Ongc Petro Additions Interview Questions and Answers

Centrifugal pumps are commonly used in the petrochemical industry.

• Centrifugal pumps are preferred due to their ability to handle high flow rates and low viscosity fluids.

• Positive displacement pumps are also used for high viscosity fluids.

• Examples of centrifugal pumps used in petrochemical industry include end suction pumps, split case pumps, and multistage pumps.

• Examples of positive displacement pumps used in petrochem...read more

P&ID stands for Piping and Instrumentation Diagram, while PFD stands for Process Flow Diagram.

• P&ID is a detailed diagram that shows the piping and instrumentation of a process system, including valves, instruments, and equipment.

• PFD is a simplified diagram that shows the major components and flow paths of a process system.

• P&ID is used by engineers and operators to understand the process system and make modifications.

• PF...read more

Petrol and diesel are liquid fuels made up of carbon and hydrogen, while an emulsifier is a substance that helps mix two immiscible liquids.

• Petrol and diesel are commonly used as fuels for vehicles and machinery.

• Emulsifiers are often used in food production to mix oil and water-based ingredients, such as in salad dressings or mayonnaise.

• Petrol is distilled at a lower temperature than diesel, resulting in a lighter and ...read more

The final product of this process is tar or bitumen.

• The process is not specified, so it's difficult to give specific pointers.

• Tar and bitumen are commonly used in road construction and roofing.

• Tar is a dark, thick liquid made from coal or wood, while bitumen is a sticky, black substance made from crude oil.

• Both tar and bitumen are used as binders in asphalt for road construction.

• Tar is also used in waterproofing and as...read more

Design and development basis in mechanical engineering

• Design and development are the foundation of mechanical engineering

• Design involves creating a blueprint or plan for a product or system

• Development involves turning the design into a functional product or system

• Design and development must take into account factors such as cost, safety, and efficiency

• Examples of design and development in mechanical engineering include...read more

Boiler scaling is the accumulation of mineral deposits on the internal surfaces of a boiler.

• Boiler scaling occurs when minerals in the water, such as calcium and magnesium, precipitate out and form a hard, insulating layer on the boiler's heat transfer surfaces.

• Scaling reduces heat transfer efficiency, increases energy consumption, and can lead to overheating and equipment failure.

• Preventative measures include water tr...read more

Corrosion is the process of deterioration of a material, usually a metal, due to chemical reactions with its environment.

• Corrosion occurs when a metal reacts with substances in its environment, such as oxygen or water.

• Common types of corrosion include rusting of iron and tarnishing of silver.

• Corrosion can weaken structures and equipment, leading to potential safety hazards.

• Preventative measures against corrosion includ...read more