CWB WELDING INSPECTOR LEVEL 3 EXAM
NEWEST ACTUAL EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS
Which of the following alloys would you expect to give the highest risk of
hot cracking?
(a) Al-0.1%Cu
(b) Al-3%Cu
(c) Al-8%Cu - Correct Answer - (b)
If centerline solidification cracking is occuring in welding a structural
steel what is a likely cause?
(a) electrical extension too long
(b) arc voltage too high
(c) welding current and speed too high
(d) weld too large - Correct Answer - (c)
What is the most likely cause of porosity in aluminum welds?
(a) hydrogen
(b) nitrogen
(c) argon
, (d) oxygen - Correct Answer - (a)
How can porosity due to nitrogen be controlled in welding nickel? -
Correct Answer - By using filler metal containing titanium.
What is the most likely cause of porosity in carbon steel welds?
(a) hydrogen from reduction of water
(b) nitrogen
(c) carbon monoxide from reaction of oxygen with carbon
(d) oxygen direct from the air
- Correct Answer - (c)
What elements are included in electrodes or fluxes to control porosity in
steel welds?
(a) silicon, aluminum, manganese
(b) copper, nickel, molybdenum
(c) sulphur, phosphorus, selenium
(d) silica, alumina, magnesia
- Correct Answer - (a)
What is thermal conductivity divided by specific heat and specific gravity
known as?
NEWEST ACTUAL EXAM COMPLETE 200
QUESTIONS AND CORRECT DETAILED
ANSWERS
Which of the following alloys would you expect to give the highest risk of
hot cracking?
(a) Al-0.1%Cu
(b) Al-3%Cu
(c) Al-8%Cu - Correct Answer - (b)
If centerline solidification cracking is occuring in welding a structural
steel what is a likely cause?
(a) electrical extension too long
(b) arc voltage too high
(c) welding current and speed too high
(d) weld too large - Correct Answer - (c)
What is the most likely cause of porosity in aluminum welds?
(a) hydrogen
(b) nitrogen
(c) argon
, (d) oxygen - Correct Answer - (a)
How can porosity due to nitrogen be controlled in welding nickel? -
Correct Answer - By using filler metal containing titanium.
What is the most likely cause of porosity in carbon steel welds?
(a) hydrogen from reduction of water
(b) nitrogen
(c) carbon monoxide from reaction of oxygen with carbon
(d) oxygen direct from the air
- Correct Answer - (c)
What elements are included in electrodes or fluxes to control porosity in
steel welds?
(a) silicon, aluminum, manganese
(b) copper, nickel, molybdenum
(c) sulphur, phosphorus, selenium
(d) silica, alumina, magnesia
- Correct Answer - (a)
What is thermal conductivity divided by specific heat and specific gravity
known as?
