Page:6
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'DRAFTSMAN POLICE TELECOMMUNICAION UNIT' And exam conducted in the year 2015. And Question paper code was '104/2015'. 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.
44.
45,
46,
47.
48.
49.
=
51.
The efficiency of a transformer will be maximum when :
(8) Iron losses are equal to copper losses
(B) Iron losses are more than copper losses
(C) 70 losses are less than copper losses
(D) None of the above
Commonly used a.c. Motor in industrial area :
(ക) Slipring induction motor (B) Squirrel cage induction motor
(0) Synchronous motor (D) Universal motor
The advantage of transistor over vacuum tube is :
(A) Transistor operates at lower voltage
(B) Transistor is very small in size
(C) Less losses in the transistor
(D) .All the above
If three resistances of Ri, Rz and Rs are connected in series the total resistance is :
മ Ri+Ra+Rs (೫) RixRz2xRs
(€) 1 + 1/४ + 1/3 D) 1/4 > 1/82 > நடி
The conversion of energy which takes place in thermal power plant :
(4) Solar energy to electrical energy (B) Hydro energy to electrical energy
(€) Heat energy to electrical energy (D) Light energy to electrical energy
‘Which motor 18 used in domestic mixy’s ?
(^) Shaded pole motor ൫) Universal motor
(C) Slipring motor (D) Capacitor start motor
The unit of impedance is in :
ல عسطہ (B) Henry
(ര Siemens (D) dJoule
In a star connection the ratio of the line voltage and phase voltage :
(ಯ) 1.414 © 1.782
© 3 त) 2
104/2015 ' 8