Kerala PSC Previous Years Question Paper & Answer
Page:13
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Lineman-PWD (Electrical Wing) ' And exam conducted in the year 2021. And Question paper code was '131/2021'. 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.
80.
81.
82.
83.
84.
85.
86.
87.
88.
Horn gap type surge diverter is a
(A) Lightning arrester (B) Voltage regulator
(C) Overload tripping contact (D) Air break circuit breaker
The transistor configuration used for impedance matching is
(A) CE (B) CB
(0೦೦ (ಐ) All of the above
In PN junction diode the depletion region contains
(A) Electrons (B) Holes
(C) Immobile ions (D) None of the above
Peak inverse voltage of centre tapped full wave rectifier is
(A) Vm (B) 2Vm
(©) Vm/2 (D) Vm/V2
When transistor is used as a switch its region of operation is
(A) Active region (B) Cut-off region
(C) Saturation region (0) Both Band ©
The forbidden energy gap for silicon semiconductor is
(A) 1.21 eV (8) 0.72 ev
(C) 0.3 eV (೧) 5 eV
The rectification efficiency of a half wave rectifier is
(A) 81.2% (B) 40.6%
(C) 0.48% (D) 1.21%
Unit of luminous flux is
(A) lux (B) lumen
(C) lumen-hours (0) lumen/m?
The material which can be used for filaments of incandescent lamps must possess
(A) high melting point (B) low vapour pressure
(C) high resistivity (D) All of the above
1312021 = नन्व [8:0 [13]