TÜV NORD QA QC Engineer Interview Questions and Answers

Q1. What are the different grades of material you have worked on
Ans. 
I have worked with various material grades including metals, plastics, and composites, ensuring quality and compliance.
• Metals: Worked with stainless steel (Grade 304, 316) for corrosion resistance in medical devices.

• Plastics: Experienced with high-density polyethylene (HDPE) for chemical resistance in packaging.

• Composites: Used carbon fiber reinforced polymers for lightweight structural applications in aerospace.

• Concre...read more
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Q2. What is material specification for piping, forgings fittings tubes fasteners for MS materials
Ans. 
Material specifications for piping, forgings, fittings, tubes, and fasteners for MS materials include ASTM standards and specific grades.
• ASTM A53/A53M - Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

• ASTM A105/A105M - Standard Specification for Carbon Steel Forgings for Piping Applications

• ASTM A234/A234M - Standard Specification for Piping Fittings of Wrought Carbon Steel ...read more
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Q3. What is the difference between SS316 and SS304
Ans. SS304 doesn't contain Molybdenum, has chromium slightly higher than SS316 and nickle slight lower than SS316
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Q4. Difference between SS316L and SS316
Ans. 
SS316L has lower carbon content than SS316, making it more corrosion resistant and suitable for welding applications.
• SS316L has lower carbon content (0.03% max) compared to SS316 (0.08% max)

• SS316L is more corrosion resistant due to the lower carbon content

• SS316L is commonly used in welding applications where post-weld annealing is not possible

• SS316 is more commonly used in applications where higher strength is required
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Q5. Where do we refer the remaining chemical composition for SA-516 Gr. 70 plates
Ans. 
Refer to ASME Section II Part A for remaining chemical composition of SA-516 Gr. 70 plates
• Refer to ASME Section II Part A for detailed chemical composition

• Check the material test report (MTR) for specific chemical composition

• Consult with the manufacturer or supplier for any additional information
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