Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'A/C MECHANIC KTDC' And exam conducted in the year 2017. And Question paper code was '132/2017'. 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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How many diodes are there in a bridge rectifier ?
കമ 0) 3
< 4 D) 6
Which is the semi-conductor device with three terminals and used for amplifying electric and
electronic signals ?
^) Diode (B) Transistor
(
(C) Capacitor (D) Zener diode
‘What type of relay is used in RSIR ?
(ಗ) Voltage type relay 0) Hotwire relay
(C) PTCrelay (D) Current coil relay
The vapour pressure of refrigerant should be
(A) lower than atmospheric pressure
(B) higher than atmospheric pressure
(C) equal to atmospheric pressure
(D) none of the above
One of the purposes of sub-cooling the liquid refrigerant is to
(^) reduce compressor over-heating
(B) reduce compressor discharge temperature
(C) increase cooling effect
(D) ensure that only liquid and not the vapour enters the expansion valve
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
(^) decreases (B) increases
(0) remains same (D) depends on other factors
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made up of
(ಹ) Copper (B) Steel
(C) Aluminium (D) Brass
The higher temperature in vapour compression cycle occurs at
(ಹ) Receiver (B) Expansion valve
(C) Condenser discharge (D) Compressor discharge
9 132/2017
[P.T.O.]
