Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Instructor Gr I (Electrical Engineering) - Technical Education' And exam conducted in the year 2020. And Question paper code was '059/2020'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. 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.
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A forward voltage can be applied to SCR after its
A) Anode current reduces to zero B) Gate recovery time
C) Anode voltage reduces to zero D) Reverse recovery time
Synchronous motor is normally used for driving
A) Cranes B) Lathes
C) Fans D) Rotating compressors
In moving iron instrument, the deflecting torque is proportional to
A) 12 B) |
©) 1/12 0) None of these
Corona loss increases with
A) Increase in supply frequency and conductor size
) Increase in supply frequency but reduction in conductor size
C) Decrease in supply frequency and conductor size
) Decrease in supply frequency but increase in conductor size
If the excitation of a synchronous generator fails, it acts as a
A) Synchronous motor B) Synchronous generator
C) Induction generator D) Induction motor
The device that does not have the gate terminal is
A) Triac B) FET ©) SCR D) Diac
A string insulator has 5 units. The voltage across the bottom most unit is 25% of the
total voltage. String efficiency is
A) 25% B) 50%
C) 80% D) 75%
Resistance switching is normally employed in the case of
A) Bulk oil circuit breaker B) Minimum oil circuit breaker
C) Air blast circuit breaker D) All of the above
An ohmmeter is a
A) Moving iron instrument B) Moving coil instrument
C) Dynamometer instrument D) None of the above