CSWIP 3.1 Multiple Choice Questions - Paper 3

30 Questions | Total Attempts: 19016

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CSWIP Quizzes & Trivia

Questions and Answers
  • 1. 
    Which type of submerged arc welding flux is susceptible to moisture pick-up?
    • A. 

      Neutral

    • B. 

      Agglomerated

    • C. 

      Fused

    • D. 

      Are all about the same

  • 2. 
    A Large grain size in the HAZ of a C-Mn Steel weld joint may have:
    • A. 

      Low ductility

    • B. 

      Low toughness

    • C. 

      High toughness

    • D. 

      High tensile strength

  • 3. 
    A STRA test is used to measure the:
    • A. 

      Tensile strength of the welded joint

    • B. 

      Level of residual stress in butt joints

    • C. 

      Fracture toughness of the HAZ

    • D. 

      Through-thickness ductility of a steel plate (the Z direction)

  • 4. 
    The risk of hydrogen cracking is greater when MMA welding:
    • A. 

      C-Mn Steels

    • B. 

      Austenitic Stainless Steels

    • C. 

      Low Alloy Steels For Elevated Temperature Service

    • D. 

      Low Carbon Steels For Cryogenical Service

  • 5. 
    The property of a material which has the greatest influence on welding distortion is its
    • A. 

      Yield strength

    • B. 

      Coefficient of thermal expansion

    • C. 

      Elastic modulus

    • D. 

      Coefficient of thermal conductivity

  • 6. 
    Which of the following is a suitable shielding gas for FCAW of stainless steels?
    • A. 

      100% Argon

    • B. 

      70% Argon + 30% He

    • C. 

      Argon + 5% Hydrogen

    • D. 

      Argon + 20% CO2

  • 7. 
    The presence of iron sulphides in a weld bead may cause:
    • A. 

      Solidification cracking

    • B. 

      Hydrogen cracking

    • C. 

      Lamellar tearing

    • D. 

      Weld decay

  • 8. 
    A macrosection is particularly good for showing:
    • A. 

      The weld metal HAZ microstructure

    • B. 

      Overlap

    • C. 

      Joint hardness

    • D. 

      Spatter

  • 9. 
    Which of the following procedures would be expected to produce the least distortion in a 15mm straight butt weld?
    • A. 

      TIG weld, single-sided, multi-pass

    • B. 

      MMA weld, single-sided, multi-pass

    • C. 

      MMA weld, double-sided, multi-pass

    • D. 

      SAW weld, 1 pass per side

  • 10. 
    A suitable gas/gas mixture, for GMAW for aluminium is:
    • A. 

      100% CO2

    • B. 

      100% Argon

    • C. 

      80% Argon + 20% CO2

    • D. 

      98% Argon + 2% 02

  • 11. 
    Which of the following is associated with SAW more often than it is with MMA welds?
    • A. 

      Hydrogen cracking in the HAZ

    • B. 

      Solidification cracking in the weld metal

    • C. 

      Reheat cracking during PWHT

    • D. 

      Lamellar tearing

  • 12. 
    EN ISO 5817 (Level C) specifies that the limit for the diameter (D) of a single pore in a weld is: D<0.3s, but max. 4mm where s=material thickness. For which of the following situations is the pore acceptable?
    • A. 

      S=20mm, measured pore diameter = 5mm

    • B. 

      S=15mm, measured pore diameter = 4.5mm

    • C. 

      S=10mm, measured pore diameter = 3mm

    • D. 

      S=10mm, measured pore diameter = 3.5mm

  • 13. 
    To measure arc voltage accurately it is recommended that the voltmeter should be connected:
    • A. 

      Across the arc and as near as practical to the arc

    • B. 

      Across the power source terminals prior to arc initiation

    • C. 

      Across the power source terminals during the welding operation

    • D. 

      Anywhere in the circuit

  • 14. 
    Lamellar tearing has occurred in a steel fabrication. What technique could have been used to find it before the weld was made?
    • A. 

      X-ray examination

    • B. 

      Liquid penetrant examination

    • C. 

      Ultrasonic examination

    • D. 

      It could not have been found by any inspection method

  • 15. 
    Preheating a low alloy steel prior to welding to minimise the risk of:
    • A. 

      Porosity

    • B. 

      Excessive distortion

    • C. 

      HAZ cracking

    • D. 

      Lack of fusion

  • 16. 
    Typical temperature used for normalising a C-Mn steel plate are:
    • A. 

      600-650ºC

    • B. 

      1000-1100ºC

    • C. 

      700-800ºC

    • D. 

      880-920ºC

  • 17. 
    For GMAW the burn-off rate of the wire is directly related to:
    • A. 

      Stick-out length

    • B. 

      Wire feed speed

    • C. 

      Arc voltage

    • D. 

      Travel speed

  • 18. 
    For MMA welding of a 60mm wall nozzle to a 100mm wall vessel shell, preheat temperatures should be checked:
    • A. 

      Before welding starts/restarts

    • B. 

      On the shell and nozzle

    • C. 

      At points at least 75mm from the joint edge

    • D. 

      All of the above

  • 19. 
    A crack running along the centreline of a weld bead could be caused by:
    • A. 

      Use of damp flux

    • B. 

      Lack of preheat

    • C. 

      Arc voltage too high

    • D. 

      Weld bead too deep and very narrow

  • 20. 
    To improve resistance to service failure caused by cyclic loading, it is good practice to:
    • A. 

      Use low heat input welding

    • B. 

      Use steel with a low CEV

    • C. 

      Ensure there are no features that give high stress concentration

    • D. 

      PWHT the fabrication

  • 21. 
    The use of low carbon austenitic stainless steels and stabiliser stainless steels will minimise the risk of:
    • A. 

      HAZ cracking

    • B. 

      Weld decay

    • C. 

      Weld metal cracking

    • D. 

      Distortion

  • 22. 
    Which type of SAW flux is susceptible to breaking down into fine particles during circulation?
    • A. 

      Fused

    • B. 

      Neutral

    • C. 

      Alloyed

    • D. 

      Agglomerated

  • 23. 
    The maximum hardness in the HAZ of a steel will increase if the:
    • A. 

      Heat input is increased

    • B. 

      CEV is increased

    • C. 

      Joint thickness is decreased

    • D. 

      Basic electrodes are used

  • 24. 
    BS EN ISO 5817 (Level B) specifies the limit for excess weld metal (h) on a butt weld as: h<1mm+0.1b, but max. 5mm, b= weld width. In which of the following situations is the measured excess weld metal acceptable?
    • A. 

      B = 10 measured excess weld metal = 2.5mm

    • B. 

      B = 20 measured excess weld metal = 3.5mm

    • C. 

      B = 35 measured excess weld metal = 4.5mm

    • D. 

      B = 45 measured excess weld metal = 5.5mm

  • 25. 
    A C-Mn steel is being welded by MMA and the electrode run-out lengths that have been used are much shorter than specified by the WPS. This deviation may give:
    • A. 

      Increased risk of hydrogen cracking

    • B. 

      Increased risk of solidification cracking

    • C. 

      Lower values of HAZ toughness

    • D. 

      Higher values of HAZ hardness

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