Florida Plumber Licensing Exam With
Actual Questions & Verified
Answers,Plus Rationales/Expert
Verified For Guaranteed Pass Graded
A+/2026 /Latest Update/Instant
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1. What is the minimum slope required for a horizontal drain pipe 3 inches
in diameter?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
B. 1/8 inch per foot
The Florida Plumbing Code requires a minimum slope of 1/8 inch per
foot for 3-inch horizontal drain pipes to ensure proper drainage.
2. Which type of pipe is commonly used for residential water supply lines?
A. PVC
B. PEX
C. Cast iron
D. Galvanized steel
B. PEX
PEX is flexible, easy to install, and resistant to corrosion, making it
common in residential water supply systems.
3. What is the maximum distance a water heater can be from a sink
without requiring a branch supply line according to Florida code?
A. 10 feet
, B. 25 feet
C. 50 feet
D. 75 feet
C. 50 feet
Florida code allows a maximum of 50 feet from a water heater to a
fixture before additional branch supply lines are required to maintain
pressure and temperature.
4. Which type of vent is required for a plumbing trap under the Florida
Plumbing Code?
A. Individual vent
B. Loop vent
C. Common vent
D. Any of the above
D. Any of the above
Traps can be vented by individual, loop, or common vents as long as
they meet code requirements for proper venting.
5. The minimum water service pipe size for a single-family residence is:
A. 3/4 inch
B. 1 inch
C. 1 1/4 inch
D. 1 1/2 inch
A. 3/4 inch
A minimum 3/4-inch water service is required for a single-family home
to supply adequate flow and pressure.
6. Which fixture requires a trap?
A. Kitchen sink
B. Floor drain
C. Lavatory
D. All of the above
D. All of the above
All plumbing fixtures must have a trap to prevent sewer gases from
entering the building.
, 7. What is the minimum trap arm length for a 2-inch drain line?
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
C. 5 feet
The Florida Plumbing Code sets maximum and minimum trap arm
lengths depending on pipe diameter; for 2-inch drains, the minimum is
typically 5 feet.
8. Which material is commonly used for underground sanitary sewer
piping?
A. Copper
B. Cast iron
C. PVC
D. PEX
C. PVC
PVC is durable, corrosion-resistant, and widely used for underground
sanitary sewer lines.
9. What is the purpose of a water hammer arrestor?
A. Increase water pressure
B. Prevent backflow
C. Reduce water noise from pressure surges
D. Filter water
C. Reduce water noise from pressure surges
Water hammer arrestors absorb sudden surges in water pressure,
preventing pipe damage and noise.
10.Which type of valve is typically used to shut off water to a single fixture?
A. Gate valve
B. Ball valve
C. Globe valve
D. Angle stop
D. Angle stop
Angle stops are installed at individual fixtures for easy shut-off without
affecting the entire system.
Actual Questions & Verified
Answers,Plus Rationales/Expert
Verified For Guaranteed Pass Graded
A+/2026 /Latest Update/Instant
Download Pdf
1. What is the minimum slope required for a horizontal drain pipe 3 inches
in diameter?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
B. 1/8 inch per foot
The Florida Plumbing Code requires a minimum slope of 1/8 inch per
foot for 3-inch horizontal drain pipes to ensure proper drainage.
2. Which type of pipe is commonly used for residential water supply lines?
A. PVC
B. PEX
C. Cast iron
D. Galvanized steel
B. PEX
PEX is flexible, easy to install, and resistant to corrosion, making it
common in residential water supply systems.
3. What is the maximum distance a water heater can be from a sink
without requiring a branch supply line according to Florida code?
A. 10 feet
, B. 25 feet
C. 50 feet
D. 75 feet
C. 50 feet
Florida code allows a maximum of 50 feet from a water heater to a
fixture before additional branch supply lines are required to maintain
pressure and temperature.
4. Which type of vent is required for a plumbing trap under the Florida
Plumbing Code?
A. Individual vent
B. Loop vent
C. Common vent
D. Any of the above
D. Any of the above
Traps can be vented by individual, loop, or common vents as long as
they meet code requirements for proper venting.
5. The minimum water service pipe size for a single-family residence is:
A. 3/4 inch
B. 1 inch
C. 1 1/4 inch
D. 1 1/2 inch
A. 3/4 inch
A minimum 3/4-inch water service is required for a single-family home
to supply adequate flow and pressure.
6. Which fixture requires a trap?
A. Kitchen sink
B. Floor drain
C. Lavatory
D. All of the above
D. All of the above
All plumbing fixtures must have a trap to prevent sewer gases from
entering the building.
, 7. What is the minimum trap arm length for a 2-inch drain line?
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
C. 5 feet
The Florida Plumbing Code sets maximum and minimum trap arm
lengths depending on pipe diameter; for 2-inch drains, the minimum is
typically 5 feet.
8. Which material is commonly used for underground sanitary sewer
piping?
A. Copper
B. Cast iron
C. PVC
D. PEX
C. PVC
PVC is durable, corrosion-resistant, and widely used for underground
sanitary sewer lines.
9. What is the purpose of a water hammer arrestor?
A. Increase water pressure
B. Prevent backflow
C. Reduce water noise from pressure surges
D. Filter water
C. Reduce water noise from pressure surges
Water hammer arrestors absorb sudden surges in water pressure,
preventing pipe damage and noise.
10.Which type of valve is typically used to shut off water to a single fixture?
A. Gate valve
B. Ball valve
C. Globe valve
D. Angle stop
D. Angle stop
Angle stops are installed at individual fixtures for easy shut-off without
affecting the entire system.
