Questionnaire for QA/QC inspectors GENERAL What is quality control? What is welding? What is steel? What is difference between metals and materials? How many types of steels are there mainly? What are the types of alloys? List out any three or four? What is the difference between CS & alloy steel? What is the effect of oils, paints & rust found in the welding area? How you control hydrogen cracking? 10 What is environmental cracking? 11 What is corrosion and erosion? 12 Where you get the preheating requirement? 13 How you ensure it? 14 Where ensure pre heating? 15 What is inter pass temperature? 16 Where get the inter pass temperature requirements? 17 How measure it? 18 What is heat input? 19 How calculate the heat input? 20 Where ensure the heat input? Draw a picture? 21 What is the welding parameter effecting heat input? 22 What is PWHT? 23 What is the difference between stress relieving & PWHT? 24 What is the difference between normalizing & annealing? 25 How many thermocouples are required during PWHT? 26 What are the types of thermo couples? 27 How attach it to the job? 28 Where attach the thermo couples? Explain it? 29 What is the heating bandwidth? 30 How control the chimney effects? 31 What is you action, if you found power failure during PWHT heating cycle? 32 How you ensure the PWHT satisfactory or not? 33 What is the hardness? 34 Where ensure it? 35 What is the weight of hammer to carryout the polide hardness tester?(as per NACE-472) 36 What is your course of action? If you find the diameter of indent are oblong more than 0.1 units during hardness testing 37 How much distance required at least between indentations? 38 What is color-coding? 39 List how many types of flanges available? 40 What are the inspections required for spectacle flanges? 41 What are the inspections required for valves installation? 42 What is minimum wall thickness? How much is it? 43 What is a quality audit? 44 What is the purpose of quality audits? 45 What is code? Page of 46 What is specification? 47 What is standard? 48 How much verticality acceptable during vessel erection? 49 Which code is stringent? (ASME SEC IX or API - 1104) 50 What is gauge plate? 51 What is size of gauge plate? 52 What is length of gauge plate? 53 Why gauge plate is required? 54 Where use the gauge plate? 55 What are the pipefittings? 56 How ensure height of elbow for 20 D X 6―NPS? 57 Do you know 90 deg; four cuts miter bends sizes of sides? 58 What is inert gas? 59 Why backing gas or purging gas is required? 60 How many variables are there to control the welding defects? 61 What is definition of plate/ sheet / strip? 62 Can you explain low hydrogen baking procedure? 63 What is mean for low hydrogen electrode? 64 Why baking is required? 65 What is P&ID? 66 What is isometric drawing? 67 What is difference between ASTM & ASME materials? 68 How calculate the carbon equivalent? 69 What is HAZ? 70 How find the development angle for cone? 71 How many types of dished ends? 72 Which thickness is more in case of hemisphere dished end and shell? 73 What is factor of safety? 74 What is plasticity & elasticity? 75 Can you explain stress and strain diagram? 76 Which inspection is required to identify the SA516 Gr.B & SA 515 Gr.B test unidentified specimens? 77 How many types of weld joints? 78 How measure the strain rate during hydro test? 79 How is microstructure of the duplex stainless steel at room temperature? 80 What cold cracking and hot cracking? 81 How many types of crystal structures? 82 What is IGC? 83 Do you know the bolt tighten sequence? Draw a diagram? 84 Why orifice plate is required? 85 What are the inspections required @ orifice plate inserted? 86 What is good engineering practice for L/S & C/S orientations? 87 What is a lethal substance? 88 How know the requirement of PWHT? 89 How know the requirement of impact test? 90 Do you know how types of valves classifieds? 91 How many types of manually operated valves? 92 What is course of action, while hydro testing found 25 mm stretch at TP and 20 mm at zero pressure? 93 How many types reducers are there? 94 What is the difference between concentric reducer and eccentric reducer? Page of 95 96 97 98 99 How verify that correct piping material? How identify the correct flanges and fittings? How check the correct pipe schedule? What is the tolerance of pipe? What is an expansion loop? ASME SEC.IX What is welding inspector role before welding, during welding & after welding? What are the welding variables? How many types of welding variables? What is difference between essential variables & non-essential variables? What is the supplementary variable? What are the essential variables for QW-353? What are the essential variables for QW-356? What is QW-253? What is QW-256 10 What is “A†number and “F†number? 11 UNS 31254 Super austenitic stainless steel ‘P’ number is 8, what is ‘A’ number? 12 How much misalignment is acceptable? Where you know it? 13 If you have dissimilar thickness, how you accept the misalignment? 14 If you have 3/4―-32― dia piping, how many tests required for welder qualifications? How it is? 15 If I have 36 mm thickness job, my welders are max.qualified 12mm.shall I completed by them? 16 What is heat input? 17 Where you ensure? Draw picture? 18 How we ensure it? 19 Why we need to control/monitor it? 20 What is interpass temperature? 21 Where ensure inter pass temperature? 22 How you ensure inter pass temperature? 23 What is the inspection tools you familiar? 24 How can you check the fit up? Explain? 25 What type of cleaning required within groove & near by groove? How long? 26 What is bridge tacks? 27 Where it is required? 28 How much welding shall be completed before welding interruption? 29 If not what to do? 30 What is your action, if inter pass temperature more 50 c than the specified? Page of 31 What is PQR? 32 What is WPS? 33 What is WPQ? 34 What is QW-484 format? 35 What is QW-482 format? 36 What is QW-483 format? 37 What is mandrill size during bend test? 38 What is the purpose to the bend test? 39 What is Qw-451? 40 What is QW-452? 41 What type of qualification required for > 24― pipe? 42 What is the difference between pipe and tube? 43 What doesn’t mean 2†tube and 2†pipe? 44 Can you list out the pipeline construction codes? 45 How ensure the soundness of welding? 46 How much weaving is acceptable? 47 Why tensile strength test is required? 48 Why bend tests are required? 49 Why fillet break test is required? 50 Why macro test is required? 51 What is difference between macro & micro test? 52 Why notch toughness test is required? 53 How much ovality is acceptable for pipes? 54 One welder is qualified for plate welding with 3G according to AWS D 1.1; shall we allow him to carry the plate welding with 3G of ASME SEC IX? 55 How much area of cleaning is required from the weld groove as a good engineering practice? 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