Which of the following methods is used to...

Question 1 / 2707066636eef28f7522a1c51fb3a

Question 1 of 2707066636eef28f7522a1c51fb3a

Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?

Question 1 of 27070

Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?

🔍 Key Concepts

• Difference between splash, spray, and pressure lubrication systems • Typical lubrication needs of medium-speed main propulsion reduction gears (high load, continuous duty) • How gear tooth contact at the mesh is best protected under heavy load

💭 Think About

• Think about which method would most reliably deliver a continuous film of oil exactly where the teeth mesh under high torque and varying speed. • Consider which methods might be more common on small, slow-speed, lightly loaded machinery versus large ship main propulsion reduction gears. • Ask yourself which method would best control oil temperature, cleanliness, and pressure, all critical for expensive reduction gears.

✅ Before You Answer

• Eliminate any option that relies mainly on random splashing or passive pickup for a heavily loaded main reduction gear. • Focus on options that can provide controlled flow and pressure of oil to the tooth contact area. • Check which method is most consistent with having filters, coolers, and positive circulation in a main reduction gear lube oil system.

Question 1 of 27070

Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?

Oil is sprayed through nozzles at the point of gear mesh.

Oil rings in channels outside the gears dip into oil in the sump and carry it to the gear teeth.

The gears run through an open oil sump and oil is carried along on the gear teeth.

Oil is pressure fed through internal drilled passages which force oil to the gear's periphery.

Question 1 / 2707066636eef28f7522a1c51fb3a

Question 1 of 2707066636eef28f7522a1c51fb3a

Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?

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Question 1 of 27070

Which of the following methods is used to lubricate main propulsion medium-speed diesel engine reduction gears?