Kerala PSC Previous Years Question Paper & Answer

Title : Electrician - Agriculture Development and Farmer's Welfare, Ground Water & Water Transport
Question Code : A

Page:14


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Electrician - Agriculture Development and Farmer's Welfare, Ground Water & Water Transport ' And exam conducted in the year 2022. And Question paper code was '050/2022'. 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.

page: 14 out of 16
Excerpt of Question Code: 050/2022

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The no load current of a transformer in terms of the full load current is usually
(A) 1 to 3% (B) 5 to 9%
(C) 9 to 12% (D) 12 to 20%

The purpose of oil in the transformer is to
(A) Lubricate (B) Insulate and cool
(C) Lubricate and cool (D) Cool

Buchholz relay is a protective device used in
(A) 3 phase motor (B) Single phase motor
(C) Auto transformer (D) Power transformer

Dynamometer type wattmeter can be used on
(A) Both AC and DC (B) DC only
(C) AC only (D) None of these

The specification of ceiling fan is
(A) Current (B) Voltage
(C) Sweep (D) Power

The gas filled in a sodium vapour lamp is
(A) Neon (B) Helium
(C) Argon (D) Hydrogen

Which element is used as a semiconductor material?
(A) Copper (B) Plastic
(C) Brass (D) Silicon

The main characteristic of any diode is

(A) it lets current flow in only one direction

(B) most current flow when it is reverse biased
(C) it lets current flow from cathode to anode
(D) no current flow when it is forward biased

NPN transistors are preferred to PNP transistor for
(A) easy use in +۷۶ supply rail

(B) higher switching speed

(C) a wide range of operating temperature

(D) the reasons mentioned in (A) and (B) above

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