NCCER PLUMBING LEVEL 1
COMPREHENSIVE TRADE TEST 2026
COMPLETE QUESTIONS AND ANSWERS
◉ Which kind of fitting connects pipes or different sizes
Answer: Reducers
◉ During construction, plastic pipe should normally be stored
outside under tarps in order to protect it from
Answer: Ultraviolet light
◉ When measuring plastic pipe before cutting you must take into
account all of the following except
Answer: Pipe diameter
◉ Before assembling plastic pipe joints involving gaskets, such as
ring-tight gasket fittings, you should
Answer: Bevel the spigot end of the pipe
◉ What is a major concern when joining PVC and CPVC pipe when
working in hot temperatures
Answer: Cement drying
, ◉ Which is fathers following should you avoid when assembling
bell-and-spigot plastic drain pipe?
Answer: Stabbing or swing pipe sections together
◉ Because it high temperature and chemicals, you cannot use
solvent cement or heat fusion when joining pipe made from
Answer: Pex
◉ Solvent welding does t work for this material, so you must use
heat fusion or mechanical joints and clamps when joining.
Answer: PE
◉ In general, PVC pipes should be supported at a maximum intervals
of
Answer: 4 feet
◉ The most commonly used clamps used as vertical support for pipe
and tubing are
Answer: Pipe riser clamp
◉ To avoid possible damage to the pipes from freezing during sub
freezing temperatures, water should be blown out of the pipe lines
COMPREHENSIVE TRADE TEST 2026
COMPLETE QUESTIONS AND ANSWERS
◉ Which kind of fitting connects pipes or different sizes
Answer: Reducers
◉ During construction, plastic pipe should normally be stored
outside under tarps in order to protect it from
Answer: Ultraviolet light
◉ When measuring plastic pipe before cutting you must take into
account all of the following except
Answer: Pipe diameter
◉ Before assembling plastic pipe joints involving gaskets, such as
ring-tight gasket fittings, you should
Answer: Bevel the spigot end of the pipe
◉ What is a major concern when joining PVC and CPVC pipe when
working in hot temperatures
Answer: Cement drying
, ◉ Which is fathers following should you avoid when assembling
bell-and-spigot plastic drain pipe?
Answer: Stabbing or swing pipe sections together
◉ Because it high temperature and chemicals, you cannot use
solvent cement or heat fusion when joining pipe made from
Answer: Pex
◉ Solvent welding does t work for this material, so you must use
heat fusion or mechanical joints and clamps when joining.
Answer: PE
◉ In general, PVC pipes should be supported at a maximum intervals
of
Answer: 4 feet
◉ The most commonly used clamps used as vertical support for pipe
and tubing are
Answer: Pipe riser clamp
◉ To avoid possible damage to the pipes from freezing during sub
freezing temperatures, water should be blown out of the pipe lines
