___________ is a refrigerant gas?
Direct Answer
Option B: R22
R22, or chlorodifluoromethane, is a widely utilized hydrochlorofluorocarbon refrigerant gas in marine refrigeration systems. While its use is being phased out under international environmental regulations due to ozone depletion potential, it remains a recognized refrigerant in older shipboard installations for maintaining cargo or fuel temperature control.
All Options
Detailed Explanation & Context
R22, or chlorodifluoromethane, is a widely utilized hydrochlorofluorocarbon refrigerant gas in marine refrigeration systems. While its use is being phased out under international environmental regulations due to ozone depletion potential, it remains a recognized refrigerant in older shipboard installations for maintaining cargo or fuel temperature control.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Ships subject to the IGF Code (AIGF).
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