Plumber Red Seal · Question
When backfilling an excavated trench for an underground building sewer, what material should primarily be used directly around the pipe to provide proper support and prevent future settlement or damage?
Granular material, such as sand or fine gravel, compacted in uniform lifts provides excellent support, allows for proper compaction around the pipe, and minimiz
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: When backfilling an excavated trench for an underground building sewer, what material should primarily be used directly around the pipe to provide proper support and prevent future settlement or damage?
Answer options:
- Coarse gravel and large rocks.
- Excavated clay soil without compaction. ✅ Granular material, such as sand or fine gravel, compacted in lifts.
- Organic topsoil.
Correct answer: Granular material, such as sand or fine gravel, compacted in lifts.
Explanation: Granular material, such as sand or fine gravel, compacted in uniform lifts provides excellent support, allows for proper compaction around the pipe, and minimizes the risk of damage or future settlement. Coarse gravel can damage the pipe, and uncompacted clay or organic soil can settle unevenly.
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
More about Plumber Red Seal
Related Questions
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
- A plumber is considering the velocity of water in a 50 mm (2") copper pipe supplying a commercial building. Ex
- A plumber is designing the domestic hot water recirculation system for a multi-story residential building. Wha
More for Plumber Red Seal candidates
Practice tests
Question explanations
- Before starting a new plumbing installation in a residential basement, what is the primary reason why a plumbe
- A plumber is installing a new kitchen sink in an existing residential dwelling. The sink drain is connected to
- A plumber is installing drainage for a dishwasher in a residential kitchen. The dishwasher P-trap is located 1
- A plumber is asked to install a backflow prevention assembly on a lawn irrigation system connected to the pota
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Plumber Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.