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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
Calculate torque developed by the 3-phase, 5 HP, 4 pole induction motor runs at 1500 rpm

22 N-m
23.5 N-m
0 N-m
10 N-m

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

P = 2πTN/60 where N is speed in rpm

GETCO Exam Paper (22-07-2015)
Light from the nearest star (other than the sun) reaches the earth in

4.2 years
4.2 hours
4.2 minutes
42 secs

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

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

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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

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

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GETCO Exam Paper (22-07-2015)
The magnitude of sum of two sinusoidal AC voltages is equal to the magnitude of each individual voltage, What must be the phase difference between voltages?

180
120
90
60

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

small inductive current
asymmetrical current
resistance switching
capacitance switching

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

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