Kerala PSC Previous Years Question Paper & Answer

Title : Junior Instructor-Lift and Escalator Mechanic
Question Code :


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' 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 ''. 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: 6 out of 11
Excerpt of Question Code: 003/2020/OL

C:-Cleaning the file teeth
D:-Cleaning the chips
Correct Answer:- Option-C
Question49:-Mechanical device attached to the car frame or counter weight to stop and hold in the event of free fall
A:-Retiring cam
B:-Safety gear
C:-Over head pulley
Correct Answer:- Option-B
Question50:-Which device is used to mount the pulley on shaft?
Correct Answer:- Option-A
Question51:-In terms of energy bands, semiconductors can be defined as those material which at room temperature have
A:-Partially filled conduction band
B:-Partially filled valance band
C:-A very narrow energy gap
D:-All of the above
Correct Answer:- Option-D
Question52:-In an N type semiconductor there are
A:-No minority carriers
-Immobile negative ions
C:-Immobile positive ions
D:-holes as majority carriers
Correct Answer:- Option-C
Question53:-A square wave oscillator is
A:-Bistable multivibrator
-An Astable multivibrator
C:-A Monostable multivibarator
D:-None of the above
Correct Answer:- Option-B
Question54:-In a transistor the reverse saturation current ICo
A:-Doubles for every 10°C rise in temperature
-Doubles for every 1°C rise in temperature
C:-Increase linearly with temperature
D:-Doubles for every 15°C rise in temperature
Correct Answer:- Option-A
Question55:-An SCR can be turned OFF by
A:-Removing the gate voltage
B:-Reducing the Anode to Cathode voltage
C:-Reducing the Anode current below the holding current
D:-All of the above
Correct Answer:- Option-C
Question56:-DIAC is a
A:-One terminal device
B:-Two terminal device
C:-Three terminal device
D:-Four terminal device
Correct Answer:- Option-B
Question57:-Which one of the following is not a characteristics of the UJT
A:-Negative resistance
-Intrinsic stand off ratio
C:-Gate current
D:-Peak point voltage
Correct Answer:- Option-C
Question58:-A TRIAC can be triggered
A:-Only by the positive half cycle of the supply

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Junior Instructor-Lift and Escalator Mechanic : Video