Alberta Plumber Apprenticeship Certification Exam (Second Period) Practice (Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A| Instant Download Pdf

Alberta Plumber Apprenticeship Certification
Exam (Second Period) Practice (Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A| Instant Download Pdf

1. What is the developed length of a 90° long-radius elbow?
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A. 150 mm g


B. 305 mm g


C. 230 mm g


D. 120 mm g


The long-radius 90° elbow commonly uses a developed length based on its
g g g g g g g g g g g


centerline radius, typically around 305 mm for standard trade sizing.
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2. What type of valve provides the best throttling control?
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A. Gate valve g


B. Globe valve g


C. Needle valve g


D. Ball valve g


Needle valves allow very fine adjustments to flow, making them ideal for
g g g g g g g g g g g


throttling.
g




3. The minimum size of a building drain for a residence is:
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A. 2 in.
g


B. 3 in.
g


C. 4 in.
g


D. 1½ in.
g


Residential building drains must not be smaller than 3 inches according to
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plumbing code.
g g

,4. The purpose of a trap weir is to:
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A. Support pipe g


B. Increase velocity g


C. Maintain the trap seal g g g


D. Provide pressure relief g g


The trap weir retains water, ensuring the trap seal prevents sewer gas entry.
g g g g g g g g g g g g




5. What is the function of a check valve?
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A. Increase pressure g


B. Reduce friction loss g g


C. Prevent reverse flow g g


D. Measure flow rate g g


Check valves are designed to stop backflow automatically.
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6. Copper tube type L is identified by what color?
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A. Yellow
B. Blue
C. Red
D. Green
Type L copper is marked with blue for medium-duty use.
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7. Which fitting is used to join three sections of pipe at 90° angles?
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A. Tee-wye
B. Wye
C. Coupling
D. Tee
A tee fitting connects one branch at 90° to the run.
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8. A backwater valve is installed to protect against:
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A. Low pressure g


B. High pressure g


C. Sewer backup g


D. Pipe collapse g


Backwater valves stop sewage from flowing back into a building.
g g g g g g g g g

, 9. The minimum slope for a 3-inch horizontal drainage pipe is:
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A. 1%
B. 2%
C. 0%
D. 5%
3 in. pipe requires 1:50 slope = 2%.
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10. Solder used for potable water must not contain:
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A. Tin
B. Copper
C. Lead
D. Silver
Potable water joints must use lead-free solder for health and code
g g g g g g g g g g


compliance.
g




11. Which device prevents siphonage? g g g




A. Gate valve g


B. Pressure gauge g


C. Air admittance valve
g g


D. Ball valve g


AAVs let air enter to balance pressure and prevent siphonage.
g g g g g g g g g




12. What is the name of the vertical pipe that carries wastewater to the
g g g g g g g g g g g g


building drain?
g g




A. Branch line g


B. Soil stack g


C. Vent stack g


D. Leader
A soil stack conveys waste vertically.
g g g g g




13. The maximum vertical distance from trap weir to vent is known as:
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A. Vent rise g


B. Trap arm length g g


C. Stack offset g