CSWIP 3.1: Question with Answer and Explanation – Part 19

CSWIP 3.1 QUESTION AND ANSWER SERIES

CSWIP 3.1: Question with Answer and Explanation – Part 1

CSWIP 3.1: Question with Answer and Explanation – Part 2

CSWIP 3.1: Question with Answer and Explanation – Part 3

CSWIP 3.1: Question with Answer and Explanation – Part 4

CSWIP 3.1: Question with Answer and Explanation – Part 5

CSWIP 3.1: Question with Answer and Explanation – Part 6

CSWIP 3.1: Question with Answer and Explanation – Part 7

CSWIP 3.1: Question with Answer and Explanation – Part 8

CSWIP 3.1: Question with Answer and Explanation – Part 9

CSWIP 3.1: Question with Answer and Explanation – Part 10

CSWIP 3.1: Question with Answer and Explanation – Part 11

CSWIP 3.1: Question with Answer and Explanation – Part 12

CSWIP 3.1: Question with Answer and Explanation – Part 13

CSWIP 3.1: Question with Answer and Explanation – Part 14

CSWIP 3.1: Question with Answer and Explanation – Part 15

CSWIP 3.1: Question with Answer and Explanation – Part 16

CSWIP 3.1: Question with Answer and Explanation – Part 17

CSWIP 3.1: Question with Answer and Explanation – Part 18

CSWIP 3.1: Question with Answer and Explanation – Part 19

CSWIP 3.1: Question with Answer and Explanation – Part 20

1) One of the following alloys is non-magnetic. Which?

  • 4% Chromium Molybdenum
  • 12% Chromium
  • Austenitic Stainless Steel  (answer)
  • 9% Nickle Steel

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2) When TIG welding Austenitic Stainless Steel pipe, Argon gas baking is called for. This is to:

  • Prevent oxidation ( answer )
  • Prevent under bead cracking
  • Prevent porosity
  • Control the penetration bead shape

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3) The principal purpose of a welder qualification test is to:

  • Test the skill of the welder. ( answer )
  • Assess the weldability of the materials.
  • Decide which NDT methods to use.
  • Give the welder practice before doing production welding.

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4) A fabrication procedure calls for the toes of all welds to be blended in by grinding. The reason for doing this is to:

  • Make the weld suitable for liquid (dye) penetrant inspection.
  • Improve the fatigue life. (answer)
  • Reduce residual stresses.
  • Improve the general appearance of the welds.

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5) For full penetration single-sided butt joints, root bead penetration and profile are mainly influenced by:

  • Root face.
  • Bevel angle.
  • Root gap. ( answer )
  • Included angle.

Pls take note the “profile” in question.

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6) Which of the following would be cause for rejection by most fabrication standards when inspecting fillet welds with undercut, a small amount of:

  • Depth
  • Length
  • Width
  • Sharpeness  (answer)

The size effect is reflected by the loss of cross-sectional area which is insignficantwhen compare to the shape effect.

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7) When visually inspecting the root bead of the single V-butt weld it should be checked for:

  • Lack of root penetration. ( answer )
  • HAZ hardness.
  • Tungsten inclusions.
  • Slag

Because this is “visual inspection”. So we can’t check hardness / internal slag / tungsten insclucions.

8) The strength of a fillet weld is determined by:

  • Leg length.
  • Weld profile.
  • Weld width.
  • Throat thickness. (answer)

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9) The European Standard for NDE of fusion welds by visual examination is:

  • EN 288.
  • EN 499.
  • EN 287.
  • EN 970. ( answer )

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10) Visual inspection of a fabricated item for a high integrity application should cover inspection activities:

  • Before, during and after welding.  ( answer )
  • Before welding only.
  • After welding only.
  • During and after welding only.

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11) Incomplete root penetration in a single V butt joint may be caused by:

  • Excessive root face.
  • Excessive root gap.
  • The current setting being too low.
  • Both a and c. ( answer )

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9

Below is summary why lack of penetration:

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Current: The current used will be determined by the choice of electrode, electrode diameter and material type and thickness. Current has the most effect on penetration.

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12) Incomplete root fusion in a single V butt weld may be caused by:

  • Linear misalignment. (answer)
  • Root gap being too large.
  • Root faces being too small.
  • Welding current too high.

Refer above question!

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13) When visually inspecting the face of a finished weld which of the following flaws would be considered to be the most serious:

  • Excess weld metal height.
  • Start porosity.
  • Spatter
  • Arc strikes. ( answer )

16.PNG

Arc strikes: easy lead to crack due to cooling down too fast.

14) A burn-through may occur if the:

  • Current is too low.
  • Root face is too large.
  • Root gap is too large.
  • Arc voltage is too high.  (answer)

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Arc voltage is more than effect.

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15) A Code of Pratice is a:

  • Standard of workmanship quality only.
  • Set of rules for manufacturing a specific product.  (answer)
  • Specification for the finished product.
  • Code for the qualification of the welding procedures and welders qualifications.

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Pls see next part!!!

Thanks!!!

2 thoughts on “CSWIP 3.1: Question with Answer and Explanation – Part 19

  1. In regards to Question 14, as per sketch and explanations, the correct answer is 3 NOT 4.
    Burn-Through may occur if
    Root Gap is too large.

    Regards,

    Like

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