NOCTI WELDING CORE EXAMS SET 2025/2026 QUESTIONS
AND ANSWERS GRADED A+
✔✔Arc-Drive - ✔✔Automatically enhances Stick welding, especially on pipe, by
focusing the arc and preventing the electrode from going out.
✔✔Arrow Side - ✔✔The side of the joint to which the arrow points
✔✔Auto-Crater - ✔✔Allows a TIG (Tungsten Inert Gas) arc to crater-out, allowing time
for the addition of filler, without the loss of shielding gas. Eliminates the need for a
remote control at arc end.
✔✔Automatic Process - ✔✔The control of a process with equipment that requires little
or no observation of the welding and no manual adjustment of the equipment controls.
✔✔Backing Bar - ✔✔A welding aid used to prevent melting through of a joint when
performing a complete-joint penetration groove weld.
✔✔Backing Gas - ✔✔A shielding gas used on the underside of a weld bead to protect it
from atmospheric contamination
✔✔Backing Weld - ✔✔A weld bead applied to the root of a single groove joint to assure
complete root penetration.
✔✔Backing - ✔✔A material (base metal, weld metal, or granular material) placed at the
root of a weld joint for the purpose of supporting molten weld metal.
✔✔Butt Joint - ✔✔A joint between two members lying in the same plane
✔✔Butt Weld - ✔✔A weld where two pieces of metal are to be joined are in the same
plane.
✔✔Chain Intermittent Weld - ✔✔A welding technique where the weld is created by
alternatively
welding either side of the metal joint, along the entire joint
✔✔Chipping - ✔✔A method of removing surface defects with a chisel, so that the
defects will not be worked into the finished product.
✔✔Concavity - ✔✔The maximum distance from the face of a concave fillet weld
perpendicular to a line joining the weld toes.
, ✔✔Constant Current (CC) Welding Machine - ✔✔Welding machine with limited
maximum short circuit current. They have a negative volt-amp curve and are often
referred to as "droopers."
✔✔Constant Voltage (CV), Constant Potential (CP) Welding Machine - ✔✔Welding
machine that maintains a relatively stable, consistent voltage regardless of the
amperage output. It results in a relatively flat volt-amp curve.
✔✔Constant-Speed Wire Feeder - ✔✔Feeder operates from 24 or 115 VAC supplied by
the welding
power source.
✔✔Contour - ✔✔The shape of the top of a finished weld.
✔✔Convex Contour - ✔✔A contour in which the face of the weld curves out.
✔✔Convexity - ✔✔The maximum distance from the face of a convex fillet weld
perpendicular to a line joining the weld toes.
✔✔Countersink - ✔✔A conical hole cut into a manufactured object, or the cutter used to
cut such a hole.
✔✔Current - ✔✔The amount of electricity flowing past a point in a conductor every
second.
✔✔Destructive testing - ✔✔The physical destruction of the completed weld in order to
evaluate its characteristics.
✔✔Direct Current (DC) - ✔✔Current that flows in one direction and does not reverse its
direction of flow
✔✔Direct Current Electrode Negative (DCEN) - ✔✔The direction of current flow through
a welding
circuit when the electrode lead is connected to the negative terminal and the work lead
is
connected to the positive terminal of a DC welding machine. Also called direct current,
straight
polarity (DCSP).
✔✔Direct Current Electrode Positive (DCEP) - ✔✔The direction of current flow through
a welding
circuit when the electrode lead is connected to a positive terminal and the work lead is
connected
to a negative terminal to a DC welding machine. Also called direct current, reverse
polarity
AND ANSWERS GRADED A+
✔✔Arc-Drive - ✔✔Automatically enhances Stick welding, especially on pipe, by
focusing the arc and preventing the electrode from going out.
✔✔Arrow Side - ✔✔The side of the joint to which the arrow points
✔✔Auto-Crater - ✔✔Allows a TIG (Tungsten Inert Gas) arc to crater-out, allowing time
for the addition of filler, without the loss of shielding gas. Eliminates the need for a
remote control at arc end.
✔✔Automatic Process - ✔✔The control of a process with equipment that requires little
or no observation of the welding and no manual adjustment of the equipment controls.
✔✔Backing Bar - ✔✔A welding aid used to prevent melting through of a joint when
performing a complete-joint penetration groove weld.
✔✔Backing Gas - ✔✔A shielding gas used on the underside of a weld bead to protect it
from atmospheric contamination
✔✔Backing Weld - ✔✔A weld bead applied to the root of a single groove joint to assure
complete root penetration.
✔✔Backing - ✔✔A material (base metal, weld metal, or granular material) placed at the
root of a weld joint for the purpose of supporting molten weld metal.
✔✔Butt Joint - ✔✔A joint between two members lying in the same plane
✔✔Butt Weld - ✔✔A weld where two pieces of metal are to be joined are in the same
plane.
✔✔Chain Intermittent Weld - ✔✔A welding technique where the weld is created by
alternatively
welding either side of the metal joint, along the entire joint
✔✔Chipping - ✔✔A method of removing surface defects with a chisel, so that the
defects will not be worked into the finished product.
✔✔Concavity - ✔✔The maximum distance from the face of a concave fillet weld
perpendicular to a line joining the weld toes.
, ✔✔Constant Current (CC) Welding Machine - ✔✔Welding machine with limited
maximum short circuit current. They have a negative volt-amp curve and are often
referred to as "droopers."
✔✔Constant Voltage (CV), Constant Potential (CP) Welding Machine - ✔✔Welding
machine that maintains a relatively stable, consistent voltage regardless of the
amperage output. It results in a relatively flat volt-amp curve.
✔✔Constant-Speed Wire Feeder - ✔✔Feeder operates from 24 or 115 VAC supplied by
the welding
power source.
✔✔Contour - ✔✔The shape of the top of a finished weld.
✔✔Convex Contour - ✔✔A contour in which the face of the weld curves out.
✔✔Convexity - ✔✔The maximum distance from the face of a convex fillet weld
perpendicular to a line joining the weld toes.
✔✔Countersink - ✔✔A conical hole cut into a manufactured object, or the cutter used to
cut such a hole.
✔✔Current - ✔✔The amount of electricity flowing past a point in a conductor every
second.
✔✔Destructive testing - ✔✔The physical destruction of the completed weld in order to
evaluate its characteristics.
✔✔Direct Current (DC) - ✔✔Current that flows in one direction and does not reverse its
direction of flow
✔✔Direct Current Electrode Negative (DCEN) - ✔✔The direction of current flow through
a welding
circuit when the electrode lead is connected to the negative terminal and the work lead
is
connected to the positive terminal of a DC welding machine. Also called direct current,
straight
polarity (DCSP).
✔✔Direct Current Electrode Positive (DCEP) - ✔✔The direction of current flow through
a welding
circuit when the electrode lead is connected to a positive terminal and the work lead is
connected
to a negative terminal to a DC welding machine. Also called direct current, reverse
polarity
