The amount of heat flow through a body by conduction is

  • ADirectly proportional to the surface area of the body
  • BDirectly proportional to the temperature difference on the two faces of the body
  • CDependent upon the material of the body
  • DAll of the above
Correct Answer : (D)

All of the above

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The most commonly used method for the design of duct size is the


Thermal diffusivity is a

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