LGTCO/LGTF Exit Exam • Set 4 Question 30 of 30
What are Carbamates in gas shipping chemistry?
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Direct Answer
Option A: A white powdery substance produced by the reaction of ammonia with carbon dioxide
Carbamates (ammonium carbamate) are white powdery solids formed when ammonia reacts with carbon dioxide (such as from combustion inert gas), which can severely choke cargo valves and filters.
All Options
A
A white powdery substance produced by the reaction of ammonia with carbon dioxide
(Correct Answer)
B
Compounds formed by the interaction of water and hydrocarbons at certain pressures and temperatures
C
Compounds formed by the chemical combination of cargo liquid with oxygen
D
The chemical union of two or more identical molecules into a polymer
Detailed Explanation & Context
Carbamates (ammonium carbamate) are white powdery solids formed when ammonia reacts with carbon dioxide (such as from combustion inert gas), which can severely choke cargo valves and filters.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Liquefied Gas Tanker Cargo Operations (LGTCO/LGTF).
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