NCCER PLUMBING LEVEL 1 ACTUAL EXAM
PAPER 2026 QUESTIONS AND SOLUTIONS
GRADED A PLUS
◉ Suggested national plumbing standards are called
Answer: Model codes
◉ Your supervisor points out that you forgot to complete a step in
the assembly of a drain in a DWV system. One of the apprentices that
you are supervising was a he person installing the drain. The
responsible action is to
Answer: Take responsibility for the work done under your
supervision
◉ People who develop, design, manufacture, and test mechanical
devices are called
Answer: Mechanical engineers
◉ Project managers are responsible for
Answer: Controlling the scope and direction of a plumbing business
, ◉ Which of the following does not cause backflow
Answer: Insufficient levels of water
◉ A type of cutter used for cutting small-diameter l, soft material
such as copper, brass, and aluminum tubing or thin-wall conduit is
Answer: Tube cutter
◉ To cut threads into galvanized and black-iron pipes, use
Answer: Dies
◉ A type of bit that will bore holes in wood quickly and is good for
drilling through floor joists and wall studs, and for drilling in hard to
reach areas is the
Answer: Self-feeding bit
◉ The distance that a pipe screws into a threaded fitting is called the
Answer: Thread makeup
◉ Plot plans usually show
Answer: Utility easements
◉ vertical and horizontal piping along with sizes and a riser number
that refers back to the full set of plumbing drawings are shown on
PAPER 2026 QUESTIONS AND SOLUTIONS
GRADED A PLUS
◉ Suggested national plumbing standards are called
Answer: Model codes
◉ Your supervisor points out that you forgot to complete a step in
the assembly of a drain in a DWV system. One of the apprentices that
you are supervising was a he person installing the drain. The
responsible action is to
Answer: Take responsibility for the work done under your
supervision
◉ People who develop, design, manufacture, and test mechanical
devices are called
Answer: Mechanical engineers
◉ Project managers are responsible for
Answer: Controlling the scope and direction of a plumbing business
, ◉ Which of the following does not cause backflow
Answer: Insufficient levels of water
◉ A type of cutter used for cutting small-diameter l, soft material
such as copper, brass, and aluminum tubing or thin-wall conduit is
Answer: Tube cutter
◉ To cut threads into galvanized and black-iron pipes, use
Answer: Dies
◉ A type of bit that will bore holes in wood quickly and is good for
drilling through floor joists and wall studs, and for drilling in hard to
reach areas is the
Answer: Self-feeding bit
◉ The distance that a pipe screws into a threaded fitting is called the
Answer: Thread makeup
◉ Plot plans usually show
Answer: Utility easements
◉ vertical and horizontal piping along with sizes and a riser number
that refers back to the full set of plumbing drawings are shown on
