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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
The best location of the power factor correction equipment to be installed in the transmission line is at

The sending end
Any place
The receiving end
Middle of the line

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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

6 %
5 %
0.4 %
4 %

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Ns = 120f/P
Slip=(Ns-Nr)/Ns
Ns = 1000 and Nr = 960
from equation of slip, S = (1000-960)/1000
S = 0.04 or 4%

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

Zero
Different
Equal
Infinite

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DGVCL Exam Paper (11-12-2011)
The transient stability of a power system can be improved by

Excitation control
Single pole switching of circuit breakers
Phase shifting transformer
Increasing the turbine valve opening

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DGVCL Exam Paper (11-12-2011)
All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

AC
DC
Positive cycle of sine wave
Negative cycle of sine wave

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DGVCL Exam Paper (11-12-2011)
The insulation coordination for UHV lines (above 500 kV) is done based on

Lightning and switching surges
Lightning surges
Voltage level of the line
Switching surges

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MORE MCQ ON DGVCL Exam Paper (11-12-2011)

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