Ag Mechanics EOPA Review 1 Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What type of sheilding gas is used for MIG welding steel? - CORRECT ANSWER Argon and
Carbon Dioxide
What is the mix ratio for shielding gas used in MIG welding steel? - CORRECT ANSWER
75% Argon 25% Carbon Dioxide
What is the minimum recommended shade lens for MIG welding? - CORRECT ANSWER #10
The flow rate of shielding gas while MIG welding steel should be... - CORRECT ANSWER
25-30cfm
"stick out " of welding wire should be? - CORRECT ANSWER 3/8" - 1/2"
travel speed - CORRECT ANSWER The speed at which you move the welder along the metal
that you're welding
work clamp - CORRECT ANSWER This is used to complete the welding circuit should be
fastened to the metal being welded as close as possible so that the electrical flow wont have to travel
so far
contact tip - CORRECT ANSWER A consumable item on a GMAC welder which means that it
wears out as electrode wire passes through it. As the contact tip wears out it becomes larger
MIG - CORRECT ANSWER Metal inert gas
sheilding gas - CORRECT ANSWER In GMAW, This gas is used to shield the weld and the
surrounding areas so that normal atmospheric gasses such as nitrogen and oxygen do not interfere and
contaminate the weld as it is formed
,gas flow meter - CORRECT ANSWER A device which takes high pressure gas stored in the
gas cylinder and reduces it to a usable level and flow rate
porosity - CORRECT ANSWER A situation when gas becomes trapped in the weld as it is
being formed. That trapped gas then becomes small holes which can be either spherical or cylindrical
in shape
aws - CORRECT ANSWER American Welding Society
wire size - CORRECT ANSWER The size of the wire that comes out of the welder
GMAW welder - CORRECT ANSWER Also called MIG welding, most commonly used in
Auto collision and was originally developed in 1940 as a way of fusing aluminum and other non-
ferrous metals together
amperage - CORRECT ANSWER the amount of current required to melt the base metal and
the electrode
electrode (MIG welding process) - CORRECT ANSWER the welding wire
torch angle - CORRECT ANSWER The angle in which a welding technician holds the gun in
relation to the work
continuous weld - CORRECT ANSWER A welding method in which the arc is struck and a
smooth uninterrupted bead is applied in a steady ongoing movement, the push or forward direction of
travel is used
plug weld - CORRECT ANSWER A weld that is placed through the drilled or punched piece
or pieces, The direction of travel is push or forward due to the work angle being 90 degrees to the
work at the bottom of the hole where the base metal is thinnest
,stitch weld - CORRECT ANSWER A series of short overlapping MIG spot welds which when
finished create a continuous stream. This weld is often used on thin metal where warpage and burn
through must be controlled
lap weld - CORRECT ANSWER A weld used where two pieces of metal are overlapping
themselves and the weld bead is placed to penetrate them both
butt weld - CORRECT ANSWER connecting two pieces of sheet metal that are directly
parallel and don't overlap
weld defect - CORRECT ANSWER A flaw in the weld often caused by too many
discontinuities in structural welding, if a weld is defective it may need to be ground out or re applied
to meet the standards
weld undercutting - CORRECT ANSWER It is located at the junction of the weld and the base
metal. As the name implies, it is a small furrowing of the weld as it needs the base metal. it can be
caused by conditions as an arc length that is too long, an improper gun angle and a weld speed that is
too fast
weld overlap - CORRECT ANSWER It is a labor operation that is duplicated when two or
more parts are serviced, replaced, or refinished at the same time. In terms of welding it is the
protrusion beyond the toe, faced, or root of the weld without fusion
weld penetration - CORRECT ANSWER common defect among new welders occurs when the
weld fusion doesn't go deep enough into the base metal to produce a strong weld
ultra violet light - CORRECT ANSWER light waves created by the welding process that
causes a burn similar to sun burn
wire feeder - CORRECT ANSWER A device which supplies a steady stream of wire to the
welding gun
weld liner - CORRECT ANSWER The sole purpose is to guide the welding wire from the
welding feeder through the torch cable and to the contact tip
, improper fusion - CORRECT ANSWER The failure of the base metal and the filler metal to
combine properly. This failure of fusion can be caused by low or inadequate heat, poor weld
technique, insufficient gap or improper edge set up
high pressure cylinder - CORRECT ANSWER Having or involving pressure above the normal
weld spatter - CORRECT ANSWER A spot where metals have been welded together
bird nest - CORRECT ANSWER
MIG welding torch - CORRECT ANSWER
welding helmet - CORRECT ANSWER
welding jacket - CORRECT ANSWER
welding gloves - CORRECT ANSWER
wire spool - CORRECT ANSWER
weld flash - CORRECT ANSWER medical condition of the eye as a result of exposure to UV
and IR rays during the welding process
flux core - CORRECT ANSWER Welding wire that is coated so that no shielding gas is
required for MIG welding steel
Bearing - CORRECT ANSWER
Cam Lobe - CORRECT ANSWER
