Thermal conductivity of a gas at low density, ___________ with increase in temperature ?

Related Mcqs:

Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?

A. Current B. Voltage C. Resistance D. None of these...

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

A. Geometric B. Arithmetic C. Logarithmic D. Either A., B. or C....

In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will___________________?

A. Increase B. Decrease C. Remain unchanged D. Either increase or decrease; depends on the coolant flow rate...

Peclet number (Pe) is given by____________________?

A. Pe = Re.Pr B. Pe = Re/Pr C. Pe = Pr/Re D. Pe = Nu.Re...

Tube pitch is the _______________ of tube diameters and the clearances?

A. Sum B. Difference C. Ratio D. None of these...