CSWIP 3.1 Part 2

39 Questions  I  By Emad_rio
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 CSWIP 3.1 part 2
Multi choice question -welding inspector ,steel
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  • 1. 
    Degreasing components are essential for quality welding. When welded some agent may:
    • A. 

      Cause corrosion problems

    • B. 

      Leave residues

    • C. 

      Give off toxic gases

    • D. 

      All of the above.


  • 2. 
    Cellulose electrodes are often used for the deposition of a root pass on pipes welded in the field. This is because?
    • A. 

      Hydrogen control is required

    • B. 

      The high deposition rate due to the iron powder content

    • C. 

      The hydrogen gas produced in the flux increases the arc voltage

    • D. 

      All of the above


  • 3. 
    In the welded austenitic stainless steel .the electrode and the plate materials are often specified to be low carbon content .the reason for this is:
    • A. 

      To prevent formation of crack in the HAZ

    • B. 

      To prevent formation of chromium carbides

    • C. 

      To prevent cracking in the weld

    • D. 

      Minimize distortion


  • 4. 
    With regards to welding procedure, an essential variable may:
    • A. 

      Change the properties of the weld

    • B. 

      Influence the visual acceptance

    • C. 

      Require re-approval of a weld procedure

    • D. 

      All of the above


  • 5. 
    Which of the following NDT methods can only detect surface breaking defects?
    • A. 

      MPI

    • B. 

      DPI

    • C. 

      UT

    • D. 

      RT

    • E. 

      Both a and b


  • 6. 
    Which of following defects would show up as light  indications on a radiograph?
    • A. 

      Slag inclusion and copper inclusion

    • B. 

      Tungsten inclusions and excessive root penetration

    • C. 

      Cap undercut and root piping

    • D. 

      Excessive cap height and incomplete root penetration


  • 7. 
    Which of following additions may be added to an electrodes flux to act as a stabilizer?
    • A. 

      Sodium silicate

    • B. 

      Silicon

    • C. 

      Manganese

    • D. 

      Titanium dioxide.


  • 8. 
    Lamellar tearing is best prevented by:
    • A. 

      The use of plate materials containing low level of impurities

    • B. 

      The use of buttering runs

    • C. 

      Post welds stress relief

    • D. 

      Both A and B


  • 9. 
    When considering radiography using X-ray, which of the following techniques is most likely to be used for pipe-to-pipe weld (circumferential seam), 610mm diameter with no internal access?
    • A. 

      SWSI

    • B. 

      DWSI

    • C. 

      DWDI

    • D. 

      SWSI-panoramic


  • 10. 
    A balanced welding technique for example back step welding is most often used for:
    • A. 

      Controlling lamellar tearing

    • B. 

      Increasing weld toughness

    • C. 

      Reducing weld zone hardness

    • D. 

      Reducing distortion


  • 11. 
    Basic coated electrodes have which of following properties.
    • A. 

      High mechanical properties may be used to produce welds of high deposition rates and to produce welds of low hydrogen content

    • B. 

      Friable slag, high mechanical strength, and to produce welds of a low hydrogen content

    • C. 

      Low hydrogen content welds, good stop/start properties and strength

    • D. 

      Low carbon content welds, friable slag and high strength


  • 12. 
    On a radiograph, the most likely appearance of lack of root fusion on single – V butt weld is:
    • A. 

      A dark straight line with a light root

    • B. 

      A dark root with straight edges

    • C. 

      A dark uneven line following the edge of the root

    • D. 

      None of the above lack of root fusion can not be seen on a radiograph


  • 13. 
    Which of the following applies to heat treatment process of tempering:
    • A. 

      It is always carried out at a temperature above upper critical limit

    • B. 

      It is carried out to increase the strength and toughness of weldments

    • C. 

      Tempering is generally carried out before quench hardening

    • D. 

      None of the above


  • 14. 
    Which of the following is applicable to a plate lamination:
    • A. 

      They are best detected by radiography

    • B. 

      They are mainly caused by hydrogen entrapment

    • C. 

      They originate in the parent material

    • D. 

      They are caused when welding stresses act parallel with the rolled direction of the parent plate


  • 15. 
    Which of the following NDT method would be the least effective on an austenitic stainless steel butt weld?
    • A. 

      UT

    • B. 

      RT

    • C. 

      DPI

    • D. 

      MPI


  • 16. 
    The hardest part of a multi-pass welded joint, assuming no post weld heat treatment has have taken place is:
    • A. 

      The HAZ of the cap

    • B. 

      The HAZ of the root

    • C. 

      The root

    • D. 

      The cap


  • 17. 
    Is it permissible to allow a multi-pass butt weld to cool down between weld passes?
    • A. 

      It should be up to the welding inspector

    • B. 

      No the weld must be kept hot at all times

    • C. 

      It depends on the welder

    • D. 

      It depends on the specification requirements


  • 18. 
    The usual method of assessing the sensitivity and density of a radiograph is means of:
    • A. 

      Densitometer and dosimeter

    • B. 

      Penetrometer and a densitometer

    • C. 

      IQI and a dosimeter

    • D. 

      IQI and a fluxmeter


  • 19. 
    In the submerged arc welding process, the use of excessive high voltages would result in?
    • A. 

      Insufficient flux melting

    • B. 

      Excessive flux melting

    • C. 

      Slag removal difficulties

    • D. 

      Excessive spatter


  • 20. 
    Welding a steel plate with a CE of 0.45 would require prehearing to ?
    • A. 

      Prevent the formation of sulphides

    • B. 

      Prevent hardening in the HAZ

    • C. 

