ALBERTA PLUMBER SECOND PERIOD AIT EXAM PRACT QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
,Core Domains*
Sanitary Drainage, Waste and Vent (DWV) Systems*
Potable Water Distribution Systems*
Fixture and Appliance Installation*
Hydronic Heating and Low-Pressure Steam Systems*
Pipe Materials, Joining Methods and Sizing*
Occupational Health and Safety Regulations*
National Plumbing Code of Canada Compliance*
Professional Ethics and Legal Responsibilities*
Introduction*
,This assessment evaluates competency for Alberta plumber apprentices completing their second period of
technical training. The exam measures essential knowledge in drainage, venting, water distribution, fixture
installation, and hydronic systems aligned with the National Plumbing Code of Canada. Questions use
multiple-choice and scenario-based formats that emphasize real-world application, critical decision-making,
and regulatory compliance. Candidates must demonstrate both theoretical understanding and practical
problem-solving skills required for journeyperson certification progression. Success requires mastery of code
requirements, safety protocols, and professional standards specific to Alberta's apprenticeship program.*
SECTION ONE: QUESTIONS 1–100
Question 1
What is the minimum trap seal depth required for a fixture trap according to the National Plumbing Code of
Canada?
A. 25 mm (1 inch)
B. 50 mm (2 inches)
C. 75 mm (3 inches)
D. 100 mm (4 inches)
🟢 B. 50 mm (2 inches)
🔴 RATIONALE: The National Plumbing Code of Canada requires all fixture traps to maintain a seal depth of
not less than 50 mm (2 inches) to prevent sewer gases from entering the building. A seal shorter than 50 mm
may be easily broken by capillary action, evaporation, or pressure fluctuations.
, Question 2
An apprentice is installing a clothes washer standpipe. What is the minimum required length of the standpipe
measured from the trap weir?
A. 450 mm (18 inches)
B. 600 mm (24 inches)
C. 750 mm (30 inches)
D. 900 mm (36 inches)
🟢 B. 600 mm (24 inches)
🔴 RATIONALE: According to Alberta plumbing standards and the NPC, a clothes washer standpipe must be
not less than 600 mm long measured from the trap weir and must terminate above the flood level rim of the
clothes washer.
Question 3
Which test is most appropriate for testing sanitary drainage piping after installation?
A. Water hammer test
B. Smoke test
C. Vacuum test
D. Tensile strength test
🟢 B. Smoke test
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
,Core Domains*
Sanitary Drainage, Waste and Vent (DWV) Systems*
Potable Water Distribution Systems*
Fixture and Appliance Installation*
Hydronic Heating and Low-Pressure Steam Systems*
Pipe Materials, Joining Methods and Sizing*
Occupational Health and Safety Regulations*
National Plumbing Code of Canada Compliance*
Professional Ethics and Legal Responsibilities*
Introduction*
,This assessment evaluates competency for Alberta plumber apprentices completing their second period of
technical training. The exam measures essential knowledge in drainage, venting, water distribution, fixture
installation, and hydronic systems aligned with the National Plumbing Code of Canada. Questions use
multiple-choice and scenario-based formats that emphasize real-world application, critical decision-making,
and regulatory compliance. Candidates must demonstrate both theoretical understanding and practical
problem-solving skills required for journeyperson certification progression. Success requires mastery of code
requirements, safety protocols, and professional standards specific to Alberta's apprenticeship program.*
SECTION ONE: QUESTIONS 1–100
Question 1
What is the minimum trap seal depth required for a fixture trap according to the National Plumbing Code of
Canada?
A. 25 mm (1 inch)
B. 50 mm (2 inches)
C. 75 mm (3 inches)
D. 100 mm (4 inches)
🟢 B. 50 mm (2 inches)
🔴 RATIONALE: The National Plumbing Code of Canada requires all fixture traps to maintain a seal depth of
not less than 50 mm (2 inches) to prevent sewer gases from entering the building. A seal shorter than 50 mm
may be easily broken by capillary action, evaporation, or pressure fluctuations.
, Question 2
An apprentice is installing a clothes washer standpipe. What is the minimum required length of the standpipe
measured from the trap weir?
A. 450 mm (18 inches)
B. 600 mm (24 inches)
C. 750 mm (30 inches)
D. 900 mm (36 inches)
🟢 B. 600 mm (24 inches)
🔴 RATIONALE: According to Alberta plumbing standards and the NPC, a clothes washer standpipe must be
not less than 600 mm long measured from the trap weir and must terminate above the flood level rim of the
clothes washer.
Question 3
Which test is most appropriate for testing sanitary drainage piping after installation?
A. Water hammer test
B. Smoke test
C. Vacuum test
D. Tensile strength test
🟢 B. Smoke test
