For a turbine agitated and baffled tank, operating at low Reynold’s number (based on impeller diameter), the power number (Np) varies with NRe as_________________?

Related Mcqs:

At low Reynold’s number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5: Power number Re = ρ N D2/μ: Reynold’s number N is the impeller rotational speed, and D is the impeller diameter ?

A. Po ∝ Re-1.0 B. Po ∝ Re0.0 C. Po ∝ Re0.5 D. Po ∝ Re1.0...

Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator ?

A. Cresylic acid B. Copper sulphate C. Calcium carbonate D. Sodium carbonate...

Wheat is ground into flour in a___________________?

A. Hammer crusher B. Roller crusher C. Impact mill D. Fluid energy mill...

The energy consumed by a ball mill depends on__________________?

A. Its speed B. Its ball load C. The density of the material being ground D. All A., B. and C....

Two particles are called to be equal settling, if they are having the same ?

A. Size B. Specific gravity C. Terminal velocities in the same fluid & in the same field of force D. None of these...