PIPEFITTER NCCER 2026 EXAM QUESTIONS AND ANSWERS
GRADED A+
✔✔Disturbed soil - ✔✔Soil that has been previously back-filled or removed from the
earth and replaced by any means.
✔✔Eccentric reducer - ✔✔A reducer that displaces the center line of the smaller of the
two joining pipes to one side.
✔✔Elastomeric - ✔✔Rubberized. Made of an elastic substance such as a polyvinyl
elastomer
✔✔Elbow - ✔✔A fitting that makes an angle between adjacent pipes. An elbow is
always 90 degrees unless another angle is stated; also known as an ell.
✔✔Elliptical - ✔✔Oval shaped
✔✔Excavation - ✔✔Any man-made cut, cavity, trench, or depression in the earth's
surface, formed by earth removal.
✔✔Exfiltration - ✔✔The exiting of a fluid or substance from a closed system to the
atmosphere or surroundings.
✔✔Exponent - ✔✔A number or symbol placed to the right and above another number,
symbol, or expression, denoting the power to which the latter is to be raised.
✔✔Factors - ✔✔The numbers that can be multiplied together to produce a given
product
✔✔Fillet weld - ✔✔A weld with a triangular cross section joining two surfaces at right
angles to each other.
✔✔Finished grade - ✔✔Any surface that has been cut or built to the elevation indicated
for that point.
✔✔Fit up - ✔✔To put piping material in position to be welded together.
✔✔Flange - ✔✔A form of attachment between pipes consisting of a ring perpendicular
to the line of pipe, with holes drilled through the ring parallel to the pipe line, through
which bolts may be used to attach the pipe or fitting to another flanged pipe or fitting.
✔✔Formula - ✔✔An equation that states a rule
, ✔✔Full-penetration weld - ✔✔A fitting with a butt that has the same outside diameter
and inside diameter as the pipe. It is usually joined to a pipe by heat.
✔✔Fusion fitting - ✔✔A fitting with a butt that has the same outside diameter and inside
diameter as the pipe. It is usually joined to a pipe by heat
✔✔Galling - ✔✔Deformity of the threads in which the threads are stripped.
✔✔Gasket - ✔✔A packing used to make a pressure-tight joint between two stationary
parts.
✔✔Gate valve - ✔✔A valve with a straight-through flow design that exhibits very little
resistance to flow. It is normally used for open/ shut applications
✔✔Globe valve - ✔✔A valve in which flow is always parallel to the stem as it goes past
the seat.
✔✔Grade pin - ✔✔Steel rod driven into the ground at each surveyor's hub. A string is
attached between them at the grade indicated on the information stakes.
✔✔Grade rod - ✔✔A small length of round or rectangular wood or metal used in place
of a rule for checking grades.
✔✔Grade - ✔✔The surface level required by the plans or specifications.
✔✔Haunch - ✔✔The area below the middle of the pipe in a bench.
✔✔Head loss - ✔✔The loss of pressure due to friction and flow disturbances within a
system.
✔✔High Density Polyethylene (HDPE) - ✔✔A type of pipe.
✔✔Hub - ✔✔A point-of-origin stake that identifies a point on the ground. The top of the
hub establishes the point from which soil elevations and distances are computed.
✔✔Hydration - ✔✔A chemical process in which water or liquids accumulate and cause
a breakdown of surrounding minerals, such as dirt.
✔✔Hydronic - ✔✔a system that heats and cools by circulating water or steam through a
closed piping system
✔✔Hypotenuse - ✔✔the longest side of a right triangle. It is always located opposite the
angle.
GRADED A+
✔✔Disturbed soil - ✔✔Soil that has been previously back-filled or removed from the
earth and replaced by any means.
✔✔Eccentric reducer - ✔✔A reducer that displaces the center line of the smaller of the
two joining pipes to one side.
✔✔Elastomeric - ✔✔Rubberized. Made of an elastic substance such as a polyvinyl
elastomer
✔✔Elbow - ✔✔A fitting that makes an angle between adjacent pipes. An elbow is
always 90 degrees unless another angle is stated; also known as an ell.
✔✔Elliptical - ✔✔Oval shaped
✔✔Excavation - ✔✔Any man-made cut, cavity, trench, or depression in the earth's
surface, formed by earth removal.
✔✔Exfiltration - ✔✔The exiting of a fluid or substance from a closed system to the
atmosphere or surroundings.
✔✔Exponent - ✔✔A number or symbol placed to the right and above another number,
symbol, or expression, denoting the power to which the latter is to be raised.
✔✔Factors - ✔✔The numbers that can be multiplied together to produce a given
product
✔✔Fillet weld - ✔✔A weld with a triangular cross section joining two surfaces at right
angles to each other.
✔✔Finished grade - ✔✔Any surface that has been cut or built to the elevation indicated
for that point.
✔✔Fit up - ✔✔To put piping material in position to be welded together.
✔✔Flange - ✔✔A form of attachment between pipes consisting of a ring perpendicular
to the line of pipe, with holes drilled through the ring parallel to the pipe line, through
which bolts may be used to attach the pipe or fitting to another flanged pipe or fitting.
✔✔Formula - ✔✔An equation that states a rule
, ✔✔Full-penetration weld - ✔✔A fitting with a butt that has the same outside diameter
and inside diameter as the pipe. It is usually joined to a pipe by heat.
✔✔Fusion fitting - ✔✔A fitting with a butt that has the same outside diameter and inside
diameter as the pipe. It is usually joined to a pipe by heat
✔✔Galling - ✔✔Deformity of the threads in which the threads are stripped.
✔✔Gasket - ✔✔A packing used to make a pressure-tight joint between two stationary
parts.
✔✔Gate valve - ✔✔A valve with a straight-through flow design that exhibits very little
resistance to flow. It is normally used for open/ shut applications
✔✔Globe valve - ✔✔A valve in which flow is always parallel to the stem as it goes past
the seat.
✔✔Grade pin - ✔✔Steel rod driven into the ground at each surveyor's hub. A string is
attached between them at the grade indicated on the information stakes.
✔✔Grade rod - ✔✔A small length of round or rectangular wood or metal used in place
of a rule for checking grades.
✔✔Grade - ✔✔The surface level required by the plans or specifications.
✔✔Haunch - ✔✔The area below the middle of the pipe in a bench.
✔✔Head loss - ✔✔The loss of pressure due to friction and flow disturbances within a
system.
✔✔High Density Polyethylene (HDPE) - ✔✔A type of pipe.
✔✔Hub - ✔✔A point-of-origin stake that identifies a point on the ground. The top of the
hub establishes the point from which soil elevations and distances are computed.
✔✔Hydration - ✔✔A chemical process in which water or liquids accumulate and cause
a breakdown of surrounding minerals, such as dirt.
✔✔Hydronic - ✔✔a system that heats and cools by circulating water or steam through a
closed piping system
✔✔Hypotenuse - ✔✔the longest side of a right triangle. It is always located opposite the
angle.
