CWB WELDING INSPECTOR LEVEL 3 EXAM QUESTIONS
AND ANSWERS ALREADY GRADED A+. 100% VERIFIED
SOLUTIONS | UPDATED PER LATEST CSA W59 & W47.1
STANDARDS | GRADED A+
Which of the following metals has the highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum - -------CORRECT ANSWER----(c)
The Ellingham diagram
(a) is a plot of thermal conductivity against temperature,
(b) shows the free energy of oxide formation against temperature.
(c) shows the rate of oxidation of metals against temperature. - -------
CORRECT ANSWER----(b)
True or False?
A metal with a high negative free energy of oxide formation will
generally require greater shielding from the atmosphere during
welding. - -------CORRECT ANSWER----True
, Electricity can be conducted by:
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions. - -------CORRECT ANSWER----(b)
Which of the following elements is often present in submerged arc
fluxes to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten - -------CORRECT ANSWER----(b)
Thoria is added to tunsten electrodes for what purpose? - -------
CORRECT ANSWER----To increase thermionic emission by lowering the
work function.
True or False?
All pure metals have the same crystal structure. - -------CORRECT
ANSWER----False. Metals generally have one of three basic structures.
Which crystal structure(s) is (are) composed of close-packed planes? - --
-----CORRECT ANSWER----FCC and HCP
AND ANSWERS ALREADY GRADED A+. 100% VERIFIED
SOLUTIONS | UPDATED PER LATEST CSA W59 & W47.1
STANDARDS | GRADED A+
Which of the following metals has the highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum - -------CORRECT ANSWER----(c)
The Ellingham diagram
(a) is a plot of thermal conductivity against temperature,
(b) shows the free energy of oxide formation against temperature.
(c) shows the rate of oxidation of metals against temperature. - -------
CORRECT ANSWER----(b)
True or False?
A metal with a high negative free energy of oxide formation will
generally require greater shielding from the atmosphere during
welding. - -------CORRECT ANSWER----True
, Electricity can be conducted by:
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions. - -------CORRECT ANSWER----(b)
Which of the following elements is often present in submerged arc
fluxes to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten - -------CORRECT ANSWER----(b)
Thoria is added to tunsten electrodes for what purpose? - -------
CORRECT ANSWER----To increase thermionic emission by lowering the
work function.
True or False?
All pure metals have the same crystal structure. - -------CORRECT
ANSWER----False. Metals generally have one of three basic structures.
Which crystal structure(s) is (are) composed of close-packed planes? - --
-----CORRECT ANSWER----FCC and HCP
