Question 168General Subjects - 1st Asst/Chief70% to pass
Of the following propulsion modes, which one would operate with a geared-drive featuring a double reduction?
AI Explanation
The correct answer is D) Gas turbine.
Gas turbine propulsion systems for ships typically operate at high speeds, requiring a geared-drive system with a double reduction gear to match the lower operating speeds of the propeller. This allows the gas turbine to operate at its optimal high-speed range while reducing the speed to a suitable level for the propeller.
In contrast, slow speed diesel, medium speed diesel, and high speed diesel engines do not typically require a double reduction gear, as their operating speeds are already better suited for direct coupling to the propeller.
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