Indian Steel Corporation Interview Questions, Process, and Tips

Siemens plc OB, FB, FV, and DB are different types of blocks used in programming Siemens PLCs.

• OB (Organization Block) is used for organizing and controlling the program execution.

• FB (Function Block) is used for creating reusable functions or subroutines.

• FV (Function Value) is used for passing parameters to function blocks.

• DB (Data Block) is used for storing and managing data in the PLC program.

The number of relays in transfer protection varies depending on the specific system and requirements.

• The number of relays in transfer protection can range from a few to several dozen, depending on the complexity of the system.

• Relays are used in transfer protection to detect faults, isolate faulty sections, and ensure smooth transfer of power.

• Examples of relays used in transfer protection include differential relays, di

RO process is a water treatment method that uses a semi-permeable membrane to remove impurities.

• RO stands for Reverse Osmosis

• It involves applying pressure to a solution to force water molecules through a semi-permeable membrane

• The membrane blocks impurities and contaminants, producing clean water

• RO is commonly used in desalination plants to produce drinking water from seawater

Boiler process involves heating water to produce steam which is used for various purposes.

• Water is heated in the boiler using fuel or electricity

• The heated water produces steam which is used for heating or powering turbines

• The steam is then condensed back into water and returned to the boiler for reuse

• Boiler process can be illustrated using a simple diagram