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 'Assistant Engineer (Electrical) - Kerala State Electricity Board Ltd' And exam conducted in the year 2023. And Question paper code was '225/2023'. 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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The prominent ripple frequency at the output of a three-phase fully controlled rectifier
operating at 50 Hz is:
(A) 5012 (B) 100 Hz
(C) 150 Hz 0) 300 Hz
To eliminate the 5 harmonic from the output of a single pulse PWM inverter, the width of
pulse should be:
(A) 90° (B) 32°
(C) 72° (D) 30°
For a three-phase bridge inverter operating in 180° mode of conduction, a maximum of:
(A) 2 power switches conduct simultaneously
(B) 3 power switches conduct simultaneously
(C) 4 power switches conduct simultaneously
(D) No restriction
The continuous or discontinuous mode of conduction of a chopper is influenced by :
(A) Switching frequency (B) Duty ratio
(C) Inductance and resistance values (D) All of these
For an ideal op-amp, which one is not applicable:
(A) Infinite input resistance ൯) Infinite output resistance
(C) Infinite bandwidth (D) Infinite CMRR
The maximum frequency of operation of an Op-amp without distortion is decided by its:
(A) Bandwidth (B)_ Slew rate
(C) CMRR (D) Voltage gain
The unit of Slew rate is:
(A) Als رمق us
(©) Vius 0) No unit
An op - amp operating at a high electromagnetically noisy environment should have:
(A) High CMRR (B) Low CMRR
(C) Not decided based on CMRR (D) Zero CMRR
13 225/2023
[P.T.0.]