Infosys Interview Questions and Answers

NPSH stands for Net Positive Suction Head. It is the measure of the pressure required at the suction port of a pump to keep the pump from cavitating.

• NPSH is important to ensure that the pump does not cavitate, which can cause damage to the pump and decrease its efficiency.

• NPSH is calculated by subtracting the vapor pressure of the liquid being pumped from the absolute pressure at the suction port of the pump.

• NPSH is affected by factors such as the pump design, the fluid being...read more

IBR stands for Indian Boiler Regulations. A line is IBR certified if it meets the criteria set by the regulations.

• IBR is a set of regulations that govern the design, construction, and operation of boilers and pressure vessels in India.

• The criteria for defining a line to be IBR certified include factors such as the type of material used, the design pressure and temperature, and the safety features installed.

• For example, a boiler with a design pressure of more than 1 kg/cm² and...read more

Presence of dissolved oxygen in hydrocarbon gas mixture can lead to explosion or fire.

• Dissolved oxygen can react with hydrocarbons and cause combustion

• This can lead to an explosion or fire

• Oxygen scavengers are used to remove dissolved oxygen from hydrocarbon gas mixtures

Furnace auto ignitor is a device that automatically lights the furnace burner.

• The ignitor is responsible for creating a spark or glow that ignites the gas in the furnace.

• It ensures that the furnace starts up quickly and efficiently.

• Without the ignitor, the furnace would need to be lit manually.

• Examples of furnace auto ignitors include hot surface ignitors and intermittent pilot ignitors.

The current company cracker plant is smaller in size and produces fewer products compared to Haldia Petrochemicals Cracker plant.

• The current company cracker plant has a production capacity of 500,000 tons per year while Haldia Petrochemicals Cracker plant has a capacity of 700,000 tons per year.

• Haldia Petrochemicals Cracker plant produces a wider range of products including ethylene, propylene, and butadiene while the current company cracker plant only produces ethylene.

• Haldi...read more

APC control is an advanced process control system that uses mathematical models to optimize manufacturing processes.

• APC control uses real-time data to adjust process parameters and maintain optimal conditions.

• It can improve product quality, reduce waste, and increase efficiency.

• Examples of APC control include controlling temperature and pressure in chemical manufacturing, or adjusting machine settings in semiconductor fabrication.

• APC control requires expertise in both process...read more

Yes, welding in a vacuum is possible.

• Welding in a vacuum is possible because the absence of air prevents oxidation of the materials being welded.

• Specialized equipment and techniques are required for welding in a vacuum to ensure proper bonding of materials.

• Examples of welding in a vacuum include aerospace components and certain types of scientific equipment.

Emergency procedures are predefined steps to be taken in case of an emergency to ensure safety and minimize damage.

• Emergency procedures should be clearly defined and communicated to all employees.

• They should cover a range of emergencies such as fire, natural disasters, medical emergencies, etc.

• Procedures should include evacuation plans, emergency contacts, and equipment usage.

• Regular training and drills should be conducted to ensure preparedness.

• Examples of emergency procedur...read more