Camshaft - CORRECT ANSWER
UPDATED QUESTIONS AND CORRECT
ANSWERS
What type of sheilding gas is used for MIG welding steel? - CORRECT ANSWER Argon and
Carbon Dioxide
What is the mix ratio for shielding gas used in MIG welding steel? - CORRECT ANSWER
75% Argon 25% Carbon Dioxide
What is the minimum recommended shade lens for MIG welding? - CORRECT ANSWER #10
The flow rate of shielding gas while MIG welding steel should be... - CORRECT ANSWER
25-30cfm
"stick out " of welding wire should be? - CORRECT ANSWER 3/8" - 1/2"
travel speed - CORRECT ANSWER The speed at which you move the welder along the metal
that you're welding
work clamp - CORRECT ANSWER This is used to complete the welding circuit should be
fastened to the metal being welded as close as possible so that the electrical flow wont have to travel
so far
contact tip - CORRECT ANSWER A consumable item on a GMAC welder which means that it
wears out as electrode wire passes through it. As the contact tip wears out it becomes larger
MIG - CORRECT ANSWER Metal inert gas
sheilding gas - CORRECT ANSWER In GMAW, This gas is used to shield the weld and the
surrounding areas so that normal atmospheric gasses such as nitrogen and oxygen do not interfere and
contaminate the weld as it is formed
,gas flow meter - CORRECT ANSWER A device which takes high pressure gas stored in the
gas cylinder and reduces it to a usable level and flow rate
porosity - CORRECT ANSWER A situation when gas becomes trapped in the weld as it is
being formed. That trapped gas then becomes small holes which can be either spherical or cylindrical
in shape
aws - CORRECT ANSWER American Welding Society
wire size - CORRECT ANSWER The size of the wire that comes out of the welder
GMAW welder - CORRECT ANSWER Also called MIG welding, most commonly used in
Auto collision and was originally developed in 1940 as a way of fusing aluminum and other non-
ferrous metals together
amperage - CORRECT ANSWER the amount of current required to melt the base metal and
the electrode
electrode (MIG welding process) - CORRECT ANSWER the welding wire
torch angle - CORRECT ANSWER The angle in which a welding technician holds the gun in
relation to the work
continuous weld - CORRECT ANSWER A welding method in which the arc is struck and a
smooth uninterrupted bead is applied in a steady ongoing movement, the push or forward direction of
travel is used
plug weld - CORRECT ANSWER A weld that is placed through the drilled or punched piece
or pieces, The direction of travel is push or forward due to the work angle being 90 degrees to the
work at the bottom of the hole where the base metal is thinnest
,stitch weld - CORRECT ANSWER A series of short overlapping MIG spot welds which when
finished create a continuous stream. This weld is often used on thin metal where warpage and burn
through must be controlled
lap weld - CORRECT ANSWER A weld used where two pieces of metal are overlapping
themselves and the weld bead is placed to penetrate them both
butt weld - CORRECT ANSWER connecting two pieces of sheet metal that are directly
parallel and don't overlap
weld defect - CORRECT ANSWER A flaw in the weld often caused by too many
discontinuities in structural welding, if a weld is defective it may need to be ground out or re applied
to meet the standards
weld undercutting - CORRECT ANSWER It is located at the junction of the weld and the base
metal. As the name implies, it is a small furrowing of the weld as it needs the base metal. it can be
caused by conditions as an arc length that is too long, an improper gun angle and a weld speed that is
too fast
weld overlap - CORRECT ANSWER It is a labor operation that is duplicated when two or
more parts are serviced, replaced, or refinished at the same time. In terms of welding it is the
protrusion beyond the toe, faced, or root of the weld without fusion
weld penetration - CORRECT ANSWER common defect among new welders occurs when the
weld fusion doesn't go deep enough into the base metal to produce a strong weld
ultra violet light - CORRECT ANSWER light waves created by the welding process that
causes a burn similar to sun burn
wire feeder - CORRECT ANSWER A device which supplies a steady stream of wire to the
welding gun
weld liner - CORRECT ANSWER The sole purpose is to guide the welding wire from the
welding feeder through the torch cable and to the contact tip
, improper fusion - CORRECT ANSWER The failure of the base metal and the filler metal to
combine properly. This failure of fusion can be caused by low or inadequate heat, poor weld
technique, insufficient gap or improper edge set up
high pressure cylinder - CORRECT ANSWER Having or involving pressure above the normal
weld spatter - CORRECT ANSWER A spot where metals have been welded together
bird nest - CORRECT ANSWER
MIG welding torch - CORRECT ANSWER
welding helmet - CORRECT ANSWER
welding jacket - CORRECT ANSWER
welding gloves - CORRECT ANSWER
wire spool - CORRECT ANSWER
weld flash - CORRECT ANSWER medical condition of the eye as a result of exposure to UV
and IR rays during the welding process
flux core - CORRECT ANSWER Welding wire that is coated so that no shielding gas is
required for MIG welding steel
Bearing - CORRECT ANSWER
Cam Lobe - CORRECT ANSWER
Camshaft - CORRECT ANSWER
