Identify the statement that highlights the purpose of using a non-catalytic heated filament gas indicator,
Direct Answer
Option B: Since the inerted atmosphere is deficient in oxygen the catalytic gas indicators cannot be used in inerted atmospheres.
Catalytic filament gas indicators require oxygen for the combustion reaction to detect flammable gases. In inerted atmospheres, which are oxygen-deficient, these instruments are ineffective. Non-catalytic heated filament indicators, often thermal conductivity types, are used instead as they measure gas concentration based on thermal properties, independent of oxygen levels, as per ISGOTT guidelines.
All Options
Detailed Explanation & Context
Catalytic filament gas indicators require oxygen for the combustion reaction to detect flammable gases. In inerted atmospheres, which are oxygen-deficient, these instruments are ineffective. Non-catalytic heated filament indicators, often thermal conductivity types, are used instead as they measure gas concentration based on thermal properties, independent of oxygen levels, as per ISGOTT guidelines.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).
Practice Full CHEMCO Set 11
Test yourself with 30 interactive questions, live timer, and instant score.