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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
During the insulation co-ordination in the sub station, the lowest insulation strength is at

circuit breaker
bus bar
transformer
CTs and PTs

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GETCO Exam Paper (22-07-2015)
The Z matrix of 2 port network is given by [0.9 0.2 : 0.2 0.6]. The element Y22 of the corresponding Y matrix of the same network is given by

1.2
-0.4
1.8
0.4

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GETCO Exam Paper (22-07-2015)
In load flow analysis, the load at the bus is represented as

a constant impedance connected at the bus
none of these
a voltag dependent impedance at the bus
a constant current drawn from the bus

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GETCO Exam Paper (22-07-2015)
The value of holding ratio of relay is always

greater than 1
zero
Infinite
less than 1

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GETCO Exam Paper (22-07-2015)
Merz-Price protection is employed for protection of

alternators
circuit breaker
motor
transmission lines

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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

100
300
200
150

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