CWB WELDING INSPECTOR LEVEL 3 EXAM
NEWEST ACTUAL EXAM COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS
Terms in this set (46)
Which of the following metals has (c)
the highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum
The Ellingham diagram (b)
(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.
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.
, Electricity can be conducted by: (b)
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
Which of the following elements is (b)
often present in submerged arc
fluxes to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten
Thoria is added to tunsten To increase thermionic emission by lowering the
electrodes for what purpose? work function.
True or False? False. Metals generally have one of three basic
All pure metals have the same structures.
crystal structure.
Which crystal structure(s) is (are) FCC and HCP
composed of close-packed planes?
NEWEST ACTUAL EXAM COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS
Terms in this set (46)
Which of the following metals has (c)
the highest thermal conductivity?
(a) carbon steel
(b) stainless steel
(c) aluminum
The Ellingham diagram (b)
(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.
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.
, Electricity can be conducted by: (b)
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
Which of the following elements is (b)
often present in submerged arc
fluxes to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten
Thoria is added to tunsten To increase thermionic emission by lowering the
electrodes for what purpose? work function.
True or False? False. Metals generally have one of three basic
All pure metals have the same structures.
crystal structure.
Which crystal structure(s) is (are) FCC and HCP
composed of close-packed planes?
