The transfer of heat by molecular collision is known as

More Questions from Heat Transfer, Refrigeration and Air Conditioning

• A cube at high temperature is immersed in a constant temperature bath. It loses heat from its top, bottom and side surfaces with heat transfer coefficients of h1, h2 and h3 respectively. The average heat transfer coefficient for the cube is
• During sensible cooling of air, the relative humidity increases.
• Wein's law states that the wave length corresponding to __________ is proportional to the absolute temperature.
• The coefficient of performance of vapour compression refrigeration system is quite __________ as compared to air refrigeration system.
• In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = By-pass factor)
• The wet bulb temperature at 100% relative humidity is __________ dry bulb temperature.
• Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat)
• The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
• In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
• Which of the following refrigerant is highly toxic and flammable?

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