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GETCO Exam Paper (22-07-2015)

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

L-L
L-G
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

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

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GETCO Exam Paper (22-07-2015)
A transformer has negative voltage regulation when its load PF is

zero
unity
lagging
leading

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Voltage regulation = ((no load voltage)-(full load voltage)/(no load voltage))
VR at leading PF = ((I*R*cosφ)-(I*X*sinφ))/V
VR at lagging PF = ((I*R*cosφ)+(I*X*sinφ))/V

GETCO Exam Paper (22-07-2015)
In which of the following festivals are boat races a special feature?

Onam
Navaratri
Rongali Bihu
Pongal

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GETCO Exam Paper (22-07-2015)
For formation of the Y bus matrix (using node voltage analysis) in power system network modelling _____ is used

Faraday's law
KCL
KVL
all are correct

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

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

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