mechanical-engineering-heat-transfer-refrigeration-and-air-conditioning Related Question Answers
27. While designing the refrigeration system of an aircraft, the prime consideration is that the
28. The heat transfer takes place according to
29. An electrolux refrigerator is called a __________ absorption system.
31. Thermal conductivity of water __________ with rise in temperature.
32. During adiabatic saturation process on unsaturated air __________ remains constant.
33. The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
34. A perfect black body is one which
35. Degree of saturation or percentage humidity is
36. The coefficient of performance of Heat Pump is always __________ one.
37. During a refrigeration cycle, heat is rejected by the refrigerant in a
38. A refrigeration system
39. The subcooling in a refrigeration cycle
40. Which of the following is a non-ferrous metal?
41. During sensible cooling of air __________ decreases.
42. The critical radius is the insulation radius at which the resistance to heat flow is
43. In case of solids, the heat transfer takes place according to radiation.
44. A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.
46. The temperature of ammonia after compression in a vapour compression system is
47. The centrifugal compressors are generally used for refrigerants that require
48. The water, alcohol and ammonia have same refrigerating effect at different altitudes.
49. The automobile radiator is a heat exchanger of
50. In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
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