Kerala PSC Previous Years Question Paper & Answer

Title : Instrument Mechanic
Question Code :

Page:7


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Instrument Mechanic' And exam conducted in the year 2023. And Question paper code was '158/2023/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 19
Excerpt of Question Code: 158/2023/OL

Il. Emitter is always forward biased w.r.t Base so that it can supply large number of
majority carriers.

Ill. Collector is smaller than other two regions

IV. Transistor transfers input signal current from a low-resistance circuit to high-
resistance circuit.

A:-All are True
B:-l, Il and IV are true
C:-l, Il and Ill are true
D:-Only | and II are true
Correct Answer:- Option-B
Question33:-Select the false statement for a basic Zener voltage regulator:
A:-Zener is equivalent to a battery when it is in breakdown region
B:-Output voltage remains constant at Vz

C:-Irrespective of the changes in input voltage, current through Zener remains
same

D:-Excess voltage is dropped across the series Resistance
Correct Answer:- Option-C

Question34:-In an oscillator tank circuit, frequency of oscillation is:
A:-inversely proportional to L and directly proportional to C
B:-inversely proportional to L and C
C:-directly proportional to L and C
D:-inversely proportional to C and directly proportional to L
Correct Answer:- Option-B

Question35:-For an RC phase shift oscillator circuit having three RC network
sections, each section produces a phase shift of :

A:-60°

B:-120°

C:-90°

D:-180°

Correct Answer:- Option-A

Question36:-2's complement of binary "1000" is

A:-0111

B:-1000

C:-0110

D:-0101

Correct Answer:- Option-B

Question37:-According to De Morgan's theorem.
1. NAND gate is equivalent to Bubbled OR gate
Il. NOR gate is equivalent to Bubbled AND gate.

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