      Prevent the formation of carbides

    • D. 

      To reduce the amount of current required


  • 21. 
    Which of the following process used resistive heating system to achieve weld metal deposition?
    • A. 

      MMA

    • B. 

      Resistant spot welding

    • C. 

      Electrode slag

    • D. 

      Friction welding


  • 22. 
    What does the 70 represent on an E70 10 AWS 5.1 classified electrode?
    • A. 

      70 N/mm 2 minimume UTS

    • B. 

      70 joules minimum impact strength

    • C. 

      70.000 P.S.I minimum yield strength

    • D. 

      70.000 PSI minimum UTS


  • 23. 
    Hot cracking in the steel weldments occurs:
    • A. 

      Along the fusion line.

    • B. 

      In the last metal to solidify

    • C. 

      Weld centerline.

    • D. 

      In areas of the lowest dilution


  • 24. 
    Cellulose electrodes have which of the following properties?
    • A. 

      Viscous slag. Large volumes of shielding gas and UTS values above 90.000 PSI

    • B. 

      Large volumes of shielding gas, high spatter contents and hydrogen levels < 15 mi per 100g of the weld metal deposited

    • C. 

      Large volumes of shielding gas, hydrogen contents >15mi per 100g of weld metal deposited and should be never baked

    • D. 

      High spatter contents, high deposition and large volumes of gas shield


  • 25. 
    From the following electrode coding in BS 499, E50 3 1Ni B 2 1 H5, What does the 3 represent?
    • A. 

      A minimum charpy value of a 30 joules

    • B. 

      A minimum impact value of a 47 joules

    • C. 

      A minimum impact temperature of -30 °c at given joule value

    • D. 

      None of the above


  • 26. 
    Which of fallowing applicable to efficiency?
    • A. 

      The mass of metal deposited as a percentage of the mass of core wire melted

    • B. 

      Iron powder electrodes have efficiencies above 100%

    • C. 

      Electrodes have efficiencies tend to produce welds of a smooth flat profile

    • D. 

      All of above


  • 27. 
    A fatigue cracks fracture surface is:
    • A. 

      Rough randomly torn

    • B. 

      Smooth

    • C. 

      Step like appearance

    • D. 

      Bright crystalline


  • 28. 
    E6013 electrode would most probably used for welding:
    • A. 

      Low-pressure pipework

    • B. 

      High-pressure pipework

    • C. 

      Vertical down welding on storage tanks

    • D. 

      In a situation where low hydrogen welds are specified


  • 29. 
    Which element in steel if present in significant amounts may lead to hot shortness?
    • A. 

      Phosphorus

    • B. 

      Manganese

    • C. 

      Silicon

    • D. 

      Sulphur


  • 30. 
    Which of the following welding processes are commonly used for the Aluminum.
    • A. 

      MIG and TIG

    • B. 

      MAG and TIG

    • C. 

      MMA and TIG

    • D. 

      MMA and MIG

    • E. 

      Both A and B


  • 31. 
    Which of the following materials would be the most difficult material to carry out UT.
    • A. 

      Fine grained material such as micro alloyed

    • B. 

      A large coarse-grained casting

    • C. 

      Duplex stainless steel .45% maximum ferrite content

    • D. 

      Pipe grade material such as API 5L X65

    • E. 

      Bothe B and C


  • 32. 
    Lamellar tearing is must likely to occur in which of the following conditions.
    • A. 

      Single V butt weld made in tubular steel with low through thickness ductility

    • B. 

      Full penetration fabrication Tee butt joint in steel with low through thickness ductility

    • C. 

      Full penetration fabrication cruciform, Z classified material

    • D. 

      All SAW welded joints are susceptible

    • E. 

      Both B and C


  • 33. 
    Radiography is most suited to the detection of:
    • A. 

      Volumetric flaws

    • B. 

      All planar flaws

    • C. 

      Both A and B

    • D. 

      Laminations in rolled plate materials


  • 34. 
     A good example of volumetric flaws:
    • A. 

      Slag inclusion

    • B. 

      Root piping

    • C. 

      Blow holes

    • D. 

      All of the above


  • 35. 
    Which of following isotopes may be used foe a 25mm thick steel pipe to pipe weld DWSI (in according with EN 1435).
    • A. 

      Ir 192

    • B. 

      Co 60

    • C. 

      Se 75

    • D. 

      Yb 169

    • E. 

      Both A and c


  • 36. 
    Increasing carbon content of a steel will:
    • A. 

      Increase the hardness and toughness

    • B. 

      Decrease the hardness and toughness

    • C. 

      Increase hardness, Decrease toughness

    • D. 

      Decrease hardness, Increase toughness


  • 37. 
    Which of following can be used to reduce the chances of solidification cracking.
    • A. 

      The use of a non-fluxed welding process and better quality materials

    • B. 

      The use of better quality materials and the highest heat input process

    • C. 

      The use of a low dilution process and wider joint preparation

    • D. 

      The addition over 1.8% Mn and a low hydrogen welding process

    • E. 

      All of the above


  • 38. 
    Which phase transform to martensite upon rapid cooling?
    • A. 

      Ferrite

    • B. 

      Austenite

    • C. 

      Perlite

    • D. 

      Cementite


  • 39. 
    Which of following is the most likely to be considered an essential variable for a welder qualification test?
    • A. 

      A change from an electrode classified to BS EN 499 as an E46 INI B to an electrode classified AWS A5.1 as an E7018

    • B. 

      A change of pipe wall thickness by at least 15 mm

    • C. 

      A change in pre-heat temperature from 50c to 100c

    • D. 

      All of the above.


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