HK Confined Space Certified Worker Practice Questions - Safety Training Course For Certified Workers Of Confined Spaces Operation Exam

Why are tanks, boilers and pressure receivers commonly treated as potential confined spaces?

They always contain only clean outdoor air at 21% oxygen Their enclosed nature can create oxygen deficiency, toxic atmospheres or other specified risks They are designed for continuous long-term human occupancy They have multiple unrestricted ground-level doors like an office lobby

Correct Answer:

Their enclosed nature can create oxygen deficiency, toxic atmospheres or other specified risks

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