PIPEFITTER NCCER PRACTICE EXAM QUESTIONS AND
ANSWERS GRADED A+
✔✔Benching - ✔✔A method of protecting workers from cave-ins by excavating the
sides of an excavation to form one or a series of horizontal levels or steps, usually with
vertical or near-vertical surfaces between levels.
✔✔Bevel - ✔✔An angle cut or ground on the end of a piece of solid material.
✔✔Body - ✔✔The main part of the valve. It contains the disc, seat, and valve ports. The
body of the valve is directly connected to the piping by threaded, welded, or flanged
ends
✔✔Bonnet - ✔✔The part of a valve containing the valve stem and packing.
✔✔Boring - ✔✔Drilling through the ground, either to access resources or to place pipe.
✔✔Branch - ✔✔The outlet or inlet of a fitting not in line with the run but which may make
any angle.
✔✔Branch - ✔✔The outlet or inlet of a fitting, which is not in line with the pipe run but
may make any angle off of the pipe run.
✔✔Burn-through - ✔✔A hole that is formed in a weld due to improper grinding or
welding
✔✔Bushing - ✔✔A pipe fitting that connects a pipe with a fitting of a larger nominal size.
A bushing is a hollow plug with internal and external threads to suit the different
diameters
✔✔Butterfly valve - ✔✔A quarter-turn valve with a platelike disc that stops flow when
the outside area of the disc seals against the inside of the valve body.
✔✔Carbonation - ✔✔A chemical process in which carbon accumulates and causes a
breakdown of surrounding minerals, such as dirt
✔✔Catchment basin - ✔✔A bowl area constructed to capture and retain runoff water
✔✔Caustic - ✔✔A material that is capable of burning or corroding by chemical action.
✔✔Cellular core wall - ✔✔Plastic pipe wall that is low-density, lightweight plastic
containing entrained (trapped) air.
✔✔Chamfer - ✔✔An angle cut or ground only on the edge of a piece of material
, ✔✔Chase - ✔✔
✔✔Check valve - ✔✔A valve that allows flow in one direction only.
✔✔Chemically inert - ✔✔Does not react with other chemicals.
✔✔Chlorinated polyvinyl chloride (CPVC): - ✔✔Plastic pipe and fittings used extensively
in hot and cold water distribution systems.
✔✔Circle - ✔✔A continuous curved line that encloses a space, with every point on the
line the same distance from the center of the circle
✔✔Circumference - ✔✔The distance around a circle
✔✔Close nipple - ✔✔A nipple that is about twice the length of a standard thread and
threaded from end to end with no shoulder
✔✔Coffer dam - ✔✔A temporary dam constructed to divert or contain water.
✔✔Compaction - ✔✔The action of forcing small soil particles between larger ones until
most of the air space or voids and moisture have been squeezed out. The result is a
hard, solid, rocklike mass.
✔✔Competent person - ✔✔A person who is capable of identifying existing and
predictable hazards in the area or working conditions that are unsanitary, hazardous, or
dangerous to employees, and who has the authority to take prompt corrective measures
to fix the problem.
✔✔Compression collar - ✔✔A piece of hardware that uses compression force to
connect sections of polyethylene piping.
✔✔Compression strength - ✔✔The ability of soil to hold a heavy weight.
✔✔Concentric reducer - ✔✔A reducer that maintains the same center line between the
two pipes that it joins.
✔✔Condensate - ✔✔The liquid product of steam, caused by a loss in temperature or
pressure.
✔✔Control valve - ✔✔A globe valve automatically controlled to regulate flow through
the valve.
✔✔Corrosive - ✔✔Causing the gradual destruction of a substance by chemical action.
ANSWERS GRADED A+
✔✔Benching - ✔✔A method of protecting workers from cave-ins by excavating the
sides of an excavation to form one or a series of horizontal levels or steps, usually with
vertical or near-vertical surfaces between levels.
✔✔Bevel - ✔✔An angle cut or ground on the end of a piece of solid material.
✔✔Body - ✔✔The main part of the valve. It contains the disc, seat, and valve ports. The
body of the valve is directly connected to the piping by threaded, welded, or flanged
ends
✔✔Bonnet - ✔✔The part of a valve containing the valve stem and packing.
✔✔Boring - ✔✔Drilling through the ground, either to access resources or to place pipe.
✔✔Branch - ✔✔The outlet or inlet of a fitting not in line with the run but which may make
any angle.
✔✔Branch - ✔✔The outlet or inlet of a fitting, which is not in line with the pipe run but
may make any angle off of the pipe run.
✔✔Burn-through - ✔✔A hole that is formed in a weld due to improper grinding or
welding
✔✔Bushing - ✔✔A pipe fitting that connects a pipe with a fitting of a larger nominal size.
A bushing is a hollow plug with internal and external threads to suit the different
diameters
✔✔Butterfly valve - ✔✔A quarter-turn valve with a platelike disc that stops flow when
the outside area of the disc seals against the inside of the valve body.
✔✔Carbonation - ✔✔A chemical process in which carbon accumulates and causes a
breakdown of surrounding minerals, such as dirt
✔✔Catchment basin - ✔✔A bowl area constructed to capture and retain runoff water
✔✔Caustic - ✔✔A material that is capable of burning or corroding by chemical action.
✔✔Cellular core wall - ✔✔Plastic pipe wall that is low-density, lightweight plastic
containing entrained (trapped) air.
✔✔Chamfer - ✔✔An angle cut or ground only on the edge of a piece of material
, ✔✔Chase - ✔✔
✔✔Check valve - ✔✔A valve that allows flow in one direction only.
✔✔Chemically inert - ✔✔Does not react with other chemicals.
✔✔Chlorinated polyvinyl chloride (CPVC): - ✔✔Plastic pipe and fittings used extensively
in hot and cold water distribution systems.
✔✔Circle - ✔✔A continuous curved line that encloses a space, with every point on the
line the same distance from the center of the circle
✔✔Circumference - ✔✔The distance around a circle
✔✔Close nipple - ✔✔A nipple that is about twice the length of a standard thread and
threaded from end to end with no shoulder
✔✔Coffer dam - ✔✔A temporary dam constructed to divert or contain water.
✔✔Compaction - ✔✔The action of forcing small soil particles between larger ones until
most of the air space or voids and moisture have been squeezed out. The result is a
hard, solid, rocklike mass.
✔✔Competent person - ✔✔A person who is capable of identifying existing and
predictable hazards in the area or working conditions that are unsanitary, hazardous, or
dangerous to employees, and who has the authority to take prompt corrective measures
to fix the problem.
✔✔Compression collar - ✔✔A piece of hardware that uses compression force to
connect sections of polyethylene piping.
✔✔Compression strength - ✔✔The ability of soil to hold a heavy weight.
✔✔Concentric reducer - ✔✔A reducer that maintains the same center line between the
two pipes that it joins.
✔✔Condensate - ✔✔The liquid product of steam, caused by a loss in temperature or
pressure.
✔✔Control valve - ✔✔A globe valve automatically controlled to regulate flow through
the valve.
✔✔Corrosive - ✔✔Causing the gradual destruction of a substance by chemical action.
