chemical engineering mechanical operations MCQs – Page 23

Practise multiple-choice questions from chemical engineering mechanical operations for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering mechanical operations Mcqs
441. The basic filtration equation is given as dt/dV = (?/A ?P). [(? .CV/A) + Rm], where, V is volume of the filtrate; A is the filtration area, a is specific cake resistance, ? is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm; assume incompressible cake ?
comments icon0
A. 20

B. 30

C. 25

D. 10

442. Pick out the wrong statement?
comments icon0

A. A dust catcher is simply an enlargement in a pipeline which permits the solids to settle down

B. Wear and tear in wet crushing is more than that in dry crushing of materials

C. to reduction in velocity of the dust laden gas

D. Size enlargement (opposite of size reduction) is not a mechanical operation

E. Recycled coarse material to the grinder by a classifier is termed as circulating load

443. For benefication of iron ore, the most commonly used method is______________?
comments icon0

A. Froth floatation

B. None of these

C. Jigging & tabling

D. Flocculation

444. ______________ is used for producing a thick suspension from a thin slurry?
comments icon0

A. Rotary drum vacuum filter

B. Plate and frame filter press

C. Pressure filter thickener

D. Cartridge filter

445. _____________ is the most commonly used filter aid?
comments icon0

A. Semi-plastic clay

B. Fullers earth

C. Vermiculite

D. Diatomaceous earth