CWB WELDING INSPECTOR LEVEL 3 EXAM NEWEST ACTUAL EXAM COMPLET
200 QUESTIONS AND CORRECT DETAILED ANSWERS
Study online at https://quizlet.com/_izsd2h
1. Which of the following metals has the (c)
highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum
2. The Ellingham diagram (b)
(a) is a plot of thermal conductivity against
temperature,
(b) shows the free energy of oxide forma-
tion against temperature.
(c) shows the rate of oxidation of metals
against temperature.
3. True or False? True
A metal with a high negative free energy
of oxide formation will generally require
greater shielding from the atmosphere
during welding.
4. Electricity can be conducted by: (b)
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
5. Which of the following elements is often (b)
present in submerged arc fluxes to im-
prove arc stability?
(a) copper
(b) potassium
, CWB WELDING INSPECTOR LEVEL 3 EXAM NEWEST ACTUAL EXAM COMPLET
200 QUESTIONS AND CORRECT DETAILED ANSWERS
Study online at https://quizlet.com/_izsd2h
(c) nickel
(d) tungsten
6. Thoria is added to tunsten electrodes for To increase thermionic emission by lowering
what purpose? the work function.
7. True or False? False. Metals generally have one of three ba-
All pure metals have the same crystal sic structures.
structure.
8. Which crystal structure(s) is (are) com- FCC and HCP
posed of close-packed planes?
9. The real strength of metals is lower than (c)
the theoretical value because:
(a) real crystals always fracture along spe-
cific crystal planes.
(b) grain boundary sliding occurs.
(c) the presence of dislocations facilitates
slip.
10. Multiplication and subsequent conges- (b)
tion of moving dislocations causes:
(a) elastic extension.
(b) work or strain hardening.
(c) a drop in the yield stress.
11. Which of the following elements are most (c)
likely to form interstitial solid solutions?
(a) copper
(b) nickel
(c) carbon
200 QUESTIONS AND CORRECT DETAILED ANSWERS
Study online at https://quizlet.com/_izsd2h
1. Which of the following metals has the (c)
highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum
2. The Ellingham diagram (b)
(a) is a plot of thermal conductivity against
temperature,
(b) shows the free energy of oxide forma-
tion against temperature.
(c) shows the rate of oxidation of metals
against temperature.
3. True or False? True
A metal with a high negative free energy
of oxide formation will generally require
greater shielding from the atmosphere
during welding.
4. Electricity can be conducted by: (b)
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
5. Which of the following elements is often (b)
present in submerged arc fluxes to im-
prove arc stability?
(a) copper
(b) potassium
, CWB WELDING INSPECTOR LEVEL 3 EXAM NEWEST ACTUAL EXAM COMPLET
200 QUESTIONS AND CORRECT DETAILED ANSWERS
Study online at https://quizlet.com/_izsd2h
(c) nickel
(d) tungsten
6. Thoria is added to tunsten electrodes for To increase thermionic emission by lowering
what purpose? the work function.
7. True or False? False. Metals generally have one of three ba-
All pure metals have the same crystal sic structures.
structure.
8. Which crystal structure(s) is (are) com- FCC and HCP
posed of close-packed planes?
9. The real strength of metals is lower than (c)
the theoretical value because:
(a) real crystals always fracture along spe-
cific crystal planes.
(b) grain boundary sliding occurs.
(c) the presence of dislocations facilitates
slip.
10. Multiplication and subsequent conges- (b)
tion of moving dislocations causes:
(a) elastic extension.
(b) work or strain hardening.
(c) a drop in the yield stress.
11. Which of the following elements are most (c)
likely to form interstitial solid solutions?
(a) copper
(b) nickel
(c) carbon
