Georgia Master Plumber Class I Exam
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following materials is approved for potable water
supply piping in Georgia?
a) PVC DWV
b) Copper
c) Cast iron
d) Lead
Copper is commonly approved for potable water systems due to its
durability and safety.
2. What is the minimum pipe size for a building drain in a single-
family dwelling?
a) 1½ inches
b) 3 inches
c) 4 inches
d) 2 inches
The Georgia Plumbing Code requires at least 3 inches for building
drains to handle waste flow from fixtures.
3. What is the required slope for a 2-inch horizontal drain pipe?
a) ¼ inch per foot
, b) ½ inch per foot
c) ¼ inch per foot minimum
d) 1 inch per foot
Horizontal drain piping must slope at least ¼ inch per foot for
proper drainage.
4. Which type of vent is permitted to serve as a stack vent?
a) Relief vent
b) A vertical drain that extends above the highest fixture served
c) Circuit vent
d) Main vent only
A stack vent extends through the roof and vents the drainage
stack.
5. A water heater’s temperature and pressure relief valve must
discharge to:
a) Any convenient location
b) A safe, conspicuous place outside the building or to a drain
c) The floor
d) The sewer line
Georgia code requires a T&P relief valve discharge to prevent
scalding or pressure damage.
6. What is the minimum distance a water service line must be buried
below frost line in Georgia?
a) 12 inches
b) 18 inches
c) 24 inches
d) 36 inches
, Water service lines must be below the frost line to prevent
freezing.
7. How is the sizing of a residential water supply system determined?
a) By pipe length only
b) By fixture unit demand and pipe length
c) By water pressure only
d) By number of bathrooms only
Fixture units and pipe length are used to calculate proper pipe
sizing for adequate flow.
8. What is the maximum allowable distance for a trap arm to a vent
for a 1½-inch pipe?
a) 2 feet
b) 3 feet
c) 5 feet
d) 6 feet
The plumbing code limits trap arm length to prevent siphoning of
the trap seal.
9. What type of fitting is required to connect dissimilar metals in
plumbing?
a) Copper tee
b) Dielectric union
c) PVC coupling
d) Brass compression
A dielectric union prevents galvanic corrosion between different
metals.
10. Which method is approved for joining PVC pipe?
a) Solvent cement
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following materials is approved for potable water
supply piping in Georgia?
a) PVC DWV
b) Copper
c) Cast iron
d) Lead
Copper is commonly approved for potable water systems due to its
durability and safety.
2. What is the minimum pipe size for a building drain in a single-
family dwelling?
a) 1½ inches
b) 3 inches
c) 4 inches
d) 2 inches
The Georgia Plumbing Code requires at least 3 inches for building
drains to handle waste flow from fixtures.
3. What is the required slope for a 2-inch horizontal drain pipe?
a) ¼ inch per foot
, b) ½ inch per foot
c) ¼ inch per foot minimum
d) 1 inch per foot
Horizontal drain piping must slope at least ¼ inch per foot for
proper drainage.
4. Which type of vent is permitted to serve as a stack vent?
a) Relief vent
b) A vertical drain that extends above the highest fixture served
c) Circuit vent
d) Main vent only
A stack vent extends through the roof and vents the drainage
stack.
5. A water heater’s temperature and pressure relief valve must
discharge to:
a) Any convenient location
b) A safe, conspicuous place outside the building or to a drain
c) The floor
d) The sewer line
Georgia code requires a T&P relief valve discharge to prevent
scalding or pressure damage.
6. What is the minimum distance a water service line must be buried
below frost line in Georgia?
a) 12 inches
b) 18 inches
c) 24 inches
d) 36 inches
, Water service lines must be below the frost line to prevent
freezing.
7. How is the sizing of a residential water supply system determined?
a) By pipe length only
b) By fixture unit demand and pipe length
c) By water pressure only
d) By number of bathrooms only
Fixture units and pipe length are used to calculate proper pipe
sizing for adequate flow.
8. What is the maximum allowable distance for a trap arm to a vent
for a 1½-inch pipe?
a) 2 feet
b) 3 feet
c) 5 feet
d) 6 feet
The plumbing code limits trap arm length to prevent siphoning of
the trap seal.
9. What type of fitting is required to connect dissimilar metals in
plumbing?
a) Copper tee
b) Dielectric union
c) PVC coupling
d) Brass compression
A dielectric union prevents galvanic corrosion between different
metals.
10. Which method is approved for joining PVC pipe?
a) Solvent cement
