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 'Engineering Assistant ( Electronics)/Overseer Gr-I (Electronics) - PWD (Electronics Wing) ' And exam conducted in the year 2021. And Question paper code was '137/2021'. 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 speakers which cover the frequencies from 16Hz to 1000Hz are called
(A) Squawkers (B) Tweeters
(C) Baffle (D) Woofers
The ratio of the current or voltage entering the network to the current or voltage
leaving the network is known as
(A) Characteristic Impedance (B) Propagation Constant
(C) Iterative Impedance (D) Image Impedance
Anumber of identical parallel antennas arranged along a line perpendicular to the line
of array axis and each element fed with current of equal magnitude and same phase
is known as
(A) Broad side array (B) Log periodic array
(C) End fire array (D) Collinear array
RF amplifier in a super heterodyne receiver is used to
(A) increase tracking
(B) increase adjacent-channel rejection
(C) increase the tuning range
(D) increase rejection of the image frequency
In TV circuits the equalizing pulses are sent during
(A) horizontal blanking (B) horizontal retrace
(C) vertical retrace (D) vertical blanking
Frequencies in the UHF range are normally propagated by
(A) space waves (B) sky waves
(C) surface waves (D) ground waves
An example for multiband HF receiving antenna is
(A) conical horn (B) folded dipole
(C) rhombic loop (D) log periodic
A PIN diode is
(A) a semiconductor point-contact diode
(B) used as a microwave switch
(C) often used as a microwave detector
(D) a microwave mixer diode
53772021