Chemical Engineering Mcqs

The specific surface of spherical particles is given by (where D and ρ are diameter and density of particle) ?

(A) 6/D.ρ
(B) 2/D.ρ
(C) 4/
(D) ρ

Submitted By :Ali Uppal

In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?

(A) Square root of the velocity
(B) Square of the viscosity
(C) Filtration time only
(D) Washing time only

Submitted By :Ali Uppal

Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?

(A) S
(B) 1/R
(C) 1/μ
(D) All

Submitted By :Ali Uppal

Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?

(A) kW. sec/kg
(B) kWh/kg
(C) kWh/sec. kg
(D) kg/sec

Submitted By :Ali Uppal

To get ultrafine particles, the equipment used is a _________________?

(A) Ball mill
(B) Rod mill
(C) Hammer crusher
(D) Fluid energy mill

Submitted By :Ali Uppal

Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________?

(A) 1 to 2°
(B) 2 to 5°
(C) 5 to 10°
(D) 10 to 15°

Submitted By :Ali Uppal

Tube mill compared to ball mill_______________________?

(A) Produces finer products
(B) Is long in comparison with its diameter
(C) Uses smaller balls
(D) All

Submitted By :Ali Uppal

In case of a hammer crusher, the final product size depends on the____________________?

(A) Feed rate
(B) Rotor speed
(C) Clearance between hammer & grinding plates
(D) All

Submitted By :Ali Uppal

Size reduction of asbestos and mica is done by____________________?

(A) Hammer mills
(B) Rod mills
(C) Gyratory crushers
(D) Crushing rolls

Submitted By :Ali Uppal

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

Submitted By :Ali Uppal

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