The freezing point of R-12 is

Related Questions

1. The formation of frost on cooling coils in a refrigerator
2. A refrigeration system
3. The human body feels comfortable when the heat stored in the body is
4. In mechanical refrigeration system, the refrigerant has the maximum temperature
5. The humidity ratio or specific humidity is the mass of water vapour present in
6. During sensible cooling of air ________ decreases.
7. The evaporator changes the low pressure liquid refrigerant from the expansion valve into
8. The dry bulb temperature lines, on the psychrometric chart are
9. A one tonne refrigerating machine means that
10. If a gas is to be liquefied, its temperature must be
11. The central air conditioning system has ________ overall efficiency as compared to individual systems.
12. The emissivity of a polished silver body is __________ as compared to black body.
13. The lowest thermal diffusivity is of
14. The lowest temperature during the cycle in a vapour compression system occurs after
15. Which of the following statement is correct?
16. Carbon dioxide is
17. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine…
18. In a saturated air-water vapour mixture, the
19. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature…
20. Which of the following is not a desirable property of a refrigerant?
21. The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in…
22. The difference between dry bulb temperature and dew point temperature, is called
23. Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since
24. Formation of frost on evaporator in refrigerator
25. The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by
26. The bypass factor, in case of sensible cooling of air, is given by (where td₁ = Dry bulb temperature…
27. The thermostatic expansion valve is used in __________ type of evaporators.
28. Highest pressure encountered in a refrigeration system should be
29. The specific humidity during dehumidification process
30. In a refrigeration cycle, the flow of refrigerant is controlled by

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