Bechtel Process Engineer Interview Questions and Answers

Q1. PSV types and their selection
Ans. 
Different types of Pressure Safety Valves (PSVs) and factors to consider when selecting them
• Types of PSVs include conventional, balanced bellows, pilot-operated, and rupture disc

• Factors to consider when selecting a PSV include set pressure, relieving capacity, back pressure, and operating temperature

• Conventional PSVs are commonly used for low to medium pressure applications, while pilot-operated PSVs are suitable for h...read more
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Q2. P&IDS, PFDS, HMB, SIMULATION
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Q1. Based on points mentioned in resume, asked to draw PFD or block diagram for processes on which you have worked and questions on that
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Q2. Problem on pump hydraulics and control valve hydraulics
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Q3. Questions on safety valves are expected, I have not did safety valves so those questions were skipped
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Q4. Questions on compressors
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Q5. Questions on relief systems
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Simple aptitude question s related to general maths identity and local technical questions

Q1. Hr will ask about previous experience. What will improve in this company
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Q1. Line sizing criteria
Ans. 
Line sizing criteria is based on factors like flow rate, pressure drop, velocity, and material compatibility.
• Consider the flow rate of the fluid being transported

• Calculate the pressure drop allowed in the system

• Determine the velocity of the fluid to prevent erosion or corrosion

• Ensure the material of the line is compatible with the fluid being transported
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Q1. Salary expectation
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Q1. How to make p&ID and perform line Sizing
Ans. 
P&ID is made by identifying process equipment and connecting them with pipes. Line sizing is done based on process requirements.
• Identify process equipment and their connections

• Determine process requirements such as flow rate and pressure drop

• Select appropriate pipe size based on process requirements

• Consider factors such as fluid properties, pipe material, and layout

• Use software tools such as AutoCAD or SmartPlant P&ID
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Basic aptitude not very hard

Q1. Draw pump curve? Write Bernoulli equation Hagen pouseille eq.? Questions from CV. Basically full CV and basic questions from chemical engineering
Ans. 
The pump curve shows the relationship between flow rate and head. The Bernoulli equation relates pressure, velocity, and elevation in a fluid flow system.
• The pump curve is a graph showing the performance of a pump by plotting flow rate against head.

• The Bernoulli equation is a fundamental equation in fluid mechanics that relates the pressure, velocity, and elevation of a fluid at any point in a flow system.

• Questions fro...read more
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