Nova Scotia Journeyperson Plumber
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the minimum slope required for a horizontal 2-inch
drainage pipe?
a) 1/8 inch per foot
b) 1/4 inch per foot
c) 1/2 inch per foot
d) 1 inch per foot
Pipes must be sloped to allow proper drainage; 1/2 inch per foot is
standard for a 2-inch drain.
2. What type of valve is typically used to prevent backflow in a
potable water system?
a) Ball valve
b) Gate valve
c) Check valve
d) Globe valve
A check valve allows water to flow in one direction only, preventing
contamination.
3. When soldering copper pipe, flux is applied to:
a) The inside of the pipe only
b) Both the inside of the fitting and the outside of the pipe
c) The outside of the pipe only
,d) The outside of the fitting only
Flux removes oxidation and helps solder flow into the joint.
4. What is the primary purpose of a vent in a plumbing system?
a) To supply water
b) To allow air to enter and prevent siphoning of traps
c) To increase water pressure
d) To filter debris
Vents maintain proper pressure in drain pipes and prevent trap
siphoning.
5. What is the typical working pressure for a residential water supply
line?
a) 20–30 psi
b) 40–60 psi
c) 70–90 psi
d) 100–120 psi
Most homes are designed for 40–60 psi for safe operation.
6. Which material is commonly used for underground cold water
supply in Nova Scotia?
a) CPVC
b) Polyethylene (PE) or PEX
c) Galvanized steel
d) PVC DWV
PE or PEX is flexible and corrosion-resistant, making it suitable for
underground use.
7. What type of fitting is used to connect two pipes of different
diameters?
a) Elbow
, b) Tee
c) Reducer
d) Coupling
A reducer transitions between pipe sizes.
8. What is the primary reason for using dielectric unions between
dissimilar metals?
a) Easier installation
b) Increase flow rate
c) Prevent galvanic corrosion
d) Reduce vibration
Dielectric unions isolate metals like copper and steel to prevent
corrosion.
9. Which of the following is a sign of a water leak in a pressurized
system?
a) Rusted pipe
b) Discolored water
c) Pressure drop in the system
d) Low water hardness
A drop in pressure usually indicates a leak.
10. What is the maximum distance a fixture trap can be from the vent
connection in a standard plumbing system?
a) 2 feet
b) 3 feet
c) 5 feet
d) 10 feet
Local codes limit trap-to-vent distances to ensure proper venting.
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the minimum slope required for a horizontal 2-inch
drainage pipe?
a) 1/8 inch per foot
b) 1/4 inch per foot
c) 1/2 inch per foot
d) 1 inch per foot
Pipes must be sloped to allow proper drainage; 1/2 inch per foot is
standard for a 2-inch drain.
2. What type of valve is typically used to prevent backflow in a
potable water system?
a) Ball valve
b) Gate valve
c) Check valve
d) Globe valve
A check valve allows water to flow in one direction only, preventing
contamination.
3. When soldering copper pipe, flux is applied to:
a) The inside of the pipe only
b) Both the inside of the fitting and the outside of the pipe
c) The outside of the pipe only
,d) The outside of the fitting only
Flux removes oxidation and helps solder flow into the joint.
4. What is the primary purpose of a vent in a plumbing system?
a) To supply water
b) To allow air to enter and prevent siphoning of traps
c) To increase water pressure
d) To filter debris
Vents maintain proper pressure in drain pipes and prevent trap
siphoning.
5. What is the typical working pressure for a residential water supply
line?
a) 20–30 psi
b) 40–60 psi
c) 70–90 psi
d) 100–120 psi
Most homes are designed for 40–60 psi for safe operation.
6. Which material is commonly used for underground cold water
supply in Nova Scotia?
a) CPVC
b) Polyethylene (PE) or PEX
c) Galvanized steel
d) PVC DWV
PE or PEX is flexible and corrosion-resistant, making it suitable for
underground use.
7. What type of fitting is used to connect two pipes of different
diameters?
a) Elbow
, b) Tee
c) Reducer
d) Coupling
A reducer transitions between pipe sizes.
8. What is the primary reason for using dielectric unions between
dissimilar metals?
a) Easier installation
b) Increase flow rate
c) Prevent galvanic corrosion
d) Reduce vibration
Dielectric unions isolate metals like copper and steel to prevent
corrosion.
9. Which of the following is a sign of a water leak in a pressurized
system?
a) Rusted pipe
b) Discolored water
c) Pressure drop in the system
d) Low water hardness
A drop in pressure usually indicates a leak.
10. What is the maximum distance a fixture trap can be from the vent
connection in a standard plumbing system?
a) 2 feet
b) 3 feet
c) 5 feet
d) 10 feet
Local codes limit trap-to-vent distances to ensure proper venting.
