A. Air compressor
B. Liquid cooling system of an automobile
C. Boiler
D. None of these
Related Mcqs:
- On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will____________________?
A. Increase
B. Decrease
C. Remain same
D. Increase in summer and will decrease in winter - A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________________?
A. its internal energy (U) decreases and its entropy (S) increases
B. U and S both decreases
C. U decreases but S is constant
D. U is constant but S decreases - The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?
A. Doubled
B. Halved
C. Trebled
D. Unpredictable - The specific heat of saturated water vapour at 100°C is__________________?
A. ∞
B. -ve
C. 0
D. +ve - Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?
A. Freon
B. Liquid sulphur dioxide
C. Methyl chloride
D. Ammonia - The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are________________?
A. 5 & 3
B. 3.987 & 1.987
C. 1.987 & 0.66
D. 0.66 & 1.987 - Joule-Thomson Co-efficient at any point on the inversion curve is___________________?
A. ∞
B. +ve
C. 0
D. -ve - In an irreversible process________________?
A. Tds = dE – dW = 0
B. dE – dW – Tds = 0
C. Tds – dE + dW < 0
D. Tds – dT + dW < 0 - ________________ decreases during adiabatic throttling of a perfect gas?
A. Entropy
B. Temperature
C. Enthalpy
D. Pressure - What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor ?
A. 2
B. 0
C. 3
D. 1
