Manitoba Journeyperson Plumber Certification
Practice Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
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1. The primary purpose of a plumbing vent is to
A. Increase water pressure
B. Prevent trap siphonage
C. Improve drainage speed
D. Reduce pipe corrosion
Answer: B
Rationale: Venting equalizes air pressure in the drainage system to
protect trap seals from siphoning.
2. What is the minimum slope required for a 3-inch horizontal
drainage pipe under Manitoba code?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Answer: C
Rationale: Pipes 3 inches or smaller require a minimum slope of 1/4 inch
per foot.
3. Which fitting is best used when changing direction in a horizontal
drainage line?
, A. Tee
B. Long sweep 90
C. Close nipple
D. Coupling
Answer: B
Rationale: Long sweep fittings reduce turbulence and blockage risk in
drainage systems.
4. A trap seal is maintained primarily by
A. Pipe diameter
B. Water pressure
C. Standing water
D. Vent stack height
Answer: C
Rationale: The water retained in the trap forms a seal preventing sewer
gases from entering.
5. What type of valve is required on a water heater cold-water
supply?
A. Check valve
B. Pressure relief valve
C. Shut-off valve
D. Mixing valve
Answer: C
Rationale: A shut-off valve is required to allow isolation of the water
heater.
6. Which material is commonly prohibited for potable water supply
in Manitoba?
, A. Copper
B. PEX
C. CPVC
D. Galvanized steel
Answer: D
Rationale: Galvanized steel is restricted due to corrosion and health
concerns.
7. The purpose of a backwater valve is to
A. Prevent siphonage
B. Stop sewer backup
C. Increase flow
D. Reduce noise
Answer: B
Rationale: Backwater valves prevent sewage from flowing back into a
building.
8. What is the minimum required air gap for a residential
dishwasher?
A. 6 mm
B. 12 mm
C. 25 mm
D. 50 mm
Answer: C
Rationale: An air gap of at least 25 mm prevents backflow
contamination.
9. A cleanout must be installed
A. At every fixture
Practice Exam Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. The primary purpose of a plumbing vent is to
A. Increase water pressure
B. Prevent trap siphonage
C. Improve drainage speed
D. Reduce pipe corrosion
Answer: B
Rationale: Venting equalizes air pressure in the drainage system to
protect trap seals from siphoning.
2. What is the minimum slope required for a 3-inch horizontal
drainage pipe under Manitoba code?
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
Answer: C
Rationale: Pipes 3 inches or smaller require a minimum slope of 1/4 inch
per foot.
3. Which fitting is best used when changing direction in a horizontal
drainage line?
, A. Tee
B. Long sweep 90
C. Close nipple
D. Coupling
Answer: B
Rationale: Long sweep fittings reduce turbulence and blockage risk in
drainage systems.
4. A trap seal is maintained primarily by
A. Pipe diameter
B. Water pressure
C. Standing water
D. Vent stack height
Answer: C
Rationale: The water retained in the trap forms a seal preventing sewer
gases from entering.
5. What type of valve is required on a water heater cold-water
supply?
A. Check valve
B. Pressure relief valve
C. Shut-off valve
D. Mixing valve
Answer: C
Rationale: A shut-off valve is required to allow isolation of the water
heater.
6. Which material is commonly prohibited for potable water supply
in Manitoba?
, A. Copper
B. PEX
C. CPVC
D. Galvanized steel
Answer: D
Rationale: Galvanized steel is restricted due to corrosion and health
concerns.
7. The purpose of a backwater valve is to
A. Prevent siphonage
B. Stop sewer backup
C. Increase flow
D. Reduce noise
Answer: B
Rationale: Backwater valves prevent sewage from flowing back into a
building.
8. What is the minimum required air gap for a residential
dishwasher?
A. 6 mm
B. 12 mm
C. 25 mm
D. 50 mm
Answer: C
Rationale: An air gap of at least 25 mm prevents backflow
contamination.
9. A cleanout must be installed
A. At every fixture
