403A Safety 2 — Questions and Answers
Question 1: What is the correct ladder setup angle (ratio) for a straight or extension ladder?
- 1:2 ratio (base to height)
- 1:4 ratio (base to height) (Correct answer)
- 1:3 ratio (base to height)
- 1:5 ratio (base to height)
Correct answer: 1:4 ratio (base to height)
The correct setup angle for a straight or extension ladder is a 1:4 ratio — for every 4 feet of height, the base should be 1 foot away from the support structure. This creates approximately a 75-degree angle, providing optimal stability.
Question 2: Under Canadian OHS regulations, what must be done before excavation work begins?
- Only a visual inspection of the ground is required
- Underground utilities must be located and marked, and the excavation must be planned for soil type and depth (Correct answer)
- No specific requirements exist for excavations less than 2 metres
- Only the site supervisor needs to be notified
Correct answer: Underground utilities must be located and marked, and the excavation must be planned for soil type and depth
Before excavation, underground utilities must be located by calling the provincial one-call service (e.g., Ontario One Call, BC One Call). The excavation must be planned considering soil type, depth, water conditions, and shoring or sloping requirements.
Question 3: What is a Joint Health and Safety Committee (JHSC) and when is one required?
- A government inspection team; required for all projects
- A worker-employer committee; required when a workplace regularly employs 20 or more workers (Correct answer)
- A union grievance committee; required in unionized workplaces only
- A first aid team; required when hazardous materials are present
Correct answer: A worker-employer committee; required when a workplace regularly employs 20 or more workers
A JHSC is a committee composed of both worker and employer representatives that identifies workplace hazards and recommends solutions. Most provinces require a JHSC when a workplace regularly employs 20 or more workers.
Question 4: What is the maximum weight a worker should lift manually according to Canadian ergonomic guidelines?
- 15 kg (33 lbs)
- 23 kg (51 lbs) (Correct answer)
- 35 kg (77 lbs)
- 50 kg (110 lbs)
Correct answer: 23 kg (51 lbs)
Canadian ergonomic guidelines generally recommend a maximum manual lifting weight of approximately 23 kg (51 lbs) under ideal conditions. Factors such as lifting frequency, posture, distance, and grip may reduce this limit significantly.
Question 5: What is a toolbox talk (tailgate meeting) in Canadian construction safety?
- A meeting to inventory all tools on site
- A brief daily or weekly safety meeting discussing specific hazards relevant to the day's work (Correct answer)
- A formal training session conducted by the safety officer
- A meeting to discuss project schedules and deadlines
Correct answer: A brief daily or weekly safety meeting discussing specific hazards relevant to the day's work
A toolbox talk is a short, focused safety meeting (typically 5-15 minutes) held on site to discuss specific hazards, safe work procedures, and safety concerns related to the day's work activities. It keeps safety awareness current and relevant.
Question 6: Under Canadian regulations, what are the three worker rights known as the 'three rights' of occupational health and safety?
- Right to overtime pay, right to breaks, right to vacation
- Right to know, right to participate, and right to refuse unsafe work (Correct answer)
- Right to PPE, right to training, right to first aid
- Right to compensation, right to appeal, right to legal counsel
Correct answer: Right to know, right to participate, and right to refuse unsafe work
The three fundamental worker rights in Canadian OHS legislation are: the right to know about workplace hazards, the right to participate in health and safety activities (through JHSC or health and safety representative), and the right to refuse work they believe is unsafe.
403A Safety 2
What is the correct ladder setup angle (ratio) for a straight or extension ladder?