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 'Junior Instructor (Electronic Mechanic)' And exam conducted in the year 2023. And Question paper code was '081/2023/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.
C:-(ii) and (iv)
D:-(i) and (iii)
Correct Answer:- Option-D
Question21:-Which coupling scheme is preferred for a multistage amplifier used to
amplify signals below 10 Hz?
A:-Direct coupling
B:-Transformer coupling
C:-RC coupling
D:-All of the above
Correct Answer:- Option-A
Question22:-Which of the following oscillator circuits is suitable to generate audio
frequency signals?
A:-Hartley oscillator
B:-Crystal oscillator
C:-Colpitts oscillator
D:-Wien bridge oscillator
Correct Answer:- Option-D
Question23:-Which of the following circuit can be used as a memory element?
A:-Monostable Multivibrator
B:-Bistable Multivibrator
C:-Astable Multivibrator
D:-All of the above
Correct Answer:- Option-B
Question24:-The differential mode gain of an op-amp is 10 . If the common mode
gain is 0.1, what is its CMRR?
^; -10-6
B:-104
೮-105
D:-105
Correct Answer:- Option-D
Question25:-Which of the following is not the characteristic of an ideal op-amp?
A:-Infinite input resistance
B:-Infinite output resistance
C:-Infinite voltage gain
D:-Infinite bandwidth
Correct Answer:- Option-B
Question26:-The electrolyte used in dry cell?