PLUMBING EXAM #1 QUESTIONS AND
ANSWERS
Flexible - Answer-Rigid gas piping such as black steel can leak after a small
earthquake, while ______ tubing can absorb the shock and move with a structure
22-1/2 - Answer-A _____ degree fitting is designed for a drainage waste and vent
(DWV) system.
Male Adapter - Answer-It has external threads on one end and a socket connection on
the other end.
Female Adapter - Answer-It has internal threads on one end and a socket on the other
end.
wye - Answer-A ____has three connections and is named based on its similarity to the
letter Y.
Combo - Answer-_____is a trade name for a three-sided fitting that creates a long
radius 90 branch (side inlet) that is perpendicular to the run.
sanitary tee - Answer-A _______ ___ is a compact fitting with three connections used in
drainage and vent systems.
cleanout - Answer-A ______ is installed throughout a DWV system to provide access
into the piping system for clearing obstructions.
closet flange - Answer-A toilet is also known as a water closet, and the flange that
connects the toilet to the drainage system is called a ______ ______.
wax - Answer-A ____seal prevents harmful sewer gases from entering occupied areas
and seals the connection between the toilet and the closet flange.
P-trap - Answer-______: Every fixture must be served with a protective water seal to
prevent harmful sewer gas from entering an occupied space.
DWV - Answer-___ fittings have a flow pattern and plumbing codes dictate their use.
DWV - Answer-___ fittings are not designed for use with pressure piping systems.
Water - Answer-____ piping fittings have more compact design than DWV fittings.
Black - Answer-____ steel fittings cannot be installed in a potable water system.
, street - Answer-A ____ fitting design has one end that is the same outside diameter as
the connecting pipe.
hub - Answer-A fitting socket is also known as the ___.
isolation - Answer-Every residential dwelling is required by code to be provided with at
least one ______valve.
3/4" - Answer-Most codes dictate that the minimum size of a residential water service is
_____.
ball valve - Answer-Utilizes an internal ball with a hole in its center.
Gate valve - Answer-Utilizes a metal gate (disc) that slides vertically to open and close
the valve.
Stop - Answer-A valve design that uses a rubber washer to stop the flow of water; it is a
directional flow isolation valve
individual - Answer-A stop is more popular as an _______ fixture isolation valve.
stop and waste - Answer-A _____ _____ _____ valve uses the same design as a stop
valve to isolate an entire water distribution system, except that it also has a draining
feature
boiler drain - Answer-A hose outlet connection that is intended to drain storage tanks is
known as a ______ _____.
relief valve - Answer-Protecting a piping system and equipment from extreme
temperatures and pressures is the responsibility of a ____ _____.
Check valve - Answer-A backflow-prevention device.
Installed to ensure the water flows in one direction.
Porcelain - Answer-______ enameled surfaces must be capable of withstanding acid
without damaging the fixture.
tub - Answer-A standard ___in a home is 5-0" in length and averages 30" wide.
head - Answer-The drain location is typically on one end of the tub that is known as the
____wall
washing machine box - Answer-A _______ _____ ___ is used to provide hot water, cold
water, and a drain connection in one central location.
ANSWERS
Flexible - Answer-Rigid gas piping such as black steel can leak after a small
earthquake, while ______ tubing can absorb the shock and move with a structure
22-1/2 - Answer-A _____ degree fitting is designed for a drainage waste and vent
(DWV) system.
Male Adapter - Answer-It has external threads on one end and a socket connection on
the other end.
Female Adapter - Answer-It has internal threads on one end and a socket on the other
end.
wye - Answer-A ____has three connections and is named based on its similarity to the
letter Y.
Combo - Answer-_____is a trade name for a three-sided fitting that creates a long
radius 90 branch (side inlet) that is perpendicular to the run.
sanitary tee - Answer-A _______ ___ is a compact fitting with three connections used in
drainage and vent systems.
cleanout - Answer-A ______ is installed throughout a DWV system to provide access
into the piping system for clearing obstructions.
closet flange - Answer-A toilet is also known as a water closet, and the flange that
connects the toilet to the drainage system is called a ______ ______.
wax - Answer-A ____seal prevents harmful sewer gases from entering occupied areas
and seals the connection between the toilet and the closet flange.
P-trap - Answer-______: Every fixture must be served with a protective water seal to
prevent harmful sewer gas from entering an occupied space.
DWV - Answer-___ fittings have a flow pattern and plumbing codes dictate their use.
DWV - Answer-___ fittings are not designed for use with pressure piping systems.
Water - Answer-____ piping fittings have more compact design than DWV fittings.
Black - Answer-____ steel fittings cannot be installed in a potable water system.
, street - Answer-A ____ fitting design has one end that is the same outside diameter as
the connecting pipe.
hub - Answer-A fitting socket is also known as the ___.
isolation - Answer-Every residential dwelling is required by code to be provided with at
least one ______valve.
3/4" - Answer-Most codes dictate that the minimum size of a residential water service is
_____.
ball valve - Answer-Utilizes an internal ball with a hole in its center.
Gate valve - Answer-Utilizes a metal gate (disc) that slides vertically to open and close
the valve.
Stop - Answer-A valve design that uses a rubber washer to stop the flow of water; it is a
directional flow isolation valve
individual - Answer-A stop is more popular as an _______ fixture isolation valve.
stop and waste - Answer-A _____ _____ _____ valve uses the same design as a stop
valve to isolate an entire water distribution system, except that it also has a draining
feature
boiler drain - Answer-A hose outlet connection that is intended to drain storage tanks is
known as a ______ _____.
relief valve - Answer-Protecting a piping system and equipment from extreme
temperatures and pressures is the responsibility of a ____ _____.
Check valve - Answer-A backflow-prevention device.
Installed to ensure the water flows in one direction.
Porcelain - Answer-______ enameled surfaces must be capable of withstanding acid
without damaging the fixture.
tub - Answer-A standard ___in a home is 5-0" in length and averages 30" wide.
head - Answer-The drain location is typically on one end of the tub that is known as the
____wall
washing machine box - Answer-A _______ _____ ___ is used to provide hot water, cold
water, and a drain connection in one central location.
