HSE Closed Bell Saturation Commercial Diver Qualification Practice Questions - HSE Closed Bell Saturation Commercial Diver Qualification (UK HSE IMCA) Exam

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High Pressure Nervous Syndrome (HPNS) is primarily triggered by which combination of factors during deep saturation diving?

Rapid compression rate to depths beyond 150 metres while breathing heliox Sudden pressure drops during fast bell ascents to storage depth Prolonged breathing of high partial pressures of oxygen above 1.4 bar Accumulation of carbon dioxide in the diver's helmet due to scrubber failure

Correct Answer:

Rapid compression rate to depths beyond 150 metres while breathing heliox

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