Mass Transfer Objective Test (Diploma Level)

The reflux ratio in a distillation column controls the:

• Feed rate

• Purity of the products

• Column pressure

• Flow direction

Azeotropic mixtures present a challenge in distillation because:

• They have no boiling point

• They have a constant boiling point composition

• They require very high temperatures

• They cannot be separated

Entrainment in a distillation column is undesirable because it can:

• Increase product purity

• Reduce separation efficiency

• Improve heat transfer

• Enhance reflux

In a single-stage distillation, the separation of components is:

• Complete

• Highly efficient

• Partially achieved

• Not possible

Which of these is NOT a common type of distillation process?

• Flash distillation

• Crystallization

• Rectification

• Steam distillation

What is the main purpose of packing material in a distillation column?

• Increase pressure

• Increase interfacial area

• Reduce heat loss

• Improve reflux ratio

In a distillation column, what happens to the vapor temperature as it rises?

• Decreases

• Increases

• Remains constant

• Becomes unpredictable

A mixture with a higher boiling point component will have a:

• Lower relative volatility

• Higher relative volatility

• Equal relative volatility

• No effect on relative volatility

What is the primary separation mechanism in distillation?

• Size exclusion

• Chemical reaction

• Vapor-liquid equilibrium

• Filtration

Which factor is LEAST likely to affect the efficiency of a distillation column?

• Feed composition

• Reflux ratio

• Feed temperature

• Packing material