Alberta Plumber Apprenticeship Certification Exam (First
Period) Practice Questions And Correct Answers (Verified
Latest Update 2026/2027 | Graded A+.
)
1. What is the primary purpose of a trap in a drainage system?
A. Provide mechanical filtration
B. Prevent sewer gases from entering the building
C. Increase water pressure
D. Prevent pipe corrosion
Rationale: Traps hold a water seal that blocks harmful sewer gases from
migrating into occupied spaces.
2. What is the minimum water seal depth required for a trap?
A. 25 mm
B. 100 mm C. 50 mm
D. 150 mm
Rationale: Most codes require a 50 mm (2-inch) water seal to maintain
effective gas blocking.
3. A vent prevents which of the following?
A. Water hammer
B. Trap siphonage
C. Pipe corrosion
D. Backflow
Rationale: Vents equalize air pressure to prevent traps from being siphoned
dry.
4. Which type of copper tube is typically used for water distribution?
A. Type DWV
,B. Type K only
C. Type L
D. Type M
Rationale: Type L strikes a balance between wall thickness and cost,
making it suitable for water supply lines.
9. Hard water contains high levels of:
A. Sodium
B. Iron
C. Calcium and magnesium
D. Carbon dioxide
Rationale: Hardness is caused by calcium and magnesium mineral content.
10. The term “fixture unit” measures:
A. Weight of a fixture
B. Probable discharge load of a fixture
C. Size of drain
D. Pressure rating
Rationale: Fixture units estimate probable demand on a drainage or water
system.
11. What is the minimum size for a building drain?
A. 2"
B. 3"
C. 4" D. 6"
Rationale: Building drains normally require at least 4 inches for capacity
and code compliance.
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12. Galvanic corrosion occurs when:
A. Water is too pure
B. Dissimilar metals contact in presence of an electrolyte
C. Pressure is too high
D. Venting is inadequate
Period) Practice Questions And Correct Answers (Verified
Latest Update 2026/2027 | Graded A+.
)
1. What is the primary purpose of a trap in a drainage system?
A. Provide mechanical filtration
B. Prevent sewer gases from entering the building
C. Increase water pressure
D. Prevent pipe corrosion
Rationale: Traps hold a water seal that blocks harmful sewer gases from
migrating into occupied spaces.
2. What is the minimum water seal depth required for a trap?
A. 25 mm
B. 100 mm C. 50 mm
D. 150 mm
Rationale: Most codes require a 50 mm (2-inch) water seal to maintain
effective gas blocking.
3. A vent prevents which of the following?
A. Water hammer
B. Trap siphonage
C. Pipe corrosion
D. Backflow
Rationale: Vents equalize air pressure to prevent traps from being siphoned
dry.
4. Which type of copper tube is typically used for water distribution?
A. Type DWV
,B. Type K only
C. Type L
D. Type M
Rationale: Type L strikes a balance between wall thickness and cost,
making it suitable for water supply lines.
9. Hard water contains high levels of:
A. Sodium
B. Iron
C. Calcium and magnesium
D. Carbon dioxide
Rationale: Hardness is caused by calcium and magnesium mineral content.
10. The term “fixture unit” measures:
A. Weight of a fixture
B. Probable discharge load of a fixture
C. Size of drain
D. Pressure rating
Rationale: Fixture units estimate probable demand on a drainage or water
system.
11. What is the minimum size for a building drain?
A. 2"
B. 3"
C. 4" D. 6"
Rationale: Building drains normally require at least 4 inches for capacity
and code compliance.
, Thank you for Purchasing this exam Study
Guide. We provide high-quality academic
materials to help students excel in exams.
Our other Services include but not limited
to: academic research, University & College
assignments writing, essay writing, Online
Classes, and research projects. Our services
are reliable, affordable, and plagiarism-
free. All the Best in your Exam. For more
information; Contact us at:
or
0R +254
741484450
12. Galvanic corrosion occurs when:
A. Water is too pure
B. Dissimilar metals contact in presence of an electrolyte
C. Pressure is too high
D. Venting is inadequate
