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In gas welding, the amount of heat applied to the material being welded is controlled by the -
(answer)size of the tip opening.
Which statement is true in regard to welding heat-treated magnesium? - (answer)The welded
section does not have the strength of the original metal.
Why is it necessary to use flux in all silver soldering operations? - (answer)To chemically clean
the base metal of oxide film.
Annealing of aluminum - (answer)removes stresses caused by forming
Acetylene at a line pressure above 15 PSI is - (answer)dangerously unstable.
The most important consideration(s) when selecting welding rod is - (answer)material
compatibility.
, Why should a carburizing flame be avoided when welding steel? - (answer)It hardens the
surface.
The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist
of - (answer)helium or argon, or a mixture of helium and argon.
Which statement concerning a welding process is true - (answer)The inert-arc welding process
uses an inert gas to protect the weld zone from the atmosphere.
Oxides form very rapidly when alloys or metals are hot. It is important, therefore, when welding
aluminum to use a - (answer)Flux
Edge notching is generally recommended in butt welding above a certain thickness of aluminum
because it - (answer)aids in getting full penetration of the metal and prevents local distortion.
Engine mount members should preferably be repaired by using a - (answer)larger diameter tube
with fishmouth and rosette welds
Cylinders used to transport and store acetylene - (answer)contain acetone.