Are you in a dilemma to decide your future due to heavy competition? Are you not getting right job in spite of being repeated attempts? Have you got low self-esteem? Then change your mind by checking at wisdom jobs online portal. Piping is a system of pipes used to convey fluids from one location to another. The advantage of piping is that they are easily transported as a compact pile of parts on a wagon and then assembled as a hollow structure at the jobsite. The role of a piping engineer is to design and build piping systems that carry out water, oil and waste. So, trace out your career as piping designer, structural designer, piping engineer, junior mechanical engineer, steam fitter and so on by seeing through the below offered piping job interview questions and answers.
Question 1. What Is Preferred Location For Drain?
Answer :
Must be located at the bottom section of drum.
Question 2. What Are The Steps In Selection Of Valve?
Answer :
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.
Question 3. What Are Functions Of Valves?
Answer :
Isolation, regulation, non-return and special purposes.
Question 4. What Are Isolating Valves?
Answer :
Gate, ball, plug, piston, diaphragm, butterfly, pinch.
Question 5. What Are Regulating Valves?
Answer :
Globe, needle, butterfly, diaphragm, piston, punch.
Question 6. What Are Non-return Valves?
Answer :
check valve.
Question 7. What Are Special Valves?
Answer :
Multi-port, flush bottom, float, foot, pressure relief, breather.
Question 8. What Materials Are Used For Construction Of Valves?
Answer :
Cast iron, bronze, gun metal, carbon steel, stainless steel, alloy carbon steel, polypropylene and other plastics, special alloys.
Answer :
Trim is composed of stem, seat surfaces, back seat bushing and other small internal parts that normally contact the surface fluid.
Question 10. Which Standard Specifies Trim Numbers For Valve?
Answer :
API 600.
Question 11. What Are Wetted Parts Of Valve?
Answer :
All parts that come in contact with surface fluid are called wetted parts.
Question 12. What Is Wire Drawing?
Answer :
This term is used to indicate the premature erosion of the valve seat caused by excessive velocity between seat and seat disc, when valve is not closed tightly.
Question 13. What Is Straight Through Valve?
Answer :
Valve in which the closing operation of valve is achieved by 90 degrees turn of the closing element.
Question 14. What Pressure Tests Are Carried Out On Valves?
Answer :
Shell-hydrostatic, seat-hydrostatic, seat-pneumatic
Question 15. What Are Available Valve Operators?
Answer :
Hand-lever, hand-wheel, chain operator, gear operator etc.
Question 16. What Is The Full Form Of Asme?
Answer :
American Society for Mechanical Engineers.
Answer :
Power Piping: ASME B 31.1
Process Piping: ASME B 31.3
Question 18. What Are The Main Differences Between Asme B 31.1 And Asme B 31.3?
Answer :
The main differences are listed below:
Question 19. How To Calculate The Basic Allowable Stress For A Material?
Answer :
The basic allowable stress is defined in respective code. For example as per B 31.3 the basic allowable stress for a material is the minimum of the following:
Answer :
In Constant Spring hanger the load remains constant throughout its travel range. But In variable spring hanger the load varies with displacement.
Spring hangers are used when thermal displacements are upwards and piping system is lifted off from the support position. Variable spring hanger is preferable as this is less costly.
Constant springs are used:
Question 21. What Do You Mean By Variability? What Is The Industry Approved Limit For Variability?
Answer :
Variability= (Hot Load-Cold load)/Hot load = (Spring Constant × displacement)/Hot load.
Limit for variability for variable spring hangers is 25%.
Question 22. What Are The Major Parameters You Must Address While Making A Spring Data-sheet?
Answer :
Major parameters are: Spring TAG, Cold load/Installed load, Vertical and horizontal movement, Piping design temperature, Piping Material, Insulation thickness, Hydro-test load, Line number etc.
Question 23. How To Calculate The Height Of A Variable Spring Hanger?
Answer :
Answer :
In your system first decide the location where you want to install the spring. Then remove all nearby supports which are not taking load in thermal operating case. Now run the program and the sustained load on that support node is your hot load. The thermal movement in that location is your thermal movement for your spring. Now assume variability for your spring. So calculate
Spring constant = (Hot load × variability)/displacement. Now with spring constant and hot load enter any vendor catalog to select spring inside the travel range.
Question 25. What Is The Software Available For Performing Piping Stress Analysis?
Answer :
Caesar II, Auto Pipe etc.
Piping Related Practice Tests |
|
---|---|
AutoCAD Practice Tests | Mechanical Engineering Practice Tests |
Mechatronics engineering Practice Tests |
All rights reserved © 2020 Wisdom IT Services India Pvt. Ltd
Wisdomjobs.com is one of the best job search sites in India.