CWB Welding Inspector Level III Study Guide
Questions With Correct Detailed Answers
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Terms in this set (46)
Which of the following (c)
metals has 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 (b)
conducted by:
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
Which of the following (b)
elements is often present
in submerged arc fluxes
to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten
Thoria is added to To increase thermionic emission by lowering the
tunsten electrodes for work function.
what purpose?
True or False? False. Metals generally have one of three basic
All pure metals have the structures.
same crystal structure.
Which crystal structure(s) FCC and HCP
is (are) composed of
close-packed planes?
The real strength of (c)
metals is lower than the
theoretical value
because:
(a) real crystals always
fracture along specific
crystal planes.
(b) grain boundary sliding
occurs.
(c) the presence of
dislocations facilitates
slip.
Questions With Correct Detailed Answers
Newest Version
Save
Terms in this set (46)
Which of the following (c)
metals has 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 (b)
conducted by:
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions.
Which of the following (b)
elements is often present
in submerged arc fluxes
to improve arc stability?
(a) copper
(b) potassium
(c) nickel
(d) tungsten
Thoria is added to To increase thermionic emission by lowering the
tunsten electrodes for work function.
what purpose?
True or False? False. Metals generally have one of three basic
All pure metals have the structures.
same crystal structure.
Which crystal structure(s) FCC and HCP
is (are) composed of
close-packed planes?
The real strength of (c)
metals is lower than the
theoretical value
because:
(a) real crystals always
fracture along specific
crystal planes.
(b) grain boundary sliding
occurs.
(c) the presence of
dislocations facilitates
slip.
