Kerala PSC Previous Years Question Paper & Answer
Page:12
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Workshop Instructor/ Demonstrator/ Instructor Grade II in Electronics and Communication' And exam conducted in the year 2023. And Question paper code was '058/2023'. 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.
058/23
71.
72.
73.
74.
75.
76.
Which one of the following blocks is not common in both AM and FM receivers ?
A) RF amplifier B) Mixer
C) Slope detector D) IF amplifier
Which one of the following statement is correct ?
Noise has the greatest effect in a communication system when it interferes with the
signal
A) In the transmitter B) In the channel
C) In the receiver D) In the transducer
An AM superheterodyne receiver with IF of 455 kHz is tuned to the carrier frequency
of 1000 kHz. The image frequency is
A) 545 kHz B) 2000 kHz
C) 1455 kHz D) 1910 kHz
Which of the following are the advantages of FM broadcasting over AM broadcasting ?
1. Better S/N ratio.
2. Not subject to signal fading.
3. Power efficiency is superior.
4. Demodulation is simpler.
Select the correct answer from the code given below :
A) 1 810 2 B) 1,2 and4
C) 2,3 and4 D) 1 and3
High level modulation refers to the modulation process in which
A) Modulation is done at high power of carrier and modulating signal
B) Collector modulation method is high level modulation
C) Power amplifiers are used to boost the carrier and modulating signals before
modulation
D) All of the above
FM receivers using the standard 88 to 108 MHz band use IF of
A) 8 MHz B) 9.9 MHz
C) 10.7 MHz D) 12.2 MHz
-12-