A. Specific heat
B. Latent heat of vaporisation
C. Viscosity
D. Specific vapor volume
Related Mcqs:
- Pick out the undesirable property for a good refrigerant ?
A. High thermal conductivity
B. Low freezing point
C. Large latent heat of vaporisation
D. High viscosity - Which of the following is an undesirable characteristic of a refrigerant ?
A. It should be non-explosive
B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
C. Its vapor pressure at the condenser temperature should be very high
D. None of these - Which of the following is not a common refrigerant ?
A. Freon-12
B. Ethylene
C. Ammonia
D. Carbon dioxide - An ideal liquid refrigerant should______________________?
A. Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils
B. Not have unduly high vapour pressure at the condenser temperature
C. Both A. and B
D. Have low specific heat - 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 - Which is not a refrigerant ?
A. SO2
B. NH3
C. CCl2F2
D. C2H4Cl2 - Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?
A. Fading of dyes on textiles
B. Corrosion, tarnishing & soiling of metals
C. Reduced strength of textiles
D. All A., B. and C. - Henry’s law is closely obeyed by a gas, when its _____________ is extremely high?
A. Pressure
B. Solubility
C. Temperature
D. None of these - A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?
A. Hydrogen
B. Carbon dioxide
C. Ozone
D. None of these - Which law of the thermodynamics provides basis for measuring the thermodynamic property ?
A. First law
B. Zeroth law
C. Third law
D. Second law
