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Heat flux is the time rate of heat transfer per

Q.  
Heat flux is the time rate of heat transfer per


Answer & Explanation

Heat flux is the time rate of heat transfer per unit area.

Thus correct option is: B.

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More Questions Heat and Mass Transfer:

Q.  
In forced convection, the heat transfer depends on

A. Re, Pr

B. Re, Gr

C. mainly Gr

D. Re only


Answer & Explanation

Q.  
Prandtl number is the ratio of

A. momentum diffusivity to mass diffusivity

B. momentum diffusivity to thermal diffusivity

C. thermal diffusivity to mass diffusivity

D. thermal diffusivity to momentum diffusivity


Answer & Explanation

Q.  
Heat transfer by natural convection is enhanced in system with

A. high viscosity

B. high co-efficient of thermal expansion

C. low temperature gradients

D. low density change with temperature


Answer & Explanation

Q.  
At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe ?

A. 0.5

B. <0.5

C. >0.6

D. <0.1


Answer & Explanation
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