Q54: What is the purpose of gear box in the engine... - Fisheries Management and Responsible Fisheries - Fish Processing Technology- ICAR JRF/SRF 2024 | Agrigyan
In a fishing vessel propulsion train, the marine reduction-reverse gearbox is installed between the main diesel engine and the propeller shaft.
Primary Purpose:
Directional Control: Engages multi-plate clutches to allow forward, reverse, and neutral propeller shaft rotation while the engine runs continuously in one direction.
Speed Reduction: Steps down high engine crankshaft RPM ($1500-2000\text{ rpm}$) to efficient low propeller speeds ($300-500\text{ rpm}$).
Correct Option: Option 3 (Keeping the forward, reverse and neutral positions).
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