________ increases efficieny and reduce emissions of main engine
Direct Answer
Option B: turbo charger refitting
Turbocharger efficiency directly dictates the scavenging air pressure and combustion quality of the main engine. Refitting or upgrading turbochargers optimizes the air-fuel ratio, significantly improving thermal efficiency and reducing specific fuel oil consumption, which inherently lowers exhaust emissions in compliance with modern environmental performance standards for marine propulsion.
All Options
Detailed Explanation & Context
Turbocharger efficiency directly dictates the scavenging air pressure and combustion quality of the main engine. Refitting or upgrading turbochargers optimizes the air-fuel ratio, significantly improving thermal efficiency and reducing specific fuel oil consumption, which inherently lowers exhaust emissions in compliance with modern environmental performance standards for marine propulsion.
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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