Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the _____________ zone?
Correct answer: D. Highly turbulent
- A. Laminar
- B. Transition
- C. Both A & B
- D. Highly turbulent
Explanation
In highly turbulent flow, mixing rapidly eliminates entrance-region effects, so the heat-transfer coefficient is essentially independent of the tube length-to-diameter ratio. Laminar flow is much more sensitive to developing-flow length.
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
The number of kg vaporised per kg of steam fed to the evaporator is defined as____________?
With increase in porosity, the thermal conductivity of a solid substance__________________?
Which type of heat exchanger is preferred for heavy heat loads ?
Which of the following is unimportant in forced convection ?
Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) ?
Dittus-Boelter equation cannot be used for molten metals mainly due to its very low_____________________?