Bharat Rasayan Production Interview Questions and Answers for Experienced

Cavitation is the formation and collapse of vapor bubbles in a liquid due to pressure changes.

• Occurs in pumps, propellers, and other fluid machinery

• Can cause damage to equipment and decrease efficiency

• Can be prevented by proper design and maintenance

• Examples include erosion of propeller blades and damage to pump impellers

Threshold limit value is the maximum concentration of a substance that a worker can be exposed to without adverse effects.

• TLV is a term used in occupational health and safety

• It is the maximum level of exposure to a hazardous substance

• TLVs are set by organizations like ACGIH and OSHA

• Examples of TLVs include 8-hour time-weighted averages for chemicals like benzene and carbon monoxide

Flash point is the lowest temperature at which a substance can vaporize to form an ignitable mixture in air.

• Flash point is important in determining the safety of handling and storing flammable substances.

• It is measured using various methods such as Pensky-Martens closed cup tester and Abel closed cup tester.

• For example, gasoline has a flash point of -45°C, while diesel has a flash point of 52°C.

• A substance with a low f...read more