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GETCO EXAM PAPER (22-07-2015)

GETCO Exam Paper (22-07-2015)
For a given transformer volte/turn for primary and secondary winding is

depends on load
same
depends on transformer design
different

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

emf = 4.44*f*φ*T
emf/T = 4.44*f*φ

GETCO Exam Paper (22-07-2015)
No load efficiency of tranformer is _____ than full load efficiency

same
depends on load
lesser
greater

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (22-07-2015)
Speed of induction motor at rated torque is _____ than at maximum torque.

lesser
depends on load
greater
same

ANSWER DOWNLOAD EXAMIANS APP

GETCO Exam Paper (22-07-2015)
The mechanical angle is _____ electrical angle

same
greater than or equal to
lesser than or equal to
always less

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Electrical angle = (P/2)*mechanicla angle

GETCO Exam Paper (22-07-2015)
Slip at maximum torque depends on

stator reactance
load current
rotor resistance and reactance
stator resistance

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

at maximum torque:
S=R₂/X₂

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