308A Safety Regulations and Trade Practices 1 — Questions and Answers
Question 1: According to most Canadian occupational health and safety regulations, at what height above the lower level must sheet metal workers use fall protection while working on a structure?
- 1.2 m (4 ft)
- 2.4 m (8 ft)
- 3 m (10 ft) (Correct answer)
- 4.5 m (15 ft)
Correct answer: 3 m (10 ft)
Most Canadian provinces, including Ontario and BC, require fall protection for workers at heights of 3 m (10 ft) or more on construction sites.
Question 2: What does WHMIS stand for in Canadian workplaces?
- Workplace Hazard Management and Information System
- Workplace Hazardous Materials Information System (Correct answer)
- Workers Health and Material Information Standards
- Workplace Handling of Materials and Injury Standards
Correct answer: Workplace Hazardous Materials Information System
WHMIS stands for Workplace Hazardous Materials Information System, Canada's national hazard communication standard.
Question 3: When cutting or welding galvanized sheet metal, what is the primary health hazard a worker must protect against?
- Iron oxide dust particles
- Zinc oxide fumes (Correct answer)
- Carbon monoxide gas
- Ultraviolet radiation only
Correct answer: Zinc oxide fumes
Heating or cutting galvanized steel releases zinc oxide fumes, which can cause metal fume fever and serious respiratory illness.
Question 4: Which class of fire extinguisher is appropriate for an electrical fire in a sheet metal workshop?
- Class A (water-based)
- Class B (foam)
- Class C (CO2 or dry chemical) (Correct answer)
- Class D (dry powder for metals)
Correct answer: Class C (CO2 or dry chemical)
Class C extinguishers use non-conductive agents such as CO2 or dry chemical, making them safe for energized electrical equipment fires.
Question 5: What personal protective equipment (PPE) is essential when operating a power shear?
- Hard hat and knee pads
- Safety glasses and cut-resistant gloves (Correct answer)
- Chemical-resistant apron and face shield only
- Hearing protection and welding helmet
Correct answer: Safety glasses and cut-resistant gloves
Power shears produce flying metal chips and sharp-edged offcuts, so safety glasses and cut-resistant gloves are mandatory to protect eyes and hands.
Question 6: A lockout/tagout (LOTO) procedure is required before performing which of the following tasks?
- Starting a power tool for the first time each day
- Performing maintenance or clearing jams on energized equipment (Correct answer)
- Using a ladder to access elevated work areas
- Moving sheet metal stock with a hand truck
Correct answer: Performing maintenance or clearing jams on energized equipment
LOTO procedures must be applied before any maintenance, repair, or unjamming of equipment to ensure it cannot be accidentally energized while a worker is in contact with it.
Question 7: What is the correct immediate procedure when a coworker sustains a laceration on a construction site?
- Complete the current task, then report the injury at the end of the shift
- Apply first aid, notify the supervisor, and complete an incident report (Correct answer)
- Contact WSIB directly before informing the site supervisor
- Only report the injury if the worker requires hospitalization
Correct answer: Apply first aid, notify the supervisor, and complete an incident report
Injuries must be treated with first aid immediately, reported to the supervisor promptly, and documented with an incident report as required by Canadian OHS legislation.
308A Safety Regulations and Trade Practices 1
According to most Canadian occupational health and safety regulations, at what height above the lower level must sheet metal workers use fall protection while working on a structure?