Kerala PSC Previous Years Question Paper & Answer
Page:12
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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A cooling tower’s warm water inlet temperature is 44 °C, sump water outlet temperature is 32 °C,
surrounding air wet bulb temperature is 24 °C. Find out the efficiency of the cooling tower in
percentage.
(4) 60% (೫) 40%
(೧) 80% യ 75%
The cut-in and cut-out set pressure difference is called
(A) set pressure (B) differential pressure
(C) cut-out pressure (D) cut-in pressure
Compressor motor protected by the .
(^) low pressure switch (B) overload protector
(C) high pressure switch (D) temperature control
The purified, conditioned air improves the .
(^) Breathing of human (B) Cleaning of AC room
(0 Performance of the system (D) Quality of the air filters
Which instrument is used to measure relative humidity ?
(^) Hydrometer (B) Psychrometer
(C) Hygrometer (D) Thermometer
What is the purity of dry nitrogen for flushing ?
(A) 10 ppm (B) 15ppm
(9 3ppm (D) 8ppm
By using which valve in the charging line, the refrigerant can be recovered ?
(^) Service valve (B) Hand shut off valve
(C) Piercing valve (D) Double stage regulator
The relationship between rotor speed ‘N’, frequency ‘€ and number of poles ‘p’ is given by
relation
(A) N=12010p (छ) PN=120p
ര 7ءء (0) N=120p/f
A oil separator is necessary in discharge line to retum the oil to the compressor in case of
(A) R-290 (೫) 7
(© ೩12 (D) 8-600
132/2017 12
