Gem Engserv Interview Questions and Answers

Pumps are devices used to move fluids from one place to another. They are classified based on their working principle and application.

• Pumps can be classified as positive displacement pumps and dynamic pumps.

• Positive displacement pumps move a fixed amount of fluid with each stroke or rotation. Examples include reciprocating pumps and rotary pumps.

• Dynamic pumps use velocity to move fluids. Examples include centrifugal pumps and axial flow pumps.

• Pumps can also be classified base...read more

Yes, there are many types of valves including ball, gate, globe, butterfly, check, and needle valves.

• Valves are used to control the flow of fluids or gases in a system.

• Ball valves have a spherical closure unit that allows for quick shut-off.

• Gate valves have a flat closure unit that slides into place to stop flow.

• Globe valves have a spherical closure unit that moves up and down to regulate flow.

• Butterfly valves have a disc-shaped closure unit that rotates to control flow.

• Check...read more

The hydro test pressure of an equipment connection is the pressure at which the connection is tested for leaks and strength.

• Hydro test pressure is determined based on the design and operating conditions of the equipment.

• It is usually expressed in units of pressure, such as psi or bar.

• The test pressure should be higher than the maximum operating pressure to ensure the connection's integrity.

• The test pressure may vary depending on the type of equipment and its intended use.

• For ...read more

RTJ Lens Rings are used in flange connections to provide a seal and prevent leakage.

• RTJ Lens Rings are used in high-pressure and high-temperature applications.

• They are commonly used in industries such as oil and gas, petrochemical, and power generation.

• RTJ Lens Rings provide a reliable and secure seal between flanges, preventing leakage.

• They are designed to withstand extreme conditions and maintain their sealing properties over time.

• Examples of applications include pipeline c...read more

Metallic gaskets are used in various industries for high-pressure and high-temperature applications.

• Spiral wound gasket: made of alternating layers of metal and filler material

• Ring joint gasket: used in high-pressure applications, has a metallic ring

• Metal jacketed gasket: consists of a soft filler material enclosed in a metal jacket

• Kammprofile gasket: has a serrated metal core with a soft sealing material

• Corrugated metal gasket: made of thin metal with corrugations for flexib...read more

Types of pump defrens

• Centrifugal pumps

• Reciprocating pumps

• Rotary pumps

• Diaphragm pumps

• Gear pumps

• Vane pumps

• Screw pumps

• Peristaltic pumps

Design pressure multiplied by 1.5

• The question is asking for the value that is 1.5 times the design pressure

• To find the answer, multiply the design pressure by 1.5

• For example, if the design pressure is 100 psi, the answer would be 150 psi