Kerala PSC Previous Years Question Paper & Answer
Page:7
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'TRADESMAN ELECTRICAL TECHNICAL EDUCATION/ELECTRICIAN GROUND WATER /ELECTRICIAN GR II PRINTING GOVT PRESSES ELECTRICIAN AGRICULTURE /ELECTRICIAN GR II THE KERALA CERAMICS LTD' And exam conducted in the year 2015. And Question paper code was '112/2015'. 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.
50.
51.
52.
53.
൫4.
55.
56.
57.
Three single phase transformers, each with 10 KVA rating connected in delta. If one of the
transformer is damaged and taken out, the output of the system will be :
ல்
(0
20 KVA (B) - 17.4 KVA
8.66 KVA (D) 10KVA
Transformer oil is used to :
(ಗಿ)
(0)
6001 (B) lubricate
lubricate and cool (D) insulate and cool
Which നാദ വ് the following transformer is largest in size?
ക)
©
2 KVA, 600 Hz (B) 2KVA, 400 Hz
2 KVA, 200 Hz (D) 2KVA, 50 Hz
Power transformers are designed to have maximum efficiency at :
@)
(0)
near full load (B) noload
half load (D) more than full load
A transformer has maximum efficiency at an iron loss of 400 watts. Its copper loss will be :
(@A)
(0)
200 W ൫ 300 W
100 W (D) 800 W
When a 440/220 V transformer is connected to a 440 V DC supply :
@A)
ര)
(©
യ
the output will be zero volt
the output will be 220 V
the transformer may burn
the output will be less than 220 V.
In a transformer, the primary and secondary induced voltages are :
(5)
ര
(0)
യ)
(ಗಿ)
(0)
90° out of phase
in phase
180° out of phase
in any phase difference
is the most suitable material for the core of a transformer.
Cold rolled grain oriented steel (B) Hot rolled grain oriented steel
Cast steel (D) Carbon steel
9 ⊽ 112/2015
மா)
