succeeds

22 kV (maximum value)/cm

6.6 kV (rms value)/cm

30 kV (maximum value)/cm

11 kV (rms value)/cm

22 kV (maximum value)/cm

6.6 kV (rms value)/cm

30 kV (maximum value)/cm

11 kV (rms value)/cm

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GETCO Exam Paper (30-11-2008)
Transmission efficiency increases as

voltage and power factor both decrease

voltage decreases but power factor increases

voltage increases but power factor decreases

voltage and power factor both increase

voltage and power factor both decrease

voltage decreases but power factor increases

voltage increases but power factor decreases

voltage and power factor both increase

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GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

any of the above

saturation of magnetic circuit

over load

large internal fault

any of the above

saturation of magnetic circuit

over load

large internal fault

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

GETCO Exam Paper (30-11-2008)
Power system A is operating in parallel with other systems and has a frequency bias of 50 MW/0.1 Hz. For a loss of generation in one of the interconnected systems resulting in a frequency drop of 0.02 Hz, system A should

provide 30 MW support

provide 20 MW of support

provide 10 MW of support

not be affected

provide 30 MW support

provide 20 MW of support

provide 10 MW of support

not be affected

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GETCO Exam Paper (30-11-2008)
Which of the following regulation is considered to be the best

0.98

0.02

0.7

0.3

0.98

0.02

0.7

0.3

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (30-11-2008)

GETCO Exam Paper (30-11-2008) The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be

GETCO Exam Paper (30-11-2008) Corona usually occurs when the electrostatic stress in the air around the conductor succeeds

GETCO Exam Paper (30-11-2008) Transmission efficiency increases as

GETCO Exam Paper (30-11-2008) A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008) Power system A is operating in parallel with other systems and has a frequency bias of 50 MW/0.1 Hz. For a loss of generation in one of the interconnected systems resulting in a frequency drop of 0.02 Hz, system A should

GETCO Exam Paper (30-11-2008) Which of the following regulation is considered to be the best

GETCO Exam Paper (30-11-2008)
The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be

GETCO Exam Paper (30-11-2008)
Corona usually occurs when the electrostatic stress in the air around the conductor succeeds

GETCO Exam Paper (30-11-2008)
Transmission efficiency increases as

GETCO Exam Paper (30-11-2008)
A buchholz will operate in a transformer whenever there is

GETCO Exam Paper (30-11-2008)
Power system A is operating in parallel with other systems and has a frequency bias of 50 MW/0.1 Hz. For a loss of generation in one of the interconnected systems resulting in a frequency drop of 0.02 Hz, system A should

GETCO Exam Paper (30-11-2008)
Which of the following regulation is considered to be the best