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DGVCL Exam Paper (11-12-2011)

DGVCL Exam Paper (11-12-2011)
If the percentage reactance of the system upto the point of fault is 20% and the base kVA is 10,000 the short ciruit kVA is

10 MVA
20 MVA
50 MVA
60 MVA

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Short circuit kVA = Base kVA/%X

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

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

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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 receiving end
The sending end
Any place
Middle of the line

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DGVCL Exam Paper (11-12-2011)
Which motor is used to start heavy loads?

Cumulatively compounded motor
Differentially compounded motor
Shunt motor
Series motor

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Torque in d.c motor = k* φ * Ia
In series motor φ α Ia
Tα I²
starting torque of dc series motor is high

DGVCL Exam Paper (11-12-2011)
The mutual inductance between two unity coupled coils of 9 H and 4 H is

2.2 H
6 H
13 H
36 H

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DGVCL Exam Paper (11-12-2011)
The circuit breaker generally used in railway traction is

Air break CB
Minimum Oil CB
Vacuum CB
Bulk Oil CB

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

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