Lubrication for the main reduction gears...

Question 1 of 270705eccefa3bacbc34ba4d47cba

Lubrication for the main reduction gears used with diesel engines is usually supplied by __________.

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Question 1 of 27070

Q

Lubrication for the main reduction gears used with diesel engines is usually supplied by __________.

🔍 Key Concepts

• main reduction gear function in a diesel propulsion plant • importance of clean, reliably pressurized lube oil for gears versus engine bearings • difference between a shared sump and an independent lube oil system

💭 Think About

• Which part of the propulsion plant would be most damaged, most quickly, if lube oil flow stopped or became contaminated? • If the diesel engine had to be secured, would you still sometimes need to be able to rotate or protect the reduction gears? What does that suggest about where their oil supply comes from? • Do stern bearings and main engine sumps normally operate at the same pressure, flow, and cleanliness requirements as reduction gears?

✅ Before You Answer

• Identify which options are associated with stern tube lubrication rather than gear lubrication. • Decide whether a common sump with the main engine would risk sharing contaminants or metal particles with the gears. • Think about which choice allows dedicated pumps, coolers, and filters sized specifically for the reduction gear.