Hindustan Petroleum Mechanical Maintenance Engineer Interview Questions and Answers

A heat exchanger is a device used to transfer heat between two or more fluids. A floating heat exchanger is a type of heat exchanger that is not fixed in place.

• Heat exchangers are used in a variety of industries, including HVAC, chemical processing, and power generation.

• They work by transferring heat from one fluid to another through a solid barrier.

• Floating heat exchangers are typically used in marine applications, wh...read more

Valves can be classified based on their function such as isolation, regulation, and safety.

• Isolation valves are used to completely shut off the flow of fluid or gas.

• Regulation valves are used to control the flow rate or pressure of fluid or gas.

• Safety valves are used to release excess pressure to prevent damage to the system or equipment.

• Examples of isolation valves include gate valves and ball valves.

• Examples of regul...read more

No, RT is not used in small bore socket weld.

• Small bore socket welds are typically inspected using visual inspection and dye penetrant testing.

• Radiographic testing (RT) is not necessary for small bore socket welds.

• RT is typically used for larger welds or critical applications where defects could have severe consequences.