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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
Switching surges are

short duration transient voltage
high votage DCs
high voltage Acs
power frequency voltage

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GETCO Exam Paper (22-07-2015)
Which of the following is the most likely reason for large overshoot in a control system?

high retarding torque
presence of dead time delay
High gain in a system
high positive correcting torque

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GETCO Exam Paper (22-07-2015)
In a DC motor, back EMF value becomes maximum at _____

3/4 load
1/2 load
no load
full load

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Answer in official key is “1/2 load ”.

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

circuit breaker
transmission lines
alternators
motor

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

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

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

P = 2πTN/60 where N is speed in rpm

GETCO Exam Paper (22-07-2015)
In differential protection scheme, a stabilizing resistance connected to

reduce the effect of non identical CTs
increase the current limit
increase the relay sensitivity
block harmonics

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

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