Mechanical Engineering :: Heat and Mass Transfer
- Film coefficient is defined as the ratio of
- The rate of energy transferred by convection to that by conduction is called
- Thermal conductivity of water _________ with rise in temperature.
- Which of the following property of air does not increase with rise in temperature?
- Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of
- Thermal conductivity of glass wool varies from sample to sample because of variation in
- Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by
- According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to
- The critical radius is the insulation radius at which the resistance to heat flow is
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