Power number is the ratio of____________________?
Correct answer: A. Drag stress to inertial stress
- A. Drag stress to inertial stress
- B. Inertial stress to drag stress
- C. Inertial stress to gravitational stress
- D. Gravitational stress to drag stress
Explanation
The power number compares the power or drag effect required for agitation with the inertial effect, and is written as Np = P/(ρN³D⁵). Hence it represents drag stress relative to inertial stress.
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 centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the power consumed now will be _____________ hp?
A Newtonian fluid is that__________________?
Bernoulli's equation accounts for the_____________________?
A hydraulic press has a ram of 10 cms in diameter and a plunger of 1 cm in diameter. The force required on the plunger to raise a weight of 10 tons on the ram is _____________ kg?
Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible ?
Propeller type centrifugal pumps are most suitable for__________________?