Resistance to heat flow by conduction is proportional to (where, t & ρ are thickness & density of the material respectively and A = area normal to the direction of heat flow.) ?

Related Mcqs:

For what value of Prandtl number, St = f/2 ?

A. 1.5 B. 1 C. > 1 D. < 1...

Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because___________________?

A. Convection becomes important B. Conduction becomes important C. Radiation becomes important D. Sub-cooled boiling occurs...

When warm and cold liquids are mixed, the heat transfer is mainly by_______________?

A. Conduction B. Convection C. Radiation D. Both A. & C....

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A. Thermal conductivity B. Thickness C. Temperature difference D. Heat transfer area...

Which of the following has the lowest Prandtl number ?

A. Molten sodium (a coolant used in fast breeder reactor) B. Water C. Transformer oil D. Dilute H2SO4...