Page:16
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Lecturer in Electronics and Instrumentation (Polytechnics)' And exam conducted in the year 2023. And Question paper code was '121/2023/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.
D:-WAVE
Correct Answer:- Option-B
Question79:-Which of the following system is a time variant system?
Az-yin)= 210) +2(n-1)
B:-yin)=x(-n)
താന
D:-yin= 22m)
Correct Answer:- Option-B
Question80:-A mechanical rotational system is represented by a differential
equation J,94+5,%5.x,(6,-6,)=7 , where T- torque,, « - angular displacement, J-moment
of inertia, B-dashpot coefficient and K-spring stiffness constant. Find the equivalent
torque-voltage electrical analogous equation for the mechanical rotational system
2; 81-08:
A: 44 + र व ( ig) ನಭ)
നി ضفر
و தவப் படட :8
നി
ഉപ് ~ig)dt=elt)
Correct Answer:- Option-C
Question81:-Consider the following properties of signal flow graph
(1) Signal flow graph is applicable to linear systems
(ii) Signal flow graph of a system is unique
(iii), Signals travel along branches only in the marked direction
Which of the above statements is/are incorrect?
A:-(i) and (ii)
B:-(i) only
C:-(ii) only
D:-(i), (ii) and (iii)
Correct Answer:- Option-C
Question82:-For the construction of Bode plot, the corner frequencies (rad/sec) for
the given transfer function ೮೫೧೫
(4244
A:-0, 2 and 4
B:-2 and 4
C:-0, 0.5 and 0.25
D:-0.5 and 0.25
Correct Answer:- Option-D
are
Question83:-Match the following open loop transfer functions with the type of input
signals which rise to a constant steady state error values. Assume H(s)=1
(द (i) Step
(b) a= 26 (ii) Parabolic
0-2)
(©) जलन ज््न्ञ (iii) Rsmp