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 'Workshop Instructor/ Instructor Gr. II/ Demonstrator in Electronics Engineering' And exam conducted in the year 2023. And Question paper code was '068/2023'. 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 probability density function of thermal noise is
A) Poisson B) Gaussian
C) Binomial D) Bessel
UHF range frequencies normally propagates by means of
A) space waves B) sky waves
C) normal waves D) ground waves
For tracking of satellites at very high frequency helical antennas are used due to
A) lonosphere refraction
B) Tropospheric reflection
C) Internal reflection
D) Faraday’s effect
QPSK is a modulation scheme where each symbol consists of
A) 4 bits
B) 2 bits
C) 1 bit
D) M number of bits, depending upon the requirement
The method used for demodulating FM wave is
A) Envelop detector
B) Multivibrator
C) Amplitude discrimination
D) Phase discrimination
In a linear broadside antenna array with half wave length spacing the directivity is equal to
A) Unity
B) Zero
C) Half of the number of elements present in array
D) Number of elements present in array
Which one of the following is the mode of propagation used in HF antennas ?
A) lonospheric B) Ground wave
C) Tropospheric D) Free space
PAM signal is detected using
A) Low pass filter B) High pass filter
C) Band pass filter D) Resistor
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