Chemical Engineering Mcqs

For a ternary mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a ____________ of the equilateral triangular co-ordinates?

(A) Binary mixture is represented by the apex
(B) Binary mixture is represented by any point inside
(C) Ternary mixture is represented by the sides
(D) Pure component is represented by the apex

Submitted By :Ali Uppal

The minimum liquid rate to be used in an absorber corresponds to an operating line__________________?

(A) Of slope = 1
(B) Of slope = 0.1
(C) Tangential to the equilibrium curve
(D) None of these

Submitted By :Ali Uppal

Separation of two volatile liquids by distillation makes use of their___________________?

(A) Selectivity
(B) Relative volatility
(C) Solubility
(D) Density difference

Submitted By :Ali Uppal

The critical moisture content in case of drying indicates the ________________ rate period?

(A) Beginning of falling
(B) Beginning of constant
(C) End of falling
(D) None of these

Submitted By :Ali Uppal

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is_________________?

(A) Equal to the heat of formation of surface compound
(B) Equal to the heat of wetting
(C) Zero
(D) Called integral heat of adsorption

Submitted By :Ali Uppal

A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)) ?

(A) M(Xo – XF)
(B) M(Xo/XF)
(C) M ln(Xo/XF)
(D) MXo ln(Xo/XF)

Submitted By :Ali Uppal

Ammonia present in the coke oven gas is removed by washing with___________________?

(A) Caustic solution
(B) Dilute ammoniacal liquor
(C) Dilute HCl
(D) Ethanolamine

Submitted By :Ali Uppal

Most important factor to be considered in the selection of packings for absorbers is the ______________ of packing?

(A) Size
(B) Durability
(C) Porosity
(D) Cost

Submitted By :Ali Uppal

Which of the following provides maximum contact surface for a liquid-vapour system ?

(A) Packed tower
(B) Bubble-cap plate column
(C) Sieve-plate column
(D) Wetted wall column

Submitted By :Ali Uppal

Experimental determination of ________________ is done by wetted wall column method?

(A) Diffusion co-efficient
(B) Mass transfer co-efficient
(C) NTU
(D) None of these

Submitted By :Ali Uppal

Previous
First
....
163
164
165
166
167
....
811
Next