CWB Welding Inspector Level III Study Guide |
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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 electrodes To increase thermionic emission by lowering
the 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?
The real strength of metals is lower (c)
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.
LATEST UPDATE | INSTANT DOWNLOAD
Save
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 electrodes To increase thermionic emission by lowering
the 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?
The real strength of metals is lower (c)
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.
