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 'Lecturer in Mechanical Engineering ' And exam conducted in the year 2023. And Question paper code was '129/2023'. 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.
95. The wavelength of maximum emissive power is given by:
(A)
(0
Kirchoff’s law (B) Stefan Boltzman law
Wein’s law (D) Fourier law
96. For a perfectly black body :
(A)
(0)
(0
(0)
absorptivity = 1 reflectivity = 1 transmittivity = 1
absorptivity = 1 reflectivity = 0 transmittivity = 0
absorptivity = 0 reflectivity = 1 transmittivity = 0
absorptivity = 0 reflectivity = 0 transmittivity = 1
97. Identify the correct statement :
(A)
(0)
(0
(0)
reciprocating compressors are used to supply large quantities of air at a lower
pressure ratio
centrifugal compressors are used to supply large quantities of air at a lower
pressure ratio
reciprocating compressors are used to supply small quantities of air at a lower
pressure ratio
centrifugal compressors are used to supply small quantities of air at a higher
pressure ratio
98. A two stage compressor takes air at 3.6 bar and discharges at 10 bar. For maximum
efficiency the intermediate pressure is :
(A)
(0
4 081 (B) 5.6 سوط
6 bar ൯൩) 6.8 bar
99. One ton refrigeration is equivalent to :
(A)
(0
3.5 kJ/s رم 3.5kJ/min
3.5 J/s ൯൩) 3.5 J/min
100. During adiabatic cooling of moist air :
(A)
(0)
(0
(0)
129/2028
specific humidity remains constant
relative humidity remains constant
dry bulb temperature remains constant
wet bulb temperature remains constant
18 A