403A Safety — Questions and Answers
Question 1: Under Canadian occupational health and safety regulations, at what height does fall protection become mandatory for construction workers?
- 2.0 metres
- 3.0 metres (Correct answer)
- 4.0 metres
- 5.0 metres
Correct answer: 3.0 metres
Most Canadian provincial OHS regulations require fall protection when workers are exposed to a fall hazard of 3.0 metres (10 feet) or more. Some jurisdictions may have lower thresholds for specific work activities.
Question 2: What does WHMIS 2015 stand for and what is its purpose?
- Workplace Handling of Materials Information System — tracks material inventory
- Workplace Hazardous Materials Information System — ensures workers know the hazards of chemicals they work with (Correct answer)
- Worker Health Monitoring and Inspection Standard — monitors worker health
- Workplace Hazard Mitigation and Incident System — reports workplace incidents
Correct answer: Workplace Hazardous Materials Information System — ensures workers know the hazards of chemicals they work with
WHMIS 2015 (Workplace Hazardous Materials Information System) is Canada's national hazard communication standard, aligned with GHS. It requires supplier labels, safety data sheets (SDS), and worker education for all hazardous products in the workplace.
Question 3: What are the three main components of the WHMIS 2015 system?
- Labels, training certificates, and incident reports
- Supplier labels, Safety Data Sheets (SDS), and worker education/training (Correct answer)
- Hazard signs, first aid kits, and emergency procedures
- Material storage, handling procedures, and disposal guidelines
Correct answer: Supplier labels, Safety Data Sheets (SDS), and worker education/training
The three pillars of WHMIS 2015 are: (1) supplier labels with standardized pictograms and hazard statements, (2) Safety Data Sheets (SDS) with 16 sections of detailed product information, and (3) worker education and training programs.
Question 4: When working on a construction site in Canada, what is the purpose of a competent supervisor?
- To handle payroll and scheduling
- To ensure work is performed safely and in compliance with OHS regulations (Correct answer)
- To order materials and manage the budget
- To negotiate with building inspectors
Correct answer: To ensure work is performed safely and in compliance with OHS regulations
Under Canadian OHS legislation, a competent supervisor has the knowledge, training, and experience to organize and ensure work is carried out safely. They must be familiar with the OHS Act, regulations, and potential hazards specific to the work being done.
Question 5: What is a lockout/tagout procedure used for on a construction site?
- To secure the site perimeter after working hours
- To ensure energy sources are isolated and de-energized before maintenance or repair work (Correct answer)
- To lock up valuable tools and materials
- To tag completed inspection items on a checklist
Correct answer: To ensure energy sources are isolated and de-energized before maintenance or repair work
Lockout/tagout (LOTO) procedures ensure that hazardous energy sources (electrical, mechanical, hydraulic, pneumatic) are properly isolated and de-energized before workers perform maintenance, repair, or servicing. Locks prevent re-energization and tags warn others.
Question 6: What type of personal protective equipment (PPE) is required at a minimum on most Canadian construction sites?
- Safety glasses and gloves only
- Hard hat, safety footwear, and high-visibility vest (Correct answer)
- Respirator and hearing protection only
- Full body harness at all times
Correct answer: Hard hat, safety footwear, and high-visibility vest
The minimum PPE required on most Canadian construction sites includes a CSA-approved hard hat, CSA-approved safety footwear (steel or composite toe), and a high-visibility vest or clothing. Additional PPE is required based on specific task hazards.
403A Safety
Under Canadian occupational health and safety regulations, at what height does fall protection become mandatory for construction workers?