CWB Welding Inspector Level III Study Guide
EXAM, QUESTIONS WITH ACCURATE 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 tunsten To increase thermionic emission by lowering the work
electrodes for what function.
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?
EXAM, QUESTIONS WITH ACCURATE ANSWERS |
MULTIPLE CHOICES |!!
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 tunsten To increase thermionic emission by lowering the work
electrodes for what function.
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?
