Hindustan Zinc Boiler Field Operator Interview Questions and Answers

There are various types of boilers and different types of boiler mountings are used depending on the type of boiler.

• Types of boilers include fire tube, water tube, and electric boilers.

• Boiler mountings include safety valves, water level indicators, pressure gauges, and blowdown valves.

• The type of boiler and its application determine the type of boiler mounting used.

• For example, a fire tube boiler may have a different s

Safety valve and NRV are important safety devices in a boiler system.

• Safety valve is used to release excess pressure in the boiler to prevent explosions.

• NRV (Non-Return Valve) is used to prevent backflow of water or steam in the system.

• Safety valve should be tested regularly to ensure proper functioning.

• NRV should be installed in the correct direction to prevent backflow.

• Both safety valve and NRV are required by law in...read more

Economiser and APH are used in boilers to increase efficiency and reduce emissions.

• Economiser preheats the feed water using exhaust gases, reducing fuel consumption.

• APH (Air Preheater) preheats the combustion air, reducing fuel consumption and emissions.

• Both are commonly used in large industrial boilers.

• Economiser can increase efficiency by up to 5%.

• APH can increase efficiency by up to 2% and reduce emissions by up to

Na3PO4 is used as a pH buffer in boilers while DM water is used to prevent scaling and corrosion.

• Na3PO4 is added to boiler water to maintain a pH level between 10 and 11, which helps prevent corrosion and scaling.

• DM water, or deionized water, is used in boilers to prevent scaling and corrosion by removing minerals and impurities.

• Using DM water in combination with Na3PO4 can help maintain a clean and efficient boiler sy