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Answer All Questions (Total marks: 10)

Q1. Convection heat transfer coefficient does not depend on geometric parameters of the

system (True/False)

Q2. Forced convective heat transfer coefficient depends on type of flow (True/False)

Q3. Increase in thermal conductivity increases the Nusselt Number (True/False)

Q4. If the Nusselt number (Nu) is unity, the heat transfer is purely by convection (True/False)

Q5. The thickness of the thermal boundary layer increases in the direction of flow (True/False)

Q6. Increase in film thickness.

.........convective heat transfer coefficient.

Q7. The relative thickness of hydrodynamic and thermal boundary is better described

dimensionless number.

Q8. In forced convection, the heat transfer coefficient strongly depends

on....................dimensionless number.

Q9. Fin increase the heat transfer rates by increasing

Q10. Thermal conductivity of the fin should be