ALBERTA PLUMBER APPRENTICESHIP
Certification Exam (Second Period) Practice
(Questions and Correct Answers (Verified
Answers) Plus Rationales 2026
1. Copper tube type L is identified by what color?
A. Yellow
B. Blue
C. Red
D. Green
Type L copper is marked with blue for medium-duty use.
2. Which fitting is used to join three sections of pipe at 90° angles?
A. Tee-wye
B. Wye
C. Coupling
D. Tee
A tee fitting connects one branch at 90° to the run.
3. A backwater valve is installed to protect against:
A. Low pressure
B. High pressure
C. Sewer backup
D. Pipe collapse
Backwater valves stop sewage from flowing back into a building.
,4. The minimum slope for a 3-inch horizontal drainage pipe is:
A. 1%
B. 2%
C. 0%
D. 5%
3 in. pipe requires 1:50 slope = 2%.
5. Solder used for potable water must not contain:
A. Tin
B. Copper
C. Lead
D. Silver
Potable water joints must use lead-free solder for health and code
compliance.
6. Which device prevents siphonage?
A. Gate valve
B. Pressure gauge
C. Air admittance valve
D. Ball valve
AAVs let air enter to balance pressure and prevent siphonage.
7. What is the name of the vertical pipe that carries wastewater to the
building drain?
A. Branch line
B. Soil stack
C. Vent stack
D. Leader
A soil stack conveys waste vertically.
8. The maximum vertical distance from trap weir to vent is known as:
A. Vent rise
B. Trap arm length
C. Stack offset
, D. Fixture tailpiece
Trap arm length determines vent effectiveness.
9. What tool is used to cut cast iron pipe?
A. Copper cutter
B. Chain cutter
C. PVC saw
D. Threader
Chain cutters snap cast iron cleanly and safely.
10. A pressure-reducing valve is used to:
A. Increase flow
B. Stop air in lines
C. Maintain safe pressure
D. Measure pressure
PRVs regulate high supply pressure to safe building levels.
11. What determines fixture unit values?
A. Temperature
B. Probability of use and flow demand
C. Pipe material
D. Elevation
Fixture unit ratings estimate load based on usage frequency and discharge.
12. The main advantage of PEX piping is:
A. Cannot freeze
B. Flexibility and ease of installation
C. Higher pressure rating
D. Requires no fittings
PEX bends easily, reducing fittings and labor.
13. A trap primer is used to:
A. Clear blockages
B. Vent the trap
Certification Exam (Second Period) Practice
(Questions and Correct Answers (Verified
Answers) Plus Rationales 2026
1. Copper tube type L is identified by what color?
A. Yellow
B. Blue
C. Red
D. Green
Type L copper is marked with blue for medium-duty use.
2. Which fitting is used to join three sections of pipe at 90° angles?
A. Tee-wye
B. Wye
C. Coupling
D. Tee
A tee fitting connects one branch at 90° to the run.
3. A backwater valve is installed to protect against:
A. Low pressure
B. High pressure
C. Sewer backup
D. Pipe collapse
Backwater valves stop sewage from flowing back into a building.
,4. The minimum slope for a 3-inch horizontal drainage pipe is:
A. 1%
B. 2%
C. 0%
D. 5%
3 in. pipe requires 1:50 slope = 2%.
5. Solder used for potable water must not contain:
A. Tin
B. Copper
C. Lead
D. Silver
Potable water joints must use lead-free solder for health and code
compliance.
6. Which device prevents siphonage?
A. Gate valve
B. Pressure gauge
C. Air admittance valve
D. Ball valve
AAVs let air enter to balance pressure and prevent siphonage.
7. What is the name of the vertical pipe that carries wastewater to the
building drain?
A. Branch line
B. Soil stack
C. Vent stack
D. Leader
A soil stack conveys waste vertically.
8. The maximum vertical distance from trap weir to vent is known as:
A. Vent rise
B. Trap arm length
C. Stack offset
, D. Fixture tailpiece
Trap arm length determines vent effectiveness.
9. What tool is used to cut cast iron pipe?
A. Copper cutter
B. Chain cutter
C. PVC saw
D. Threader
Chain cutters snap cast iron cleanly and safely.
10. A pressure-reducing valve is used to:
A. Increase flow
B. Stop air in lines
C. Maintain safe pressure
D. Measure pressure
PRVs regulate high supply pressure to safe building levels.
11. What determines fixture unit values?
A. Temperature
B. Probability of use and flow demand
C. Pipe material
D. Elevation
Fixture unit ratings estimate load based on usage frequency and discharge.
12. The main advantage of PEX piping is:
A. Cannot freeze
B. Flexibility and ease of installation
C. Higher pressure rating
D. Requires no fittings
PEX bends easily, reducing fittings and labor.
13. A trap primer is used to:
A. Clear blockages
B. Vent the trap
