Arizona plumbing exam C-37 (set 5) Questions and Answers Fully Solved Latest 2025-2026
Given: A water service pipe is to be installed in a trench with a sewer
pipe. What minimum vertical distance is required between the bottom
the water service pipe and the top of the sewer pipe? - Answers 12 inches
A 3 bedroom house has more than 21 fixtures, what size of septic tank
required? - Answers 1,250 gallons
14 inches of water in a water column has what pressure? - Answers .504 PSI
A relief valve shall be installed? - Answers vertically in the uppermost position.
The maximum width of a trench for a septic system system is? - Answers 36 inches
Hospitals are classified as what type of hazard occupancy? - Answers Light hazard occupancy
In the regeneration process of a water softener, what happens? - Answers The resin bead is stripped of
the calcium and magnesium ions and replaced by sodium ions.
1-1/2 in. horizontal copper tubing shall be supported at: - Answers 10 ft. Intervals
Vacuum breakers shall be installed a minimum of ______ above the flood level rim of the fixture or
device. - Answers 6 inches
Given: three (3) lavatories are connected to one trap. According to the code, what is minimum size of
this trap? - Answers 2 inch
An 8 inch sewer that has a 1/8 inch per foot slope is approved for what maximum drainage fixture unit
load? - Answers 1,600
What is the PSI setting from the factory of a temperature/pressure valve in a hot water heater? -
Answers 150 psi
A septic seepage pit shall be excavated______deeper than the proposed pit depth to verify underlying
soil characteristics. - Answers 5 feet
What is the name for the exterior drainage pipe that carries storm water from the roof drain systems? -
Answers leader
A 4 inch cleanout is located at the bottom of a vent and waste vertical
stack and is then connected to the building sewer. There are no offsets.
The next required cleanout shall be located within _______ of the building drain and building sewer
connection. - Answers 10 feet
Given: A water service pipe is to be installed in a trench with a sewer
pipe. What minimum vertical distance is required between the bottom
the water service pipe and the top of the sewer pipe? - Answers 12 inches
A 3 bedroom house has more than 21 fixtures, what size of septic tank
required? - Answers 1,250 gallons
14 inches of water in a water column has what pressure? - Answers .504 PSI
A relief valve shall be installed? - Answers vertically in the uppermost position.
The maximum width of a trench for a septic system system is? - Answers 36 inches
Hospitals are classified as what type of hazard occupancy? - Answers Light hazard occupancy
In the regeneration process of a water softener, what happens? - Answers The resin bead is stripped of
the calcium and magnesium ions and replaced by sodium ions.
1-1/2 in. horizontal copper tubing shall be supported at: - Answers 10 ft. Intervals
Vacuum breakers shall be installed a minimum of ______ above the flood level rim of the fixture or
device. - Answers 6 inches
Given: three (3) lavatories are connected to one trap. According to the code, what is minimum size of
this trap? - Answers 2 inch
An 8 inch sewer that has a 1/8 inch per foot slope is approved for what maximum drainage fixture unit
load? - Answers 1,600
What is the PSI setting from the factory of a temperature/pressure valve in a hot water heater? -
Answers 150 psi
A septic seepage pit shall be excavated______deeper than the proposed pit depth to verify underlying
soil characteristics. - Answers 5 feet
What is the name for the exterior drainage pipe that carries storm water from the roof drain systems? -
Answers leader
A 4 inch cleanout is located at the bottom of a vent and waste vertical
stack and is then connected to the building sewer. There are no offsets.
The next required cleanout shall be located within _______ of the building drain and building sewer
connection. - Answers 10 feet
