## Kerala PSC Previous Years Question Paper & Answer

Title : Junior Instructor Lift and Escalator Mechanic Industrial Training Department
Question Code : A

Page:8

Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Junior Instructor Lift and Escalator Mechanic Industrial Training Department' And exam conducted in the year 2020. And Question paper code was '003/2020/OL'. 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.

page: 8 out of 11
Excerpt of Question Code: 003/2020/OL

-يم
‎B:-Vm‏
‏62
‎D:-3Vm‏
‎Question69:-The number of comparators required in a 3 bit comparator type ADC is‏
ديم
‎B:-7‏
‏6:3
‏0-8
‎Question70:-The rotor of a stepper motor has no‏
‎A:-Windings‏
‎B:-Commutator‏
‎C:-Brushes‏
‎D:-All of these‏
‎Question71:-Which method of speed control cannot be used in 8 permanent magnet dc motor‏
‎A:-Ammature voltage variation‏
‎B:-Armature resistance control‏
‎C:-Varying the field current‏
‎D:-All of the above‏
‎conditions.‏
‎A:-open circuit test‏
‎B:-short circuit test‏
‎C:-Hopkinsons test‏
‎D:-back to back test‏
‎Question73:-In a transformer the resistance between primary and secondary must be‏
‎A:-zero‏

D:-infinite
Question74:-V curves for a synchronous motor represent relation between
A:field current and speed
B:-field current and power factor
C:-Armature current & field பாகர்‌
D:-Power factor and speed
Question75:-An induction motor is expected to take largest starting current under which method of starting
A:-Direct online starting
B:-Starter-rotor starting
C:-star-delta starting
D:-Auto-transformer starting
Question76:-The starting capacitor of a single phase motor is
A:-Electrolytic capacitor
B:-Ceramic capacitor
C:-Paper capacitor
D:-none of these