MASTER PLUMBING 2026 TEST PAPER QUESTIONS AND
SOLUTIONS RATED A+
✔✔Horizontal drains shall have cleanouts not more than ______ feet apart. - ✔✔100
✔✔Standpipes shall extend a maximum of ____ inches above the trap weir. - ✔✔42
✔✔Shower compartments shall not be less than _____ inches in minimum dimension. -
✔✔30
✔✔Shower liners shall be sloped at _____ towards the drain. - ✔✔2.0%
✔✔A water closet shall have not less than ____ inches from its centerline to any side
wall. - ✔✔15"
✔✔Which of the following tools would cut 20 year old CPVC the best? - ✔✔hacksaw
✔✔Which of the following people is ultimately responsible for making sure permits are
on the job? - ✔✔master plumber
✔✔Which of the following is best defines as a plumbing system that performs in
accordance with the intent of chapters 3-12 of the IPC? - ✔✔alternative engineered
design
✔✔Which of the following best defines the combination of fixtures consisting of a water
closet, lavatory and bathtub of shower? - ✔✔bathroom group
✔✔Which one of the following definitions best refers to that part of the drainage system
that extends from the end of the building drain and conveys the discharge to a public
sewer? - ✔✔Building sewer
✔✔When preparing to work in a large underground meter vault, which one of the
following principles should be given priority? - ✔✔confined space entry
✔✔If a serious accident occurs on your jobsite that causes another person to become
unconscious and not breathing, you should be prepared to ____________ immediately.
- ✔✔administer CPR
✔✔When performing any significant excavation activity, it is most important to assure
that which of the following is present on site? - ✔✔competent person
✔✔Which of the following tools would be the best one to remove supply tubes from a
faucet on an existing wall hung sink? - ✔✔basin wrench
, ✔✔Which of the following should you have on your person when operating a turbo
torch? - ✔✔safety goggles
✔✔Which of the following should you have close-at-hand when operating a turbo torch?
- ✔✔fire extinguisher
✔✔Which of the following is best for removing the shavings on the end of a piece of
PVC after cutting it? - ✔✔deburring tool
✔✔There shall be at least ____ inches from the front of a toilet to a wall, fixture or door/
- ✔✔21"
✔✔Vertical 3/4 copper piping shall have hangers a minimum of every ____ feet - ✔✔10'
✔✔Piping installed in wall framing less that ____ inches from the nearest edge shall be
protected by shield plates. - ✔✔1.5
✔✔According to thee WSSC PFGC, when replacing less than _____ percent of the
sewer under the slab of a home, a permit is not required. - ✔✔10'
✔✔A column of water open at the top and filled up with 40 feet exerts a pressure of how
much at the bottom? - ✔✔17.3 PSI
✔✔Barometric loops shall be no less than ____ feet tall. - ✔✔35
✔✔All water service pipe or tubing shall have a minimum working pressure rating of
____ PSI. - ✔✔160
✔✔The ASSE standard reference number for water hammer arrestors is? - ✔✔1010-98
✔✔Traps shall have a liquid seal of not less than ___ inches - ✔✔2"
✔✔An 8 inch sewer requires a cleanout not less than ____ inches in diameter. - ✔✔4
✔✔Cleanouts shall be installed on sewers where the direction changes by greater than
_____ degrees. - ✔✔45
✔✔A vent going up through a rooftop deck of partio shall extend ___ feet above the
roof. - ✔✔7
✔✔Vent piping shall be no smaller than ___ inches - ✔✔1 1/4
SOLUTIONS RATED A+
✔✔Horizontal drains shall have cleanouts not more than ______ feet apart. - ✔✔100
✔✔Standpipes shall extend a maximum of ____ inches above the trap weir. - ✔✔42
✔✔Shower compartments shall not be less than _____ inches in minimum dimension. -
✔✔30
✔✔Shower liners shall be sloped at _____ towards the drain. - ✔✔2.0%
✔✔A water closet shall have not less than ____ inches from its centerline to any side
wall. - ✔✔15"
✔✔Which of the following tools would cut 20 year old CPVC the best? - ✔✔hacksaw
✔✔Which of the following people is ultimately responsible for making sure permits are
on the job? - ✔✔master plumber
✔✔Which of the following is best defines as a plumbing system that performs in
accordance with the intent of chapters 3-12 of the IPC? - ✔✔alternative engineered
design
✔✔Which of the following best defines the combination of fixtures consisting of a water
closet, lavatory and bathtub of shower? - ✔✔bathroom group
✔✔Which one of the following definitions best refers to that part of the drainage system
that extends from the end of the building drain and conveys the discharge to a public
sewer? - ✔✔Building sewer
✔✔When preparing to work in a large underground meter vault, which one of the
following principles should be given priority? - ✔✔confined space entry
✔✔If a serious accident occurs on your jobsite that causes another person to become
unconscious and not breathing, you should be prepared to ____________ immediately.
- ✔✔administer CPR
✔✔When performing any significant excavation activity, it is most important to assure
that which of the following is present on site? - ✔✔competent person
✔✔Which of the following tools would be the best one to remove supply tubes from a
faucet on an existing wall hung sink? - ✔✔basin wrench
, ✔✔Which of the following should you have on your person when operating a turbo
torch? - ✔✔safety goggles
✔✔Which of the following should you have close-at-hand when operating a turbo torch?
- ✔✔fire extinguisher
✔✔Which of the following is best for removing the shavings on the end of a piece of
PVC after cutting it? - ✔✔deburring tool
✔✔There shall be at least ____ inches from the front of a toilet to a wall, fixture or door/
- ✔✔21"
✔✔Vertical 3/4 copper piping shall have hangers a minimum of every ____ feet - ✔✔10'
✔✔Piping installed in wall framing less that ____ inches from the nearest edge shall be
protected by shield plates. - ✔✔1.5
✔✔According to thee WSSC PFGC, when replacing less than _____ percent of the
sewer under the slab of a home, a permit is not required. - ✔✔10'
✔✔A column of water open at the top and filled up with 40 feet exerts a pressure of how
much at the bottom? - ✔✔17.3 PSI
✔✔Barometric loops shall be no less than ____ feet tall. - ✔✔35
✔✔All water service pipe or tubing shall have a minimum working pressure rating of
____ PSI. - ✔✔160
✔✔The ASSE standard reference number for water hammer arrestors is? - ✔✔1010-98
✔✔Traps shall have a liquid seal of not less than ___ inches - ✔✔2"
✔✔An 8 inch sewer requires a cleanout not less than ____ inches in diameter. - ✔✔4
✔✔Cleanouts shall be installed on sewers where the direction changes by greater than
_____ degrees. - ✔✔45
✔✔A vent going up through a rooftop deck of partio shall extend ___ feet above the
roof. - ✔✔7
✔✔Vent piping shall be no smaller than ___ inches - ✔✔1 1/4
