Value of Prandtl number for water ranges from_________________?
Correct answer: B. 5 to 10
- A. 1 to 2
- B. 5 to 10
- C. 100 to 500
- D. 1000 to 2000
Explanation
For water near ordinary engineering temperatures, the Prandtl number is commonly of the order of 5 to 10, decreasing as temperature rises. This reflects water's relatively high momentum diffusivity compared with thermal diffusivity.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Heat Transfer Operations
645 free Heat Transfer Operations MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Heat Transfer Operations questions
A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time ___________________?
Unsteady state heat conduction occurs, when_______________?
_____________ equation relates the thermal conductivity of a solid to its temperature ?
Dropwise condensation occurs on ______________ surfaces?
For a given ambient air temperature with increase in the thickness of insulation of a hot cylindrical pipe, the rate of heat loss from the surface would ?
The sum of reflectivity and absorptivity for an opaque body is equal to____________________?