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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
What type of insulator is used if the direction of the transmission line is to be changed?

Pin type
Strain type
Suspebsion type
Shakle type

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DGVCL Exam Paper (11-12-2011)
Under operating conditions, the secondary of a current transformer is always short ciruited because

It protects the primary ciruits
It protects the secondary ciruits
It is safe to human beings
It avoids core saturation and high voltage induction

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DGVCL Exam Paper (11-12-2011)
In carrier current protection, the purpose of the wave trap is for

All of these
Tripping fault current
Trapping high frequency waves entering into generator/transformer unit.
Trapping power frequency waves

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DGVCL Exam Paper (11-12-2011)
Ybus used in power flow studies and Zbus used in short circuit studies

Are the same
Are transpose of each other
Have no inter relation
Are inverse of each other

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DGVCL Exam Paper (11-12-2011)
What happens to the contents of RAM (Random Access Memory) when the power of the computer is turned off?

Content remains intact
Content is lost
Content gets corrupted
Content is transferred to other memory

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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

5 %
6 %
0.4 %
4 %

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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%

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

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