Tata Steel Chemist Interview Questions and Answers

DM water is produced by removing impurities from raw water through a process called demineralization.

• DM water stands for demineralized water.

• It is produced by removing minerals and impurities from raw water.

• The process of demineralization involves various techniques such as ion exchange, reverse osmosis, and distillation.

• DM water is used in various industries like power plants, pharmaceuticals, and electronics manufact...read more

Preheaters are devices used to heat a substance or material before a process or operation.

• Types of preheaters include direct-fired preheaters, indirect-fired preheaters, regenerative preheaters, and recuperative preheaters.

• Direct-fired preheaters directly heat the substance using a flame or burner.

• Indirect-fired preheaters heat the substance indirectly through a heat transfer medium.

• Regenerative preheaters use a rotati...read more

Proper coal blend can be determined by analyzing the properties of different coals and their compatibility with each other.

• Analyze the properties of different coals such as ash content, volatile matter, fixed carbon, etc.

• Determine the required coke quality and select coals that can produce coke of desired quality.

• Consider the availability and cost of different coals.

• Ensure compatibility of coals by conducting small-sca...read more

Flushing and pickling are processes used to clean and protect hydraulic systems.

• Flushing involves removing contaminants and debris from the system using a flushing fluid.

• Pickling involves applying a protective coating to the system to prevent corrosion.

• Both processes are important for maintaining the performance and longevity of hydraulic systems.

• Examples of flushing fluids include water, solvents, and specialized flus...read more

Preventive maintenance is planned maintenance to prevent breakdowns, while breakdown maintenance is repairing equipment after it has failed.

• Preventive maintenance is scheduled and proactive

• Breakdown maintenance is reactive and occurs after equipment failure

• Preventive maintenance reduces downtime and increases equipment lifespan

• Breakdown maintenance can be costly and cause production delays

• Examples of preventive mainten...read more