Mechanical Operations - Study Mode
[#181] Colloidal mills are used for __________ grinding.
Correct Answer
(D) Ultrafine
[#182] Cyclones are used primarily for separating
Correct Answer
(B) Solids from fluids
[#183] For spheres, the surface shape factor is given by (where, A = area, V = volume, and D = diameter)
Correct Answer
(A) π(=A/D²)
[#184] For a turbine agitated and baffled tank, operating at low Reynold's number (based on impeller diameter), the power number (N p ) varies with N Re as
Correct Answer
(D) N p ∝ $$frac{1}{{{{ ext{N}}_{{ ext{Re}}}}}}$$
[#185] The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)
Correct Answer
(D) Independent of ΔP