In the temperature of air above a pond is 8?C thermal conductivity of ice is 0.005 C.G.S. units, latent heat of fusion of ice is 79.9 cal/gram the density of ice is 1 gm/cu.m, the time taken for the formation of ice layer of 1 cm thickness is

Heat Transfer Mcqs
BILAL KHATTAK0

A.200 seconds
B.100 seconds
C.12.5 seconds
D.10 seconds
E.None of the above

Related Mcqs:

  1. If thermal conductivity of aluminium is say 100 units at 0?C, the thermal conductivity at 500?C will be closer to
  2. The ratio of heat flow QA/QB from two walls of same thickness having thermal conductivity kA = 2 kB, for the same temperature difference will be
  3. The rate of heat flow from a 50 mm thick wall of material having thermal conductivity of 40 W/m?C for a temperature difference of 10?C will be
  4. The unit of thermal conductivity in S.I. units is
  5. There metal walls of same cross-sectional area having thermal conductivity in the ratio 1 : 2 : 4 transfer heat at the rate of 15000 kcal/hr. For same thickness of wall, the temperature deop will be in the ratio
  6. The rate of heat loss through a furnace wall is 1000 kcal per hour when inside temperature is 1000?C and outside wall temperature is 500?C. What should be the wall thickness in case the thermal conductivity of wall material is 0.5 kcal/m-hr?C
  7. Thermal conductivity of air at room temperature is approximately
  8. Thermal conductivity of air at room temperature in kcal/m-hr-?C is nearly
  9. The value of thermal conductivity of water at room temperature is expected to be
  10. In which case the value of thermal conductivity drops with rising temperature

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