CWB WELDING INSPECTOR LEVEL III STUDY GUIDE EXAM QUESTIONS AND
VERIFIED ANSWERS (2026/2027) 100% SUCCESS
When welding on a thick plate the cooling rate is proportional to the:
(a) heat input.
(b) inverse of the heat input.
(c) inverse of the square of the heat input. - Correct Answer -(b)
From Figure 11.10(Module 20-2014, page 54), estimate the cooling rate for a submerged arc bead on a 19
mm plate (no preheat) with an energy input of 1.77 kJ/in. - Correct Answer -16°C/s at 540°C
Which of the following metals is likely to need the greatest degree of shielding from the atmosphere
during welding?
(a) copper
(b) lead
(c) titanium
(d) steel
(e) gold - Correct Answer -(c)
In an electroslag flux the current is carried mainly by:
(a) neutral oxides.
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, (b) holes.
(c) mobile ions.
(d) thermionic electrons.
(e) free electrons. - Correct Answer -(c)
Compared with pure tungsten, a thoriated tungsten electrode is expected to:
(a) get hotter more quickly.
(b) absorb more electrons.
(c) have a shorten life.
(d) operate at a lower temperature for the same current.
(e) emit more ions. - Correct Answer -(d)
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
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VERIFIED ANSWERS (2026/2027) 100% SUCCESS
When welding on a thick plate the cooling rate is proportional to the:
(a) heat input.
(b) inverse of the heat input.
(c) inverse of the square of the heat input. - Correct Answer -(b)
From Figure 11.10(Module 20-2014, page 54), estimate the cooling rate for a submerged arc bead on a 19
mm plate (no preheat) with an energy input of 1.77 kJ/in. - Correct Answer -16°C/s at 540°C
Which of the following metals is likely to need the greatest degree of shielding from the atmosphere
during welding?
(a) copper
(b) lead
(c) titanium
(d) steel
(e) gold - Correct Answer -(c)
In an electroslag flux the current is carried mainly by:
(a) neutral oxides.
1|Page
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, (b) holes.
(c) mobile ions.
(d) thermionic electrons.
(e) free electrons. - Correct Answer -(c)
Compared with pure tungsten, a thoriated tungsten electrode is expected to:
(a) get hotter more quickly.
(b) absorb more electrons.
(c) have a shorten life.
(d) operate at a lower temperature for the same current.
(e) emit more ions. - Correct Answer -(d)
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
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