G3 Workplace Safety and PPE 2 — Questions and Answers
Question 1: What is the first action upon detecting a strong gas odour at a service location?
- Light a match to confirm
- Turn on the furnace to burn excess gas
- Evacuate immediately and call emergency services from safe distance (Correct answer)
- Open windows and continue
Correct answer: Evacuate immediately and call emergency services from safe distance
Evacuate all occupants, avoid ignition sources, and call emergency services from a safe location.
Do not operate electrical switches, phones, or create any ignition source. Wait for utility clearance before re-entry.
Question 2: What PPE is required for potentially confined space entry?
- Standard work gloves only
- SCBA or supplied air respirator, gas detector, and harness/lifeline (Correct answer)
- Safety glasses and steel-toed boots only
- Dust mask and hard hat
Correct answer: SCBA or supplied air respirator, gas detector, and harness/lifeline
Confined space entry requires respiratory protection, continuous gas detection, and rescue equipment.
Requires specific training, a permit system, and atmospheric testing before and during entry.
Question 3: What is the purpose of a Safety Data Sheet (SDS)?
- Manufacturer warranty information
- Health, safety, and handling information for hazardous materials (Correct answer)
- Installation date documentation
- Customer payment records
Correct answer: Health, safety, and handling information for hazardous materials
SDS documents provide critical hazard, handling, first aid, and emergency information.
Required under WHMIS for all hazardous materials including sealants, leak detection solutions, and fuel gases.
Question 4: Under Ontario's OHSA, what right do workers have regarding unsafe work?
- Cannot refuse work
- Right to refuse work believed dangerous to themselves or others (Correct answer)
- Can only refuse if supervisor agrees
- Right to refuse only applies to construction
Correct answer: Right to refuse work believed dangerous to themselves or others
All workers can refuse work they believe will endanger themselves or others.
A specific investigation procedure is triggered. Workers cannot be disciplined for exercising this right in good faith.
Question 5: What is WHMIS and how does it apply to gas technicians?
- A pressure measurement system
- Workplace Hazardous Materials Information System for classifying chemical hazards (Correct answer)
- A vent sizing method
- An electrical wiring standard
Correct answer: Workplace Hazardous Materials Information System for classifying chemical hazards
WHMIS is Canada's national hazard communication system with labels, SDS, and training.
Gas technicians must understand hazard symbols, read SDS documents, and follow safe handling procedures.
Question 6: What should be done if carbon monoxide exposure is suspected in a building occupant?
- Advise them to rest and continue
- Move to fresh air, call 911, shut down suspected source (Correct answer)
- Give water and open a window
- Tell them to see their doctor next week
Correct answer: Move to fresh air, call 911, shut down suspected source
CO exposure is a medical emergency requiring immediate fresh air, 911, and source shutdown.
Even mild symptoms require medical evaluation as internal damage may not be immediately apparent.
G3 Workplace Safety and PPE 2
What is the first action upon detecting a strong gas odour at a service location?