Kerala PSC Previous Years Question Paper & Answer
Page:14
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Materials Manager' And exam conducted in the year 2023. And Question paper code was '163/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
Question65:-A 4 pole three phase induction motor operates from 440 V, 50 Hz
supply. At 4% slip, the speed of the motor is
A:-1500 rpm
B:-1400 rpm
C:-1440 rpm
D:-None of the above
Correct Answer:- Option-C
Question66:-The rotor resistance and leakage reactance of an induction motor is ௩,
and x, respectively. If the stator impedance is neglected, the maximum torque of an
induction motor occurs at a slip of
A:-Slip = 2 / X2
B:-Slip = 0
C:-Slip = 1
D:-None of the above
Correct Answer:- Option-A
Question67:-During blocked rotor test on induction motor, the power drawn by the
motor is mainly for
A:-Copper loss and core loss
B:-Copper loss
C:-Core loss
D:-None of the above
Correct Answer:- Option-B
Question68:-A synchronous motor can be used as a synchronous condenser at
A:-Over excited
B:-Under excited
C:-Both (1) and (2)
D:-None of the above
Correct Answer:- Option-A
Question69:-Prime mover for a salient pole synchronous generator is
A:-Steam turbine
B:-Hydro turbine
C:-(1) or (2)
D:-None of the above
Correct Answer:- Option-B
Question70:-The maximum power output of a synchronous generator having
synchronous reactance of X, generated emf E and terminal voltage V is
A:-EV/X