Chemical Engineering Mcqs

Swenson-Walker crystalliser is a __________________ unit ?

(A) Continuous
(B) Batch
(C) Semi-batch
(D) Cooling (adiabatic)-cum-evaporation

Submitted By :Ali Uppal

A 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m × 1m × 1cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is ____________________?

(A) 1000
(B) 1500
(C) 2000
(D) 2500

Submitted By :Ali Uppal

Henry’s law states that the ________________________?

(A) Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
(B) Partial pressure of a component over a solution is proportional to the mole fraction in the vapour
(C) Vapour pressure is equal to the product of the mole fraction and total pressure
(D) Partial pressure is equal to the product of the mole fraction and total pressure

Submitted By :Ali Uppal

Desulphurisation of petrol is done in a _____________________?

(A) Bollman extractor
(B) Rotating disc extractor
(C) Packed extraction column
(D) Plate type extraction column

Submitted By :Ali Uppal

Pressure drop through plate tower as compared to that through packed tower, for the same duty will be___________________?

(A) Less
(B) More
(C) Equal
(D) Either

Submitted By :Ali Uppal

For gas absorption, low viscosity solvents are preferred, because of their ____________________?

(A) Better flow characteristics
(B) Low pumping pressure drop
(C) Rapid absorption rates
(D) All

Submitted By :Ali Uppal

Which of the following increases during evaporative cooling process with recirculated water supply ?

(A) Wet bulb temperature
(B) Relative humidity
(C) Partial pressure of vapour
(D) Both

Submitted By :Ali Uppal

Drying of a solid involves _________________ transfer ?

(A) Only heat
(B) Only mass
(C) Both heat and mass
(D) None of these

Submitted By :Ali Uppal

In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of _______________ is zero?

(A) Interface
(B) Gas phase
(C) Liquid phase
(D) All A ,

Submitted By :Ali Uppal

Which of the following is used for the concentration of rubber latex ?

(A) Agitated film evaporator
(B) Long tube vertical evaporator
(C) Short tube evaporator
(D) Calandria

Submitted By :Ali Uppal

Previous
First
....
158
159
160
161
162
....
811
Next