Mechanical Operations MCQs

The porosity of a compressible cake is

Close circuit grinding by a ball mill with air sweeping employs a

Pick out the wrong statement pertaining to the roll crushers.

Filter medium resistance is important during the __________ of filtration.

__________ centrifuge is the most suitable for separation of non-friable crystals.

Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.

Which of the following is used for primary crushing of very hard lumpy materials?

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:
P_o = ρ/ρN³D⁵: Power number
Re = ρ ND²/μ: Reynold's number
N is the impeller rotational speed and D is the impeller diameter.

The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the