11. The value of Prandtl number for air is about
12. A steam pipe is to be insulated by two insulating materials put over each other. For best results
13. Total heat is the heat required to
14. Sensible heat is the heat required to
15. When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by
16. When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by
17. The concept of overall coefficient of heat transfer is used in case of heat transfer by
18. When heat is transferred by molecular collision, it is referred to as heat transfer by
19. Stefan Boltzmann law is applicable for heat transfer by
20. A non-dimensional number generally associated with natural convection heat transfer is
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