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: 7 out of 11
Excerpt of Question Code: 003/2020/OL

B:-Only by the negative half cycle of the supply
C:-By positive & negative cycle of the supply
D:-None of the above
Correct Answer:- Option-C
Question59:-The procedure used for controlling the speed of a 3 phase induction motor is
A:-Fixed voltage -variable frequency method
B:-variable voltage -fixed frequency method
C:-variable voltage -variable frequency method
D:-Fixed voltage -fixed frequency method
Correct Answer:- Option-C
Question60:-The purpose of the synchronizing control in a CRO is to
A:-Focus the spot on screen
B:-Adjust the amplitude of the display
C:-Control the intensity of spot
D:-Lock the display of the signal
Correct Answer:- Option-D
Question61:-Which is the necessary condition for generating sinusoidal voltage in a feedback type oscillator
A:-Total loop gain should be one
B:-Total phase shift should be 360° or 0°
C:-Either A or B
D:-Both A and B
Correct Answer:- Option-D
Question62:-The largest number that can be represented by 'n' bits is

(:- 27 (1-1)
0: 2551)”
Correct Answer:- Option-A
Question63:-The binary equivalent of the Hexadecimal number *(18)_(16) is*
Correct Answer:- Option-D
Question64:-The output of a logic gate is "1" when all its inputs are at logic "0", the gate is
A:-A NOR or an EX-OR gate
B:-A NAND or OR gate
C:-An AND or an EX-NOR gate
D:-None of above
Correct Answer:- Option-D
Question65:-If a mod 9 counter is constructed using 4 flip flops the counter will skip
A:-7 Counts
B:-8 Counts
C:-9 Counts
D:-none of the above
Correct Answer:- Option-A
Question66:-The two input OR gate is
Correct Answer:- Option-C
Question67:-Which of the following statement about RAM is not correct
A:-It stands for Random Access Memory
B:-It is R/W memory
C:-It is volatile memory
D:-The data's are entered or stored in the chip during manufacturing
Correct Answer:- Option-D
Question68:-The PIV of diode in a half wave rectifier circuit with shunt capacitor filter is

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Junior Instructor-Lift and Escalator Mechanic : Video