AIGF Exit Exam • Set 5 Question 21 of 30
LNG reduces CO2 emissions by --------in general, compared to diesel or heavy fuel oil powered vessels.
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Direct Answer
Option A: 25 to 30 percent
LNG combustion produces approximately 20% to 25-30% lower carbon dioxide (CO2) emissions compared to conventional heavy fuel oil (HFO) due to its higher hydrogen-to-carbon ratio.
All Options
A
25 to 30 percent
(Correct Answer)
B
10 to 15 percent
C
negligible
D
5 to 10 percent
Detailed Explanation & Context
LNG combustion produces approximately 20% to 25-30% lower carbon dioxide (CO2) emissions compared to conventional heavy fuel oil (HFO) due to its higher hydrogen-to-carbon ratio.
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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