Which is not a refrigerant ?
Which is not a refrigerant ?
A. SO2
B. NH3
C. CCl2F2
D. C2H4Cl2
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Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?
Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?A. Expansion valve
B. Condenser
C. Refrigerator
D. CompressorA closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________________?
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 decreasesClaude’s liquefaction process employs the cooling of gases by__________________?
Claude’s liquefaction process employs the cooling of gases by__________________?A. Expansion in an engine
B. Following a constant pressure cycle
C. Throttling
D. None of theseActivity co-efficient is a measure of the____________________?
Activity co-efficient is a measure of the____________________?A. Departure from ideal solution behaviour
B. Departure of gas phase from ideal gas law
C. Vapour pressure of liquid
D. None of theseDuring Joule-Thomson expansion of gases_________________?
During Joule-Thomson expansion of gases_________________?A. Enthalpy remains constant
B. Entropy remains constant
C. Temperature remains constant
D. None of theseNear their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?
Near their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?A. Less than
B. Same as
C. More than
D. Half