WX-007 – Shielded Metal Arc Welding (SMAW)
Fundamentals, Techniques, Positions &
Parameters – omplete Answer Key (2025)
Shielded Metal Arc Welding - Is a process in which the arc is shielded by the decomposition
of the electrode covering.✅✅✅
Fusion - This is achieved by generating an electric arc between a metallic electrode and the
work piece (base Metal) which melts the electrode and base metal and joins the two
together.✅✅✅
SMAW requires a power supply unit that ? - Produces either DC or AC current; the type of
metal being welded will determine the type of current to be used.✅✅✅
Coated Consumable Metallic Electrode - Used to carry the current from the power supply
unit to the base metal in Shielded Metal Arc Welding.✅✅✅Electric Arc - Forms between
the electrode and the base metal generating the heat required for welding.✅✅✅
Arc - Produces the required heat to melt the electrode and base metal, and burn the electrode
coating.✅✅✅
Forming the bead - The molten metal deposits of the electrode mix with the molten base
metal and are consumed in the weld as the two join together.✅✅✅
Flux Coating - This is the coating on the electrode that burns and produces a vapor; the vapor
shields the weld arc and molten pool from contaminants in the surrounding
atmosphere.✅✅✅
Direct Current Electrode Negative (DCEN) - Formally referred to as straight polarity,
produces a shallow weld penetration.✅✅✅
Direct Current Electrode Positive(DCEP) - Formally referred to as reverse polarity, produces
a deeper weld penetration and a narrower weld bead profile.✅✅✅
What does the Welder determines? - The setting for the machine, electrodes, type and
thickness of metal to be welded, and the position of the joints.✅✅✅
Electrode Holder - Also known as "Stinger" claps to the electrode.✅✅✅
Slag - This is formed as the weld bead progresses and the molten metal deposited over the
completed weld.✅✅✅
, This insulates the bead from contaminates in the surrounding atmosphere. - Slag✅✅✅
This is a widely used welding process due to its versitility, profitability, and comparatively
simple and inexpensive equipment. - SMAW✅✅✅
Most popular types of metals welded using SMAW - Mild and low alloy steels ( not all metal
can be welded with this process due to the heat output and the chemistry make up of certain
non-ferrous metals.✅✅✅
NEC (National Electric Code) - Is the law governing the installation of welding equipment
and how it is to be electrically connected.✅✅✅
Welding Machines should be equipment with what? - A Power Disconnect located at or near
the machine so power can be shut off quickly.✅✅✅
Do not operate the Range Switch when? - While the machine is under load, it is to be
operated only while the machine is idling and the current is open.✅✅✅
Heat - Is generated from an arc that develops between the electrode and the base
metal.✅✅✅
The Air Gap - This produces a high resistance to the flow of current .✅✅✅
The Resistance - This creates an intense arc heat ranging anywhere from 6000F to 10,000F.
Current is provided by an AC or DC machine.✅✅✅
220 or 440 Volts - These are the primary current to a welding machine.✅✅✅
Machine Voltage and Amperage - Voltage output is low and amperage output is
high.✅✅✅
The Voltage output produces what? - This produces the welding current which ranges from
18 to 36 volts.✅✅✅
The Amperage output produces what? - This provides the heat which ranges from 25 to 500
amps.✅✅✅
Alternating Current (AC) - An electrical current having alternating positive and negative
values. Current flows in one direction the first half of the cycle and the opposite direction for
the second half.✅✅✅
Rate of Change - Refers to frequency which is indicated as 25, 40 50 and 60 cycles per
second.✅✅✅
Direct Current (DC) - An Electrical current that flows in one direction only.✅✅✅
Fundamentals, Techniques, Positions &
Parameters – omplete Answer Key (2025)
Shielded Metal Arc Welding - Is a process in which the arc is shielded by the decomposition
of the electrode covering.✅✅✅
Fusion - This is achieved by generating an electric arc between a metallic electrode and the
work piece (base Metal) which melts the electrode and base metal and joins the two
together.✅✅✅
SMAW requires a power supply unit that ? - Produces either DC or AC current; the type of
metal being welded will determine the type of current to be used.✅✅✅
Coated Consumable Metallic Electrode - Used to carry the current from the power supply
unit to the base metal in Shielded Metal Arc Welding.✅✅✅Electric Arc - Forms between
the electrode and the base metal generating the heat required for welding.✅✅✅
Arc - Produces the required heat to melt the electrode and base metal, and burn the electrode
coating.✅✅✅
Forming the bead - The molten metal deposits of the electrode mix with the molten base
metal and are consumed in the weld as the two join together.✅✅✅
Flux Coating - This is the coating on the electrode that burns and produces a vapor; the vapor
shields the weld arc and molten pool from contaminants in the surrounding
atmosphere.✅✅✅
Direct Current Electrode Negative (DCEN) - Formally referred to as straight polarity,
produces a shallow weld penetration.✅✅✅
Direct Current Electrode Positive(DCEP) - Formally referred to as reverse polarity, produces
a deeper weld penetration and a narrower weld bead profile.✅✅✅
What does the Welder determines? - The setting for the machine, electrodes, type and
thickness of metal to be welded, and the position of the joints.✅✅✅
Electrode Holder - Also known as "Stinger" claps to the electrode.✅✅✅
Slag - This is formed as the weld bead progresses and the molten metal deposited over the
completed weld.✅✅✅
, This insulates the bead from contaminates in the surrounding atmosphere. - Slag✅✅✅
This is a widely used welding process due to its versitility, profitability, and comparatively
simple and inexpensive equipment. - SMAW✅✅✅
Most popular types of metals welded using SMAW - Mild and low alloy steels ( not all metal
can be welded with this process due to the heat output and the chemistry make up of certain
non-ferrous metals.✅✅✅
NEC (National Electric Code) - Is the law governing the installation of welding equipment
and how it is to be electrically connected.✅✅✅
Welding Machines should be equipment with what? - A Power Disconnect located at or near
the machine so power can be shut off quickly.✅✅✅
Do not operate the Range Switch when? - While the machine is under load, it is to be
operated only while the machine is idling and the current is open.✅✅✅
Heat - Is generated from an arc that develops between the electrode and the base
metal.✅✅✅
The Air Gap - This produces a high resistance to the flow of current .✅✅✅
The Resistance - This creates an intense arc heat ranging anywhere from 6000F to 10,000F.
Current is provided by an AC or DC machine.✅✅✅
220 or 440 Volts - These are the primary current to a welding machine.✅✅✅
Machine Voltage and Amperage - Voltage output is low and amperage output is
high.✅✅✅
The Voltage output produces what? - This produces the welding current which ranges from
18 to 36 volts.✅✅✅
The Amperage output produces what? - This provides the heat which ranges from 25 to 500
amps.✅✅✅
Alternating Current (AC) - An electrical current having alternating positive and negative
values. Current flows in one direction the first half of the cycle and the opposite direction for
the second half.✅✅✅
Rate of Change - Refers to frequency which is indicated as 25, 40 50 and 60 cycles per
second.✅✅✅
Direct Current (DC) - An Electrical current that flows in one direction only.✅✅✅
