ALBERTA PLUMBER APPRENTICESHIP CERTIFICATION EXAM –
THIRD PERIOD COMPREHENSIVE PRACTICE EXAM LATEST
2026/2027
**1. What is the primary purpose of a drainage system in a building?**
A. Supply potable water
B. Remove wastewater and convey it safely to an approved disposal point
C. Increase water pressure
D. Prevent hot-water expansion
**Answer: B — Remove wastewater and convey it safely to an approved disposal
point**
**2. Which component primarily provides access for cleaning a drainage piping
system?**
A. Cleanout
B. Trap primer
C. Vacuum breaker
D. Pressure-reducing valve
**Answer: A — Cleanout**
**3. When sizing a drainage system, which factor is especially important?**
A. Paint colour
,B. Pipe insulation thickness only
C. Fixture-unit loading
D. Building ceiling height
**Answer: C — Fixture-unit loading**
**4. What is the main purpose of maintaining adequate slope on horizontal drainage
piping?**
A. Increase water temperature
B. Reduce pipe diameter
C. Increase static pressure
D. Promote proper drainage and reduce solids accumulation
**Answer: D — Promote proper drainage and reduce solids accumulation**
**5. A drainage pipe that is too small for its expected load may result in:**
A. Excessive pressure at fixtures
B. Inadequate drainage capacity
C. Improved venting
D. Lower water temperature
**Answer: B — Inadequate drainage capacity**
,**6. What is the purpose of a building drain?**
A. To distribute potable water
B. To supply fixture traps
C. To carry drainage from the building toward the building sewer
D. To regulate water pressure
**Answer: C — To carry drainage from the building toward the building sewer**
**7. Which condition is most likely to cause repeated drainage stoppages?**
A. Properly sized and sloped piping
B. Excessive or inadequate slope and improper installation
C. Correctly installed cleanouts
D. Properly supported piping
**Answer: B — Excessive or inadequate slope and improper installation**
**8. Why are drainage pipes required to be properly supported?**
A. To maintain grade and prevent stress or displacement
B. To increase water hardness
C. To reduce fixture-unit values
D. To increase pipe temperature
**Answer: A — To maintain grade and prevent stress or displacement**
, **9. What is a drainage fixture unit primarily used for?**
A. Determining pipe colour
B. Measuring water temperature
C. Calculating electrical demand
D. Estimating the probable drainage load on piping
**Answer: D — Estimating the probable drainage load on piping**
**10. Which installation would most directly interfere with drainage flow?**
A. Properly installed cleanout
B. Correctly supported pipe
C. Improperly installed fitting creating an obstruction
D. Properly sized branch drain
**Answer: C — Improperly installed fitting creating an obstruction**
**11. The purpose of a cleanout is to:**
A. Provide access for inspection and clearing of piping
B. Increase water pressure
C. Supply air to a fixture
D. Prevent thermal expansion
THIRD PERIOD COMPREHENSIVE PRACTICE EXAM LATEST
2026/2027
**1. What is the primary purpose of a drainage system in a building?**
A. Supply potable water
B. Remove wastewater and convey it safely to an approved disposal point
C. Increase water pressure
D. Prevent hot-water expansion
**Answer: B — Remove wastewater and convey it safely to an approved disposal
point**
**2. Which component primarily provides access for cleaning a drainage piping
system?**
A. Cleanout
B. Trap primer
C. Vacuum breaker
D. Pressure-reducing valve
**Answer: A — Cleanout**
**3. When sizing a drainage system, which factor is especially important?**
A. Paint colour
,B. Pipe insulation thickness only
C. Fixture-unit loading
D. Building ceiling height
**Answer: C — Fixture-unit loading**
**4. What is the main purpose of maintaining adequate slope on horizontal drainage
piping?**
A. Increase water temperature
B. Reduce pipe diameter
C. Increase static pressure
D. Promote proper drainage and reduce solids accumulation
**Answer: D — Promote proper drainage and reduce solids accumulation**
**5. A drainage pipe that is too small for its expected load may result in:**
A. Excessive pressure at fixtures
B. Inadequate drainage capacity
C. Improved venting
D. Lower water temperature
**Answer: B — Inadequate drainage capacity**
,**6. What is the purpose of a building drain?**
A. To distribute potable water
B. To supply fixture traps
C. To carry drainage from the building toward the building sewer
D. To regulate water pressure
**Answer: C — To carry drainage from the building toward the building sewer**
**7. Which condition is most likely to cause repeated drainage stoppages?**
A. Properly sized and sloped piping
B. Excessive or inadequate slope and improper installation
C. Correctly installed cleanouts
D. Properly supported piping
**Answer: B — Excessive or inadequate slope and improper installation**
**8. Why are drainage pipes required to be properly supported?**
A. To maintain grade and prevent stress or displacement
B. To increase water hardness
C. To reduce fixture-unit values
D. To increase pipe temperature
**Answer: A — To maintain grade and prevent stress or displacement**
, **9. What is a drainage fixture unit primarily used for?**
A. Determining pipe colour
B. Measuring water temperature
C. Calculating electrical demand
D. Estimating the probable drainage load on piping
**Answer: D — Estimating the probable drainage load on piping**
**10. Which installation would most directly interfere with drainage flow?**
A. Properly installed cleanout
B. Correctly supported pipe
C. Improperly installed fitting creating an obstruction
D. Properly sized branch drain
**Answer: C — Improperly installed fitting creating an obstruction**
**11. The purpose of a cleanout is to:**
A. Provide access for inspection and clearing of piping
B. Increase water pressure
C. Supply air to a fixture
D. Prevent thermal expansion
