Question 1
Under OBC Division B, Section 6.3.2 (Construction and Installation of Ducts and Plenums), what is the minimum clearance required between a duct and combustible material if the duct carries air at a temperature of not more than 50°C?
Correct Answer:
0 mm
Question 2
According to OBC Division B, 7.4.8.1, what is the minimum slope required for a horizontal sanitary drainage pipe with a size of 3 inches (75 mm) or less?
Correct Answer:
1 in 50 (2%)
Question 3
Under OBC Division B, Section 7.4.7.2, what is the maximum permitted distance between cleanouts on a horizontal drainage pipe of 3 inches (75 mm) or less?
Correct Answer:
15 metres
Question 4
What is the minimum height above the flood level rim of the fixture that a vent pipe connection must make before running horizontally or joining a vent stack under OBC Division B, 7.5.4.3?
Correct Answer:
150 mm
Question 5
In a residential occupancy containing a fuel-burning appliance, where must carbon monoxide alarms be installed under OBC Division B, Article 6.9.3.2?
Correct Answer:
Inside or within 5 metres of each bedroom
Question 1
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About this Exam

Prepare with the OBC Building Services Practice Questions - Ontario Building Code Exam Building Services Exam practice quiz. This question bank includes 100 questions covering division, minimum, duct, section, and maximum. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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OBC Building Services Practice Questions - Ontario Building Code Exam Building Services Exam

This practice set contains 100 questions from the matching question bank and focuses on division, minimum, duct, section, and maximum. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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