CR210B ALUMINUM WELDING EXAM
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Both a and b - ANS Technician A says that one of the advantages of using GMA (MIG) welding
for aluminum is that this process can be used on a variety of alloys and thicknesses.Technician B
says that one of the advantages of using GMA (MIG) welding for aluminum is that there is no
high-frequency arc problems.Who is right?
a only - ANS A GMA (MIG) welder used for steel is being converted for use with aluminum.
Technician A says that "U" shaped drive rolls are needed. Technician B says that a different type
of gas flow meter is needed. Who is right?
dedicated for use only with aluminum. - ANS The gun liner for GMA (MIG) welding aluminum
is:
b only - ANS Technician A says that a difference with spray-arc transfer compared to short-
circuit is a higher voltage setting.Technician B says that a difference with spray-arc transfer
compared to short-circuit is a higher amperage setting.Who is right?
b only - ANS Technician A says that a disadvantage of spool guns is the higher voltage and
amperage settings required.Technician B says that a disadvantage of spool guns is the large size,
which may limit access to some areas.Who is right?
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, liner length - ANS A standard push wire feeder, when used with aluminum electrode, may
have a limited:
recessed slightly inside the nozzle. - ANS The contact tip on an aluminum GMA (MIG) welding
gun is generally:
both a and b - ANS Technician A says that the diameter of the electrode wire for welding
aluminum may be specified by the vehicle maker.Technician B says that the diameter of the
electrode wire for welding aluminum may be specified by the type of joint and material
thickness.Who is right?
higher amperage settings than for welding steel. - ANS The quick heat-spreading nature of
aluminum requires:
both a and b - ANS Technician A says that wire brushing bare aluminum can be done to
remove aluminum oxide.Technician B says that wire brushing must be done with a stainless
steel brush that is dedi-cated for use on aluminum.Who is right?
both a and b - ANS Technician A says that pressing too hard when sanding aluminum can
imbed impurities into the surface.Technician B says that pressing too hard when sanding
aluminum can overheat and weaken the aluminum
use the same alloy as the aluminum that will be welded. - ANS When tuning the welder with
practice aluminum coupons:
b only - ANS Technician A says that to compensate for cold start when welding aluminum,
increase the shielding gas flow rate.Technician B says that to compensate for cold start when
welding aluminum, try starting the weld off the joint.Who is right?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Both a and b - ANS Technician A says that one of the advantages of using GMA (MIG) welding
for aluminum is that this process can be used on a variety of alloys and thicknesses.Technician B
says that one of the advantages of using GMA (MIG) welding for aluminum is that there is no
high-frequency arc problems.Who is right?
a only - ANS A GMA (MIG) welder used for steel is being converted for use with aluminum.
Technician A says that "U" shaped drive rolls are needed. Technician B says that a different type
of gas flow meter is needed. Who is right?
dedicated for use only with aluminum. - ANS The gun liner for GMA (MIG) welding aluminum
is:
b only - ANS Technician A says that a difference with spray-arc transfer compared to short-
circuit is a higher voltage setting.Technician B says that a difference with spray-arc transfer
compared to short-circuit is a higher amperage setting.Who is right?
b only - ANS Technician A says that a disadvantage of spool guns is the higher voltage and
amperage settings required.Technician B says that a disadvantage of spool guns is the large size,
which may limit access to some areas.Who is right?
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, liner length - ANS A standard push wire feeder, when used with aluminum electrode, may
have a limited:
recessed slightly inside the nozzle. - ANS The contact tip on an aluminum GMA (MIG) welding
gun is generally:
both a and b - ANS Technician A says that the diameter of the electrode wire for welding
aluminum may be specified by the vehicle maker.Technician B says that the diameter of the
electrode wire for welding aluminum may be specified by the type of joint and material
thickness.Who is right?
higher amperage settings than for welding steel. - ANS The quick heat-spreading nature of
aluminum requires:
both a and b - ANS Technician A says that wire brushing bare aluminum can be done to
remove aluminum oxide.Technician B says that wire brushing must be done with a stainless
steel brush that is dedi-cated for use on aluminum.Who is right?
both a and b - ANS Technician A says that pressing too hard when sanding aluminum can
imbed impurities into the surface.Technician B says that pressing too hard when sanding
aluminum can overheat and weaken the aluminum
use the same alloy as the aluminum that will be welded. - ANS When tuning the welder with
practice aluminum coupons:
b only - ANS Technician A says that to compensate for cold start when welding aluminum,
increase the shielding gas flow rate.Technician B says that to compensate for cold start when
welding aluminum, try starting the weld off the joint.Who is right?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
