The gears used for virtually all marine...

Question 1 / 205eccefa1bacbc34ba4d471ce

Question 1 of 205eccefa1bacbc34ba4d471ce

The gears used for virtually all marine propulsion reduction gear sets are of what type?

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Question 1 of 20

5eccefa1bacbc34ba4d471ce

The gears used for virtually all marine propulsion reduction gear sets are of what type?

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🔍 Key Concepts

• Common types of gears used in marine reduction gearboxes • How thrust loads and noise/vibration are handled in propulsion systems • Differences between spur, helical, double helical, and bevel gears

💭 Think About

• Which gear type is best for smooth, quiet power transmission at high load and continuous duty? • Which gear tooth arrangement helps cancel out axial (side) thrust in the gearbox? • Which gear type is typically used for changing shaft direction versus staying on the same shaft centerline?

✅ Before You Answer

• Identify which of the listed gear types is most commonly associated with main propulsion reduction gears in large marine engines • Check which gear types produce axial thrust and which designs can balance or eliminate it • Eliminate any gear types that are primarily used for changing shaft angle rather than for in-line reduction

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Question 1 of 20

The gears used for virtually all marine propulsion reduction gear sets are of what type?

Single spur gears

Single helical gears

Double helical gears

Double bevel gears

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