Related Questions

Which of the following is not a common refrigerant?
A Freon-12
B Ethylene
C Ammonia
D Carbon dioxide
Which of the following is not a desirable property of a refrigerant?
A High risibility with oil
B Low boiling point
C Good electrical conductor
D Large latent heat
which of the following refrigerant has the lowest freezing point?
A Freon -11
B Freon -12
C Freon -22
D Ammonia
Which of the following cycles uses air as the refrigerant?
A Ericson
B Stirling
C Carnot
D Bell Coleman
Which of the following statement is correct for ammonia as a refrigerant?
A It is toxic to mucous membranes.
B It requires large displacement per TR compared to fluoro carbons.
C It reacts with copper and its alloys.
D All of these
Which of the following is an undesirable characteristics 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 refrigerant is highly toxic and flammable?
A Ammonia
B Carbon dioxide
C Sulphur dioxide
D R-12
Which of the following refrigerant has the highest freezing point.
A Ammonia
B Carbon dioxide
C Sulphur dioxide
D R-12
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?
A Ammonia
B Carbon dioxide
C Sulphur dioxide
D Fluorine
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

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