Chemical Engineering Mcqs

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

Answer

Submitted By :Ali Uppal

_______________ extractor is used for the concentration of radioactive nuclear waste?

• (A)  Pulsed column
• (B)  Sieve plate
• (C)  Mixer-settler
• (D)  Bollman

Answer

Submitted By :Ali Uppal

Removal of ______________ exemplifies an adsorption unit operation?

• (A)  Uranium from its ore
• (B)  Water from petrol
• (C)  Ammonia from coke oven gas
• (D)  Mustard oil from mustard seed

Answer

Submitted By :Ali Uppal

The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an ___________________?

• (A)  Pure component
• (B)  Binary mixture
• (C)  Ternary mixture
• (D)  Insoluble binary system

Answer

Submitted By :Ali Uppal

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the ________________ temperature?

• (A)  Dry-bulb
• (B)  Wet-bulb
• (C)  Dew point
• (D)  Adiabatic saturation

Answer

Submitted By :Ali Uppal

In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of_________________?

• (A)  1.5
• (B)  -0.6
• (C)  -1.5
• (D)  0.6

Answer

Submitted By :Ali Uppal

The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

• (A)  Liquid side
• (B)  Gas side
• (C)  Interfacial
• (D)  Both liquid and gas side

Answer

Submitted By :Ali Uppal

Minimum reflux ratio in a distillation column results in__________________?

• (A)  Optimum number of trays
• (B)  Minimum reboiler size
• (C)  Maximum condenser size
• (D)  Minimum number of trays

Answer

Submitted By :Ali Uppal

Steady state equimolal counter diffusion is encountered in_____________________?

• (A)  Separation of a binary mixture by distillation
• (B)  Absorption of NH3 from air by water
• (C)  All liquid-liquid diffusion systems
• (D)  All liquid-solid diffusion systems

Answer

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

Answer

Submitted By :Ali Uppal