CWB Level 2 Closed Book Exam questions with accurate ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
solutions
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To measure the strength of a welded joint what mechanical test would you prescribe?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) A transverse weld tension test.
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b) A charpy test.
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c) A CTOD test.
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d) An all weld metal tension test.
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e) A side bend test. - correct answer✔✔a) A transverse weld tension test.
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Select the cutting process that would provide the narrowest heat affected zone when cutting
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
12.5 mm (0.5 in) thick carbon steel.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) Oxy-acetylene cutting.
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b) Air-carbon arc cutting.
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c) Oxy-propane cutting.
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d) Plasma arc cutting.
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e) Laser beam cutting - correct answer✔✔e) Laser beam cutting
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Which of the following refers to a welder test where a pipe assembly is placed vertically and
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the joint welded in the horizontal position without rotating the assembly?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 1G ||\\//|| ||\\//||
b) 2G ||\\//|| ||\\//||
, c) 3G ||\\//|| ||\\//||
d) 5G ||\\//|| ||\\//||
e) 6G - correct answer✔✔b) 2G
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Which of the following imperfections is normally considered as unacceptable regardless of
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
size or location? ||\\//|| ||\\//||
a) Porosity.||\\//|| ||\\//||
b) Crack. ||\\//||
c) Inadequate penetration.
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d) Lamination.||\\//||
e) Burn-through. - correct answer✔✔b) Crack.
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Select the correct penetrameter thickness for 2% sensitivity when radiographing a weldment
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1.25 inches in thickness.
||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 0.012 in.||\\//|| ||\\//|| ||\\//||
b) 0.015 in. ||\\//|| ||\\//|| ||\\//||
c) 0.025 in.
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d) 0.030 in. - correct answer✔✔c) 0.025 in.
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Which of the following statements concerning porosity is true? ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) Porosity cannot be trapped within a weld.
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b) Porosity moves up through later passes and will show only in a final pass.
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c) Porosity is restricted to the centre line of a weld.
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solutions
||\\//||
To measure the strength of a welded joint what mechanical test would you prescribe?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) A transverse weld tension test.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) A charpy test.
||\\//|| ||\\//|| ||\\//||
c) A CTOD test.
||\\//|| ||\\//|| ||\\//||
d) An all weld metal tension test.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
e) A side bend test. - correct answer✔✔a) A transverse weld tension test.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Select the cutting process that would provide the narrowest heat affected zone when cutting
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
12.5 mm (0.5 in) thick carbon steel.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) Oxy-acetylene cutting.
||\\//|| ||\\//|| ||\\//||
b) Air-carbon arc cutting.
||\\//|| ||\\//|| ||\\//|| ||\\//||
c) Oxy-propane cutting.
||\\//|| ||\\//|| ||\\//||
d) Plasma arc cutting.
||\\//|| ||\\//|| ||\\//||
e) Laser beam cutting - correct answer✔✔e) Laser beam cutting
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following refers to a welder test where a pipe assembly is placed vertically and
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the joint welded in the horizontal position without rotating the assembly?
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 1G ||\\//|| ||\\//||
b) 2G ||\\//|| ||\\//||
, c) 3G ||\\//|| ||\\//||
d) 5G ||\\//|| ||\\//||
e) 6G - correct answer✔✔b) 2G
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Which of the following imperfections is normally considered as unacceptable regardless of
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
size or location? ||\\//|| ||\\//||
a) Porosity.||\\//|| ||\\//||
b) Crack. ||\\//||
c) Inadequate penetration.
||\\//|| ||\\//||
d) Lamination.||\\//||
e) Burn-through. - correct answer✔✔b) Crack.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Select the correct penetrameter thickness for 2% sensitivity when radiographing a weldment
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
1.25 inches in thickness.
||\\//|| ||\\//|| ||\\//|| ||\\//||
a) 0.012 in.||\\//|| ||\\//|| ||\\//||
b) 0.015 in. ||\\//|| ||\\//|| ||\\//||
c) 0.025 in.
||\\//|| ||\\//|| ||\\//||
d) 0.030 in. - correct answer✔✔c) 0.025 in.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Which of the following statements concerning porosity is true? ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
a) Porosity cannot be trapped within a weld.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b) Porosity moves up through later passes and will show only in a final pass.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
c) Porosity is restricted to the centre line of a weld.
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