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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
In rotating electrical machines, the insulation temperature limit for class B type is

180˚C
150˚C
130˚C
105˚C

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

insulation Class and temperature limit(in ˚C) is given below:
Y - 90
A- 105
E- 120
B-130
F-155
H-180
C- above 180

GETCO Exam Paper (22-07-2015)
The fault occurring in transmission actually are mostly

L-G
L-L
L-L-L
L-L-G

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GETCO Exam Paper (22-07-2015)
In case of a balanced three phase sinusoidal AC supply, because of the phase difference

rotating magnetic field is produced
all are correct
neutral wire is not required, if load is balanced
neutral current is high if load is not balanced

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GETCO Exam Paper (22-07-2015)
The steady state stability of the power systems is most effected by

transmission line reactance
stability of generator
power factor of the load
voltage at generator bus

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GETCO Exam Paper (22-07-2015)
An over-current relay of current rating 5 A and setting 150% is connected to a 200/5 A CT. Then the relay to pickup, the line current required is

200
100
300
150

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GETCO Exam Paper (22-07-2015)
Current chopping phenomenon is related to

capacitance switching
small inductive current
asymmetrical current
resistance switching

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MORE MCQ ON GETCO Exam Paper (22-07-2015)

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