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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
The PU impedance of a 1089 MVA, 33 kV generator is 1, the ohmic value of its impedance is:

10
100
1
0.5

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GETCO Exam Paper (22-07-2015)
In synchronous motor, V-curve is a graph of

Armature current Vs power factor
Armature current Vs Field current
Armature current Vs reactive power
Armature current Vs active power

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

v curve: armature current → field current
Inverted V curve: power factor → field current

GETCO Exam Paper (22-07-2015)
In sub stations for making and breaking of load current

load interrupter switches are used
relays are used
isolators are used
circuit breakers are used

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GETCO Exam Paper (22-07-2015)
Power Factor correcting element is generally connected in _____

series with load
parallel to source
parallel to the load
series with source

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GETCO Exam Paper (22-07-2015)
Who was the political Guru of Netaji?

R. Das
Sardar Patel
Gokhle
Lokmanya Tilak

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

leading
zero
unity
lagging

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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

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