Chemical Engineering Mcqs

In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________?

• (A)  T
• (B)  √T
• (C)  T2
• (D)  1/T

Answer

Submitted By :Ali Uppal

Hypersorption refers to a ________________ process?

• (A)  Fixed bed absorption
• (B)  Moving bed absorption
• (C)  Fixed bed adsorption
• (D)  Moving bed adsorption

Answer

Submitted By :Ali Uppal

Moisture contained by a substance in excess of the equilibrium moisture is called the _______________ moisture?

• (A)  Unbound
• (B)  Free
• (C)  Critical
• (D)  Bound

Answer

Submitted By :Ali Uppal

In case of ______________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated?

• (A)  Molecular
• (B)  Azeotropic
• (C)  Extractive
• (D)  Flash

Answer

Submitted By :Ali Uppal

If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is________________?

• (A)  0.31
• (B)  0.107
• (C)  0.017
• (D)  0.215

Answer

Submitted By :Ali Uppal

If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?

• (A)  100
• (B)  > 100
• (C)  < 100
• (D)  None of these

Answer

Submitted By :Ali Uppal

McCabe-Thiele method________________?

• (A)  Uses molal units for material and energy balance
• (B)  Uses weight fractions to express liquid and vapour composition
• (C)  Can use any type of units
• (D)  Is more accurate than Ponchon-Savarit method

Answer

Submitted By :Ali Uppal

The relation, Sc = Pr = 1, is valid, when the mechanism of ______________ transfer is same?

• (A)  Heat and mass
• (B)  Mass and momentum
• (C)  Heat and momentum
• (D)  Heat, momentum and mass

Answer

Submitted By :Ali Uppal

Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and _________________?

• (A)  Humidified with wet bulb temperature decreasing
• (B)  Humidified at constant wet bulb temperature
• (C)  Dehumidified
• (D)  None of these

Answer

Submitted By :Ali Uppal

Components, having widely different boiling point in a binary mixture, can be separated using ________________ distillation?

• (A)  Molecular
• (B)  Extractive
• (C)  Steam
• (D)  Simple

Answer

Submitted By :Ali Uppal