Plumber Red Seal · Question
According to typical provincial occupational health and safety regulations, what is required when working in a trench that is 1.5 metres (5 feet) deep in unstable soil?
Excavations deeper than 1.2 metres (4 feet) generally require a temporary protective structure, such as shoring or a trench box, to prevent cave-ins, especially
Start free practice for Plumber Red Seal
177 questions · no signup required · 40 free questions per day
Question: According to typical provincial occupational health and safety regulations, what is required when working in a trench that is 1.5 metres (5 feet) deep in unstable soil?
Answer options:
- A designated spotter at all times ✅ A temporary support system like shoring or a trench box
- A supplied-air respirator
- A valid hot work permit
Correct answer: A temporary support system like shoring or a trench box
Explanation: Excavations deeper than 1.2 metres (4 feet) generally require a temporary protective structure, such as shoring or a trench box, to prevent cave-ins, especially in unstable soil conditions. This is a fundamental trench safety rule.
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.