The airborne concentrations of substances (such as hydrogen sulfide) under which nearly all workers may be repeatedly exposed without adverse effects are called
Direct Answer
Option C: threshold limit values
The airborne concentrations of substances, such as hydrogen sulfide, under which nearly all workers may be repeatedly exposed day after day without adverse health effects are known as Threshold Limit Values (TLVs). These are established guidelines for occupational exposure limits.
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Detailed Explanation & Context
The airborne concentrations of substances, such as hydrogen sulfide, under which nearly all workers may be repeatedly exposed day after day without adverse health effects are known as Threshold Limit Values (TLVs). These are established guidelines for occupational exposure limits.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
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