Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Assistant Engineer (Electrical) - Kerala State Electricity Board Ltd' And exam conducted in the year 2023. And Question paper code was '225/2023'. 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.
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52.
The per unit impedance of a line is X p.u. if the base voltage is increased 3 times and the base
MVA is doubled, the new per unit impedance is:
(a) 2x 0) 2x
© =x () 9x
For a fully transposed transmission line:
(A) Positive, negative and zero sequence impedances are equal
(B) Positive and negative sequence impedances are equal
(C) Zero and Positive sequence impedances are equal
(D) Negative and zero sequence impedances are equal
In G-S method of power flow problem, the number of iterations:
(A) Depends on tolerance (B) Depends on voltage control buses
(C) Depends on number of buses (D) Remains fixed
Consider a system described by characteristic equation 554802, 58-௦2 50,
where ¢,@, denotes damping ratio and undamped natural frequency of the system. Choose
the correct answer from matching of the pairs:
(a) ¢=0 0) Underdamped system
(b) 0<८<1 (ii) Undamped system
८ ¢>1 (iii) Critically damped system
५) 2௩0 (iv) Overdamped system
€ 4-1 (೪) Negatively damped system
(A) (0-00, (0-0), (96-09), (6-0, 6-0ம
(B) ൭-൬, ൯-൭, ൭-൭, (൭.൦, ©)-Gi)
(© (80-09), ()-டு), (9-6), (6-0), (०-(॥)
ட) (ூ-டு,௫)-0), 6-0), (6-0), ൭-൩)
¥(s) 6.
(0866-1000 transfer function of a unity-feedback system is given by —— =———*—___
26) 52 + كروي + @?
Steady-state error for unit-ramp input is:
25% م = +(
4
6 4
© 1 0 द
225/2023 10 A