MASTER PLUMBING WSSC QUESTIONS WITH COMPLETE
SOLUTIONS 100% VERIFIED GRADED A+ 2026 UPDATE!!
Waste water discharged into the building drainage system shall not be over _______ *F - (answer)140
A water tank holds 50 gallons of water. How much does the 50 gallons of water weigh? - (answer)417 lbs
Exterior walls may be notched to a depth exceeding _______________ percent of its width. - (answer)25
According to the WSSC PFGC, a full flow building water service valve shall be installed within _____ feet
of where the water service enters the building. - (answer)3'
According to the WSSC PFGC, water meters installed inside of buildings shall be located in an area
capable of maintaining _____ *F. - (answer)50
In Prince George and Montgomery County, water service piping shall be not less than _____ inches
below grade. - (answer)30
A cylindrical tank is 22 inches in diameter and 5 feet tall. How many gallons of water will it hold? -
(answer)98
The best method of backflow protection is an? - (answer)Air-gap
Horizontal drainage piping 4 inches in diameter shall have a minimum slope of _____ per foot. -
(answer)1/8
Water hammer arrestors shall conform to ASSE _______ - (answer)1010
A connection between a vent pipe and a vent stack or stack vent shall be at least _____ inches above the
flood level rim of the highest fixture served by the vent. - (answer)6 inches
, MASTER PLUMBING WSSC QUESTIONS WITH COMPLETE
SOLUTIONS 100% VERIFIED GRADED A+ 2026 UPDATE!!
Air admittance valves shall be installed a minimum of ______ inches above insulation materials. -
(answer)6
A water supply system test done with air shall be at not less than ____ PSI. - (answer)50
If you install 80 feet of sewer at 1/4" per foot how many inches of fall in the run? - (answer)20
The minimum size water supply pipe to a bidet shall be _____ inch. - (answer)3/8
Horizontal drains shall have cleanouts not more than ______ feet apart. - (answer)100
Standpipes shall extend a maximum of ____ inches above the trap weir. - (answer)42
Shower compartments shall not be less than _____ inches in minimum dimension. - (answer)30
Shower liners shall be sloped at _____ towards the drain. - (answer)2.0%
A water closet shall have not less than ____ inches from its centerline to any side wall. - (answer)15"
Which of the following tools would cut 20 year old CPVC the best? - (answer)hacksaw
Which of the following people is ultimately responsible for making sure permits are on the job? -
(answer)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? - (answer)alternative engineered design
SOLUTIONS 100% VERIFIED GRADED A+ 2026 UPDATE!!
Waste water discharged into the building drainage system shall not be over _______ *F - (answer)140
A water tank holds 50 gallons of water. How much does the 50 gallons of water weigh? - (answer)417 lbs
Exterior walls may be notched to a depth exceeding _______________ percent of its width. - (answer)25
According to the WSSC PFGC, a full flow building water service valve shall be installed within _____ feet
of where the water service enters the building. - (answer)3'
According to the WSSC PFGC, water meters installed inside of buildings shall be located in an area
capable of maintaining _____ *F. - (answer)50
In Prince George and Montgomery County, water service piping shall be not less than _____ inches
below grade. - (answer)30
A cylindrical tank is 22 inches in diameter and 5 feet tall. How many gallons of water will it hold? -
(answer)98
The best method of backflow protection is an? - (answer)Air-gap
Horizontal drainage piping 4 inches in diameter shall have a minimum slope of _____ per foot. -
(answer)1/8
Water hammer arrestors shall conform to ASSE _______ - (answer)1010
A connection between a vent pipe and a vent stack or stack vent shall be at least _____ inches above the
flood level rim of the highest fixture served by the vent. - (answer)6 inches
, MASTER PLUMBING WSSC QUESTIONS WITH COMPLETE
SOLUTIONS 100% VERIFIED GRADED A+ 2026 UPDATE!!
Air admittance valves shall be installed a minimum of ______ inches above insulation materials. -
(answer)6
A water supply system test done with air shall be at not less than ____ PSI. - (answer)50
If you install 80 feet of sewer at 1/4" per foot how many inches of fall in the run? - (answer)20
The minimum size water supply pipe to a bidet shall be _____ inch. - (answer)3/8
Horizontal drains shall have cleanouts not more than ______ feet apart. - (answer)100
Standpipes shall extend a maximum of ____ inches above the trap weir. - (answer)42
Shower compartments shall not be less than _____ inches in minimum dimension. - (answer)30
Shower liners shall be sloped at _____ towards the drain. - (answer)2.0%
A water closet shall have not less than ____ inches from its centerline to any side wall. - (answer)15"
Which of the following tools would cut 20 year old CPVC the best? - (answer)hacksaw
Which of the following people is ultimately responsible for making sure permits are on the job? -
(answer)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? - (answer)alternative engineered design
