Hydraulic mean depth (Dm) for a circular pipe of diameter 'D' flowing full is 0.25 D. For a circular channel, at Dm = 0.3 D, gives the condition for the maximum ?
Correct answer: B. Mean velocity
- A. Flow rate
- B. Mean velocity
- C. Both 'a' & 'b'
- D. Neither 'a' nor 'b'
Explanation
For a partially filled circular channel, the hydraulic radius reaches its maximum at approximately Dm = 0.3D. Since uniform-flow velocity increases with hydraulic radius, this is the condition for maximum mean velocity, not maximum discharge.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Fluid Flow Operations
909 free Fluid Flow 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 Fluid Flow Operations questions
A 0.5 m high bed made up of a 1 mm dia glass sphere (density 2500 kg/m3 ) is to be fluidised by water (density 1000 kg/m3 ). If at the point of incipient fluidisation, the bed voidage is 40%, the pressure drop across the bed is________________?
Which of the following denotes the effect of compressibility in fluid flow ?
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?
Shear stress in a fluid flowing in a round pipe_________________?
For the transfer of solution of thick slurry, the pump used is a _____________ pump?
In fluid flow, cavitation is caused, if the____________________?