Junior Engineer - Chemical Interview Questions and Answers for Freshers

Different types of fire extinguishers are used for different types of fires.

• Class A fires (ordinary combustibles) can be extinguished with water, foam, or dry chemical extinguishers.

• Class B fires (flammable liquids and gases) require foam, dry chemical, or carbon dioxide extinguishers.

• Class C fires (electrical fires) require carbon dioxide or dry chemical extinguishers.

• Class D fires (flammable metals) require special dry powder extinguishers.

• Class K fires (cooking oils and fa...read more

Heat exchangers transfer heat between two fluids while condensers convert vapor to liquid by releasing heat.

• Heat exchangers come in various types such as shell and tube, plate and frame, and spiral

• Uses of heat exchangers include heating and cooling processes in chemical plants, power generation, and HVAC systems

• Design considerations for heat exchangers include fluid flow rates, pressure drop, and material selection

• Condensers are a type of heat exchanger that convert vapor to ...read more

Distillation columns are used to separate components of a mixture based on their boiling points.

• There are two main types of distillation columns: batch and continuous

• Batch distillation columns are used for small-scale operations and have a single feed and product stream

• Continuous distillation columns are used for large-scale operations and have multiple feed and product streams

• The working principle of a distillation column is based on the fact that different components of a m...read more