MRG stands for which equipment?

MRG stands for which equipment?

• A. Main Reduction Gear
• B. Marine Reduction Gear
• C. Main Revolving Gear
• D. Mechanical Reduction Gear

Answer: (A)

MRG stands for Main Reduction Gear—the primary gearing in a ship’s propulsion system that takes the high-speed output of the main engine and reduces it to a slower, higher-torque speed suitable for the propeller shaft. This reduction is essential because marine engines run at very high RPM, while the propeller needs a much lower speed to operate efficiently and avoid cavitation. The Main Reduction Gear houses the gear set that accomplishes this speed reduction and is a key part of the propulsion train. The other terms aren’t standard naval terminology, so they don’t correctly name this component.

MRG stands for Main Reduction Gear—the primary gearing in a ship’s propulsion system that takes the high-speed output of the main engine and reduces it to a slower, higher-torque speed suitable for the propeller shaft. This reduction is essential because marine engines run at very high RPM, while the propeller needs a much lower speed to operate efficiently and avoid cavitation. The Main Reduction Gear houses the gear set that accomplishes this speed reduction and is a key part of the propulsion train. The other terms aren’t standard naval terminology, so they don’t correctly name this component.