Lummus Technology Process Engineer Interview Questions and Answers

Distillation is a process of separating components of a mixture based on their boiling points.

• It involves heating the mixture to vaporize the more volatile component

• The vapor is then condensed and collected as a separate liquid

• Commonly used in the production of alcoholic beverages, fuels, and chemicals

Distillation is a process used to separate components of a mixture based on their boiling points.

• Used in petroleum refining to separate crude oil into different fractions

• Used in the production of alcoholic beverages to separate ethanol from water

• Used in the chemical industry to purify solvents and separate different chemicals

• Can be used in the purification of water

• Can be used in the separation of air into its component

Heat exchangers are devices used to transfer heat between two or more fluids.

• Shell and tube heat exchangers

• Plate heat exchangers

• Double pipe heat exchangers

• Spiral heat exchangers

• Air-cooled heat exchangers

Bubble point and dew point are two important concepts in thermodynamics used to describe the behavior of a mixture of liquids and gases.

• Bubble point is the temperature at which a liquid mixture starts to boil and form bubbles of vapor.

• Dew point is the temperature at which a vapor mixture starts to condense and form droplets of liquid.

• Bubble point and dew point are related to each other through the vapor-liquid equilibr...read more

Chemical and Biological Oxygen Demand are measures of water quality and indicate the amount of oxygen required to break down organic matter.

• Chemical Oxygen Demand (COD) measures the amount of oxygen required to oxidize organic and inorganic matter in water.

• Biological Oxygen Demand (BOD) measures the amount of oxygen required by microorganisms to break down organic matter in water.

• COD is a faster test and measures both ...read more