Chemical Engineering Mcqs

Rayleigh’s equation applies to ________________ distillation?

• (A)  Continuous
• (B)  Steam
• (C)  Differential
• (D)  Flash

Answer

Submitted By :Ali Uppal

Blowdown in a cooling tower__________________?

• (A)  Means discarding a small fraction of circulating water to prevent and limit the concentration of salt and impurities
• (B)  Increases the scale forming tendencies of water
• (C)  Is undesirable
• (D)  All

Answer

Submitted By :Ali Uppal

Water entrained by circulating air in cooling towers is termed as________________?

• (A)  Drift
• (B)  Blow down
• (C)  Vapor load
• (D)  None of these

Answer

Submitted By :Ali Uppal

Alcohol is dehydrated using ______________ distillation?

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

Answer

Submitted By :Ali Uppal

When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is _______________ distillation?

• (A)  Continuous
• (B)  Steam
• (C)  Azeotropic
• (D)  None of these

Answer

Submitted By :Ali Uppal

Mechanism of moisture removal in case of freeze drying of food stuff is by ___________________?

• (A)  Evaporation
• (B)  Sublimation
• (C)  Dehydration
• (D)  Adsorption

Answer

Submitted By :Ali Uppal

Molality is defined as the number of gm moles of solute per _________________ of solvent ?

• (A)  Litre
• (B)  gm
• (C)  Kg
• (D)  m3

Answer

Submitted By :Ali Uppal

The drying time between fixed moisture content within diffusion controlled ‘falling rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?

• (A)  √T
• (B)  T
• (C)  T2
• (D)  T3

Answer

Submitted By :Ali Uppal

The dew point of an unsaturated gas-vapor mixture does not depend upon the _________________ of the mixture?

• (A)  Composition
• (B)  Temperature
• (C)  Total pressure
• (D)  All A,

Answer

Submitted By :Ali Uppal

The Hatta number is important in_________________?

• (A)  Multi-component distillation
• (B)  Binary distillation
• (C)  Gas absorption without chemical reaction
• (D)  Gas absorption with chemical reaction

Answer

Submitted By :Ali Uppal