## Kerala PSC Previous Years Question Paper & Answer

Title : VOCATIONAL TEACHER MAINTENANCE AND REPAIRS OF DOMESTIC APPLIANCES VHSE
Question Code : A

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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'VOCATIONAL TEACHER MAINTENANCE AND REPAIRS OF DOMESTIC APPLIANCES VHSE' And exam conducted in the year 2015. And Question paper code was '225/2015'. 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.

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Excerpt of Question Code: 225/2015

225/2015

Maximum : 100 marks

Time : 1 hour and 15 minutes

1. Compute the kVA load for maximum efficiency of a 5500/220V, 50 kVA, 50 Hz transformer
with full load Cu loss 1.2 kW and a core 1088 of 1 KW :

(A) 45.647۸ ൫ 86.33 kVA
ര 2 D) 43.35 kVA

2, 10 ೩ transformer on ‏یت‎ the input voltage :
(ಗೆ) 16517 08850 with the magnetizing current
(B) leads the magnetizing current by 90°
(C) lags the magnetizing current by 45°
(D) lags the magnetizing current by 90°

3. If the source voltage and frequency are doubled for a = the eddy current loss in
the core will become :

(A) र्णा (B) remains the same
(C) doubles (D) 4times

4. Inalevel compounded generator, the terminal voltage at half full load is :
(2) same as full load voltage (B) greater than no load voltage
(C) same as no load voltage (12) less than no load voltage

5. A 4 pole generator with 16 coils has a 2 layer lap winding. The pole pitch is :
(4) 2 ® 16
(0 8 യ 4

6. 'The back emf generated by a 220V de machine with armature resistance 0.5 ohm when
driven as a motor 210V, What is the generated emf if the machine is driven as a generator?

(കര 230V (B) 220V
‏رف‎ ഒ ‏نی‎ ய) 7

ध्र. For a de shunt motor by flux control, we get speeds :
(A) above normal speed only (18) வண normal speed only
(C) above and below normal speed only (1)) none of the above

A 3
‏رمم‎