Question

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is

a.

1.66

b.

88.66

c.

3.66

d.

dependent on NRe only

Answer: (c).3.66

Interact with the Community - Share Your Thoughts

Uncertain About the Answer? Seek Clarification Here.

Understand the Explanation? Include it Here.

Q. The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is

Similar Questions

Explore Relevant Multiple Choice Questions (MCQs)

Q. Sensible heat of hot industrial flue gases can not be recovered by a/an

Q. The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material hâ‚€ = heat transfer coefficient at the outer surface)

Q. Radiator of an automobile engine is a __________ type of heat exchanger.

Q. In pipe flow, heat is transferred from hot wall to the liquid by

Q. Which of the following has the minimum absorptivity ?

Q. A black body when hot, emits heat radiation of __________ wavelengths.

Q. A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

Q. Vibrations in the tubes of a shell and tube heat exchanger is induced due to the

Q. Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

Q. For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.

Q. The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m². The flux, when the element temperature is increased to 1000°C for the same furnace temperature is

Q. Heat exchangers operating, when the asymptotic range is reached,

Q. In case of a shell and tube heat exchanger, the minimum and maximum baffle spacing is respectively (where, D = inside diameter of the shell)

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

Q. Multiple effect evaporators are used to

Q. Small scale evaporation is done in a

Q. Heat exchanger tubes are never made of

Q. At constant temperature, the thermal conductivities of gases __________ with rise in pressure.

Q. A __________ evaporator employs an annular downtake.

Q. Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.

Recommended Subjects

Are you eager to expand your knowledge beyond Basic Chemical Engineering? We've handpicked a range of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!