Jacobs Engineering Group Piping Designer Interview Questions and Answers

E3d software in piping designing

Q1. Technical questions related by piping designing
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Q1. Piping, Equipment
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Q1. How many type gaskets
Ans. 
There are several types of gaskets used in piping, including spiral wound, ring joint, and sheet gaskets.
• Spiral wound gaskets are commonly used for high pressure and temperature applications.

• Ring joint gaskets are used in high pressure and high temperature applications, typically in oil and gas industries.

• Sheet gaskets are versatile and come in various materials such as rubber, cork, and graphite.
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Q1. What is piping?
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Piping refers to a system of pipes used to transport fluids or gases from one location to another.
• Piping is used in various industries such as oil and gas, chemical, pharmaceutical, and construction.

• It involves the design, fabrication, installation, and maintenance of pipes.

• Pipes can be made of materials like steel, copper, PVC, or HDPE.

• Piping systems can include fittings, valves, and other components to control the fl...read more
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Q2. What are the types of pipes used in piping?
Ans. 
Types of pipes used in piping include steel, copper, PVC, and HDPE.
• Steel pipes: commonly used for high-pressure applications

• Copper pipes: used for water supply lines

• PVC pipes: lightweight and easy to install, commonly used for drainage systems

• HDPE pipes: high-density polyethylene pipes used for underground gas and water lines
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Q1. What is bevel angle of piping?
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Bevel angle of piping refers to the angle formed between the prepared edge of the pipe and a plane perpendicular to the pipe axis.
• Bevel angle is typically specified in degrees, such as 30° or 45°.

• It is important for welding processes to ensure proper fit-up and joint strength.

• Different bevel angles may be required based on the material being used and the welding procedure being employed.
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Q1. Piping material Details and ASME codes
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Q1. Expansion stress formula
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Expansion stress formula calculates the stress caused by thermal expansion or contraction.
• Expansion stress formula is given by: ΔL/L = αΔT, where ΔL is the change in length, L is the original length, α is the coefficient of thermal expansion, and ΔT is the change in temperature.

• The formula can be used to calculate the stress caused by thermal expansion or contraction in piping systems.

• The formula assumes that the mater...read more
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Q2. IBR LINES details.pressure ratings etc
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Q3. Sustain stress formula
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Sustain stress formula calculates the maximum allowable stress for a given material under sustained loading.
• Sustain stress formula is used in piping stress analysis to determine the maximum allowable stress for a given material under sustained loading.

• The formula takes into account the material's yield strength, ultimate tensile strength, and safety factor.

• Sustain stress formula is expressed as S = (Sy/FS) + (Su/FS) * ...read more
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