A main propulsion reversing reduction gear...

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Question 1 of 2066636eef28f7522a1c51fee5

A main propulsion reversing reduction gear unit on your river pushboat is fitted with wet-type duplex multiple-plate type clutches. When in the neutral position, the output shaft continues to turn. Which of the following listed conditions would most likely be responsible for this?

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🔍 Key Concepts

• Operation of wet-type multiple-plate clutches in neutral (no ahead or astern engaged) • How oil level and oil pressure can cause clutch plate drag in a wet clutch system • Mechanical effects of warped clutch discs versus simple hydraulic drag

💭 Think About

• In neutral, think about what should be happening between the driving and driven members of the clutch. What condition would let them "slip" but still transmit a little motion? • Which listed condition would most easily cause a light, slow rotation of the output shaft rather than a hard, solid engagement? • Compare which options relate to loss of separation between clutch plates versus issues that would mainly cause leakage, overheating, or damage.

✅ Before You Answer

• Decide which options would cause continuous light drag between plates even when the clutch is supposed to be disengaged. • Ask yourself which condition is most common and most easily corrected as an operational issue, rather than a serious mechanical failure. • Eliminate any options that do not directly affect contact or fluid drag between the driving and driven clutch plates.

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