China Energy Engineering Corporation Mechanical Engineer Interview Questions and Answers

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Q1. Tell me about yourself
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Q2. Explain functioning of pump
Ans. 
A pump is a mechanical device used to move fluids from one place to another by creating pressure.
• Pumps work by converting mechanical energy into fluid flow.

• They typically consist of an inlet, an outlet, and a mechanism to move the fluid.

• Examples include centrifugal pumps, diaphragm pumps, and piston pumps.
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Q1. Basic Question related to mechanical basics
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Q1. Tell me about yourself
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Q2. Strength & Weakness, Where you see 5 years from now.
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Q1. Why would you like to work with shell?
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Q2. Have you worked in any oil and gas facility before now?
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What I know about permit to work system

Q1. Explain your self and where did you working current in 2014
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Q2. Which gas can use for while hot/live tapping
Ans. 
Nitrogen gas is commonly used for hot/live tapping in mechanical engineering.
• Nitrogen gas is inert and non-reactive, making it safe to use in hot/live tapping processes.

• It helps to create a protective atmosphere to prevent explosions or fires.

• Nitrogen gas is readily available and cost-effective.

• Other gases like argon or carbon dioxide can also be used depending on the specific requirements.
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Q3. Which method can we follow for railway/road/river crossings
Ans. 
Various methods can be used for railway/road/river crossings depending on the location and other factors.
• Bridges can be built over the crossing

• Tunnels can be dug under the crossing

• Level crossings can be used for roads

• Flyovers can be constructed for roads

• Ferries can be used for river crossings

• Aqueducts can be built for waterways

• Location, traffic volume, and safety considerations must be taken into account when choosing
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Q4. Which procedure can follow for pipe lines welding while route and filling
Ans. 
The procedure for pipe lines welding while route and filling involves several steps.
• Clean the area to be welded thoroughly

• Tack weld the pipes together

• Weld the root pass

• Fill the remaining gap with weld metal

• Perform post-weld heat treatment if required

• Inspect the weld for defects
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Q5. Cross country pipeline code - Nitrogen
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Q6. Explain About RT, UT, and magnetic partials
Ans. 
RT, UT, and magnetic partials are non-destructive testing methods used in engineering.
• RT stands for Radiographic Testing and uses X-rays or gamma rays to inspect the internal structure of a material.

• UT stands for Ultrasonic Testing and uses high-frequency sound waves to detect flaws or defects in a material.

• Magnetic particle testing uses magnetic fields and iron particles to detect surface and slightly subsurface defec...read more
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What IS API 5L

What is ASME B 16.5

What is ASME IX

Whatbis ASME B 31.4

Discussion on "Thermal Expension"

Q1. Question on BME and Stress Strain Diagram
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Q2. Iron Carbon Diagram
Ans. 
Iron Carbon Diagram is a graphical representation of the phases of iron and carbon at different temperatures.
• Shows the phases of iron and carbon at different temperatures

• Helps in understanding the microstructure of steel

• Consists of regions like austenite, ferrite, cementite, and pearlite
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Q1. What is yield strength and ultimate strength
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Yield strength is the stress at which a material begins to deform plastically, while ultimate strength is the maximum stress a material can withstand before breaking.
• Yield strength is the point where a material starts to deform plastically, meaning it will not return to its original shape once the stress is removed.

• Ultimate strength is the maximum stress a material can withstand before it breaks or fractures.

• Yield stre...read more
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Q2. All FEA related questions
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Q3. All basic SOM and SHEET METAL RELATED QUESTIONS
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Q1. Asked questions related to Thermodynamics, Power plant and subject of choice
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