Kerala PSC Previous Years Question Paper & Answer

Title : ASST ENGINEER MECHANICAL TTP LTD / ASST ENGINEER MECHANICAL SFC OF KERALA LTD
Question Code : A

Page:4


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'ASST ENGINEER MECHANICAL TTP LTD / ASST ENGINEER MECHANICAL SFC OF KERALA LTD' And exam conducted in the year 2015. And Question paper code was '147/2015'. 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.

page: 4 out of 12
Excerpt of Question Code: 147/2015

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൭4. Work input to the air compressor with n as index of compression :
() inercases with ingrease in value of n
(B) decrease with increase in value of n
(C) remains same whatever the value of n

(D) first increases and then decreases with value 071

25. 1 tonne of refrigeration is equiv_alent to:

(ക) 336 kd/min (2) 210 kd/min

(C) 1400 kJ/min (D) 540 kd/min
26. The thermal conductivity is expressed as :

(५) W/mK ⋅ ≺⇃∃≻∇∇∣⋯∅↕⊰

(C) W/hmK D) W/hm?2K

97. In SI engines which one of the following is the correct order of the fuels with increasing
detonation tendency :

(മ) Paraffins, Olefins, Naphthenes, Aromatics
(B) Aromatics, Naphthenes, Paraffins, Olefins
(0) ॐ Olefins, Aromaties, Paraffins
(D) Aromatics, Napthenes, Olefins, Paraffins

28. The Nusselt number in natural convection is a function of Prandtl number and :
(ಹ) Stanton number (B) Biot number
(C) Reynolds number (D) Grashoff number

29. Which of the following properties of a refrigerant is undesirable?
(A) high critical temperature (B) low specific heat of liquid
(C) - low specific volume vapour (D) high boiling point

30. The emissivity of a body is equal to absorptivity when the body remains in thermal
equilibrium. This law refers to as :

(ಗಿ) Planck’s law (B) Lambert’s law
(C) Kirchoff's law (D) Wien’'s displacement law

81. [ட a vapour compression cycle the condition of refrigerant is saturated liquid :
(A) before entering the compressor
(B) before passing through the condenser
(C) after passing through the condenser
(D) after passing through the expansion valve

. 147/2015 6 A

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