Which among the following is undesirable property of a good refrigerant?
Which of the following is not true in respect of an ideal refrigerant?
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Match List-I (Characteristics) with
List- ll
(Refrigerant) the following:
List-I
A. Lowest boiling point
B. Highly toxic and flammable
C. Highest freezing point
D. Highest critical
List-ll
1. R-502
2. Carbon dioxide
3. Ammonia
4. R-22 pressure
CODE
R-12 is generally preferred over R-22 in deep freezers since
Environmental protection agencies advice against the use of chlorofluoro-carbon refrigerants because
The selection of refrigerant for a vapour compression system depends on
1. Toxicity
2. Environmental effect
3. Saturation pressure-temperature relationship
Q. Which of these statements are correct?
Match the List-I (Refrigerants) with List-II (Application) following
:
When there is leakage of ammonia refrigerant, the sulphur stick gives
Which of the following leak-detection method is extensively used in the manufacture and assembly of refrigerant equipment?
The leaks in a refrigeration system using Freon are detected by