Welding Flashcards - Cram.com Welding Processes Quizlet
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In Gas Tungsten Arc (GTA) welding, a stream of inert gas is used to
A - prevent the formation of oxides in the puddle
B - concentrate the heat of the arc and prevent its dissipation
C - lower the temperature required to properly fuse the metal
A - prevent the formation of oxides in the puddle
Which statement best describes magnesium welding?

A - magnesium can be welded to other metals
B - filler rod should be nickel-steel
C - filler rod should be the same composition as base metal
C - filler rod should be the same composition as base metal
Which statement is true in regard to welding heat-treated magnesium?
A - the welded section does not have the strength of the original metal
B - flux should not be used because it is very difficult to remove and is likely to cause corrosion
C - magnesium cannot be repaired by fusion welding because of the high probability of igniting the metal
A - the welded section does not have the strength of the original metal
The oxyacetylene flame for silver soldering should be
A - oxidizing
B - neutral
C - carburizing
Why is it necessary to use flux in all silver soldering operations?
A - to chemically clean the base metal of oxide film
B - to prevent overheating of the base metal
C - to increase heat conductivity
A - to chemically clean the base metal of oxide film
Engine mount members should preferably be repaired by using a
A - larger diameter tube with fishmouth and norosette welds
B - larger diameter tube with fishmouth and rosette welds
C - smaller diameter tube with fishmouth and rosette welds
B - larger diameter tube with fishmouth and rosette welds
What method of repair is recommended for a steel tube longeron dented at a cluster?
A - welded split sleeve
B - welded outer sleeve
C - welded patch plate
Welding over brazed or soldered joints is
A - not permitted
B - permissible for mild steel
C - permissible for most metals or alloys that are not heat treated
Which statement concerning soldering is correct?
A - joints in electric wire to be soldered should be mechanically secure prior to soldering
B - changeable shades of blue can be observed on the surface of a copper soldering tip when the proper temperature for soldering has been reached
C - if the soldering temperature is too high, the solder will form in lumps and not produce a positive bond
A - joints in electric wire to be soldered should be mechanically secure prior to soldering

A resurfaced soldering iron cannot be used effectively until after the working face has been
A - fluxed
B - polished
C - tinned
Which of the following can normally be welded without adversely affecting strength?
1. aircraft bolts
2. SAE 4130 chrome/molybdenum tubing
3. spring steel struts
4. most heat-treated steel/nickel alloy components
A - 2 and 4
B - 1 and 3
C - 2
In selecting a torch tip size to use in welding, the size of the tip opening determines the
A - amount of heat applied to the work
B - temperature of the flame
C - melting point of the filler metal
A - amount of heat applied to the work
Why should a carburizing flame be avoided when welding steel?
A - it removes the carbon content
B - it hardens the surface
C - a cold weld will result
B - it hardens the surface
The most important consideration(s) when selecting welding rod it
A - current setting or flame temperature
B - material compatibility
C - ambient conditions
B - material compatibility
The oxyacetylene flame used for aluminum welding should
A - be neutral and soft
B - be slightly oxidizing
C - contain an excess of acetylene and leave the tip at a relatively low speed
A very thin and pointed tip on a soldering copper is undesirable because it will
A - transfer too much heat to the work
B - have a tendency to overheat and become brittle
C - cool too rapidly
Filing or grinding a weld bead is considered to be
A - an acceptable means to achieve a smoother surface
B - a way to bring about strength reduction in joint
C - frequently necessary to avoid adding excessive weight to a weld joint
B - a way to bring about strength reduction in joint
Acetylene at a line pressure above 15 PSI is
A - dangerously unstable
B - used when a reducing flame is necessary
C - usually necessary when welding metal over 3/8 inch thick
Cylinders used to transport and store acetylene
A - are pressure tested to 3,000 PSI
B - are green in color
C - contain acetone
A welding torch backfire may be caused by
A - a loose tip
B - using too much acetylene
C - a tip temperature that is too cool
Which statement concerning a welding process is true?
A - the inert-arc welding process uses an inert gas to protect the weld zone from the atmosphere
B - in the metallic-arc welding process, filler material, if needed, Is provided by a separate metal rod of the proper material held in the arc
C - in the oxyacetylene welding process, the filler rod used for steel is covered with a thing coating of flux
A - the inert-arc welding process uses an inert gas to protect the weld zone from the atmosphere
Where should the flux be applied when oxyacetylene welding aluminum?
A - painted only on the surface to be welded
B - painted on the surface to be welded and applied to the welding rod
C - applied only to the welding rod
B - painted on the surface to be welded and applied to the welding rod
What purpose does flux serve in welding aluminum?
A - removes dirt, grease, and oil
B - minimizes or prevents oxidation
C - ensures proper distribution of the filler rod
B - minimizes or prevents oxidation
Why are aluminum plates 1/4 inch or more thick usually preheated before welding?
A - reduces internal stresses and assures more complete penetration
B - reduces welding time
C - prevents corrosion and ensures proper distribution of flux
A - reduces internal stresses and assures more complete penetration
How should a welding torch flame be adjusted to weld stainless steel?
A - slightly carburizing
B - slightly oxidizing
C - neutral
Oxides form very rapidly when alloys or metals are hot. It is important, therefore, when welding aluminum to use a
A - solvent
B - filler
C - flux
In gas welding, the amount of heat applied to the material being welded is controlled by the
A - amount of gas pressure used
B - size of the tip opening
C - distance the tip is held from the work
B - size of the tip opening
High pressure cylinders used to transport and store acetylene must
A - be pressure tested to 3,000 PSI
B - be green in color
C - contain acetone
When a butt-welded joint is visually inspected for penetration,
A - the penetration should be 25 to 50 percent of the thickness of the base metal
B - the penetration should be 100 percent of the thickness of the base metal
C - look for evidence of excessive heat in the form of a very high bead
B - the penetration should be 100 percent of the thickness of the base metal
Annealing of aluminum
A - increases the tensile strength
B - makes the material brittle
C - removes stressed caused by forming
C - removes stressed caused by forming
Edge notching is generally recommended in butt welding above a certain thickness of aluminum because it
A - helps hold the metal in alignment during welding
B - aids in the removal or penetration of oxides on the metal surface
C - aids in getting full penetration of the metal and prevents local distortion
C - aids in getting full penetration of the metal and prevents local distortion
If too much acetylene is used in the welding of stainless steel,
A - a porous weld will result
B - the metal will absorb carbon and lose its resistance to corrosion
C - oxide will be formed on the base metal close to the weld
B - the metal will absorb carbon and lose its resistance to corrosion
The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist of
A - a mixture of nitrogen and carbon dioxide
B - nitrogen or hydrogen, or a mixture of nitrogen and hydrogen
C - helium or argon, or a mixture of helium and argon
C - helium or argon, or a mixture of helium and argon
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