Home / Blog / Piping Design Engineer Interview Questions Part-7 (Valves-I)

Piping Design Engineer Interview Questions Part-7 (Valves-I)

Piping Design Engineer Interview Questions

1. What are the steps in selection of valve?
What to handle, liquid, gas or powder, fluid nature, function, construction material, disc type, stem type, how to operate, bonnet type, body ends, delivery time, cost, warranty.

2. What are functions of valves?
Isolation, regulation, non-return and special purposes.

3. What are isolating valves?
Gate, ball, plug, piston, diaphragm, butterfly, pinch.

4. What are regulation valves?
Globe, needle, butterfly, diaphragm, piston, pinch.

5. What are non-return valves?
Check valve.

6. What are special valves?
Multi-port, flush bottom, float, foot, pressure relief, breather.

7. What materials are used for construction of valves?
Cast iron, bronze, gun metal, carbon steel, stainless steel, alloy carbon steel, polypropylene and other plastics, special alloys.

8. What is trim?
Trim is composed of stem, seat surfaces, back seat bushing and other small internal parts that normally contact the surface fluid.

9. Which standard specifies trim numbers for valve?
API 600

10. What are wetted parts of valve?
All parts that come in contact with surface fluid are called wetted parts.

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