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Viscosity of gases _______ with increase in temperature.

Q.  
Viscosity of gases _______ with increase in temperature.


Answer & Explanation

Viscosity is proportional to the square root of the absolute temperature. Thus it increases slowly with temperature.

Thus correct option is: B.

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More Questions Heat and Mass Transfer:

Q.  
When the ratio of the Grashoff number and to the square of Reynolds number is one, the dominant mechanism of heat transfer is

A. free convection

B. entry length problem in laminar forced conduction (developing thermal boundary layer)

C. mixed convection (both free and forced)

D. forced convection


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Q.  
The ratio of kinematic viscosity to thermal diffusivity is called the _______ number.

A. Peclet

B. Prandtl

C. Stanton

D. Nusselt


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Convective heat transfer, in which heat is transferred by movement of warmed matter is described by

A. Fourier's law

B. Newton's law of cooling

C. Fick's law

D. none of these


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Value of Prandtl number for water ranges from

A. 1 to 2

B. 5 to 10

C. 100 to 500

D. 1000 to 2000


Answer & Explanation
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