Refrigeration & Air Conditioning Mechanic Red Seal · Question
A technician is performing work inside a large air handling unit containing a chilled water coil. The unit is located in a basement mechanical room with limited access. Before entry, what is the LEAST important consideration from a confined space safety perspective?
While temperature can be a comfort factor, the temperature of the chilled water itself is generally not a primary hazardous atmospheric condition for confined s
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Question: A technician is performing work inside a large air handling unit containing a chilled water coil. The unit is located in a basement mechanical room with limited access. Before entry, what is the LEAST important consideration from a confined space safety perspective?
Answer options:
- Oxygen content of the air inside the unit.
- Presence of hazardous gases or vapours. ✅ Temperature of the chilled water within the coil.
- Effectiveness of lockout/tagout procedures for fans and dampers.
Correct answer: Temperature of the chilled water within the coil.
Explanation: While temperature can be a comfort factor, the temperature of the chilled water itself is generally not a primary hazardous atmospheric condition for confined space entry unless there's a risk of scalding if the coil ruptures. The other options directly relate to atmospheric hazards and kinetic energy hazards associated with confined spaces, which are critical safety considerations.
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- 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
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