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
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 - High _____________ is an undesirable property for a good refrigerant?
A. Specific heat
B. Latent heat of vaporisation
C. Viscosity
D. Specific vapor volume - Which of the following is not a common refrigerant ?
A. Freon-12
B. Ethylene
C. Ammonia
D. Carbon dioxide - 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 - 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 is not a refrigerant ?
A. SO2
B. NH3
C. CCl2F2
D. C2H4Cl2 - Which of the following is an extensive property of a system ?
A. Heat capacity
B. Molal heat capacity
C. Pressure
D. Concentration - Which of the following is not affected by temperature changes ?
A. Fugacity
B. Activity co-efficient
C. Free energy
D. None of these - Which of the following identities can be most easily used to verify steam table data for superheated steam ?
A. (∂T/∂V)S = (∂p/∂S)V
B. (∂T/∂P)S = (∂V/∂S)P
C. (∂P/∂T)V = (∂S/∂V)T
D. (∂V/∂T)P = -(∂S/∂P)T - Which of the following will increase the volume of a real gas by four times ?
A. Doubling the absolute temperature as well as pressure of the gas
B. Reducing pressure to one fourth at constant temperature
C. Reducing temperature to one fourth at constant pressure
D. Reducing the temperature to half and doubling the pressure
