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

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

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.

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.

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.

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.

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)

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

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

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.

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 )

Below is summary why lack of penetration:

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.

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!

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 )

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)

Arc voltage is more than effect.

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.

Pls see next part!!!

Thanks!!!