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 ' Junior Instructor(Technician Power Electronics System-TPES)' And exam conducted in the year 2023. And Question paper code was '125/2023'. 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.
125/23
69.
70.
71.
72.
73.
74.
75.
76.
A three phase full wave fully controlled bridge uses
A) 4SCRs B) 8SCRs C) 3SCRs D) 6SCRs
A diac-triac built in the same chip is called
A) thyratron B) quadrac
C) thermistor D) ignitron
A freewheeling diode is used in a controlled rectifier circuit in case of
A) resistive loads B) capacitive loads
C) inductive loads D) all types of loads
From the following list, a DC chopper circuit control can be adopted by
i. keeping TON constant and varying TOFF
ii. keeping TOFF constant and varying TON
iii. varying [TON/TOFF] ratio
A) iand ii B) ii and iii
C) iand iii D) i, ii and iii
The heart of an inverter is the
A) oscillator circuit B) rectifier circuit
C) step up transformer D) filter
Thermistor is a transducer which converts
A) heat into light
B) light into heat
C) temperature into equivalent electrical signal
)
D) electrical signal into equivalent temperature
Which one of the following is a measure of purity of the power output of power supply ?
A) Rectification B) Ripple factor
C) Regulation D) Knee voltage
What will be the backup time of a UPS if it is backed by 150AH, 12V battery driving
a load of 150W ?
A) 12 hours B) 14 hours C) 16 hours D) 10 hours
-12-