Refrigeration & Air Conditioning Mechanic Red Seal · Question
When is it permissible to use an open flame to heat a refrigeration component for purposes like loosening a seized connection?
Applying an open flame to a system containing refrigerant is extremely dangerous due to the risk of explosion (if pressure builds) and the formation of toxic ph
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
Question: When is it permissible to use an open flame to heat a refrigeration component for purposes like loosening a seized connection?
Answer options:
- Always, as long as proper ventilation is ensured ✅ Only when the system is fully evacuated and verified to have zero refrigerant pressure
- Only on the discharge line connection
- Never, as it always poses a fire and explosion hazard
Correct answer: Only when the system is fully evacuated and verified to have zero refrigerant pressure
Explanation: Applying an open flame to a system containing refrigerant is extremely dangerous due to the risk of explosion (if pressure builds) and the formation of toxic phosgene gas (when refrigerants like R-22 are exposed to high heat). It must only be done on an evacuated system.
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
More about Refrigeration & Air Conditioning Mechanic Red Seal
Related Questions
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
- Which type of electric motor requires a capacitor for starting and running, offering higher efficiency and bet
- When evacuating a refrigeration system, what is the recommended deep vacuum level, typically measured in micro
More for Refrigeration & Air Conditioning Mechanic Red Seal candidates
FAQs
Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Refrigeration & Air Conditioning Mechanic Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.