The maximum temperature rise of oil passing...

Question 1 / 270705eccefa0bacbc34ba4d4707c

Question 1 of 270705eccefa0bacbc34ba4d4707c

The maximum temperature rise of oil passing through any reduction gear set, or bearing, should not exceed __________.

Question 1 of 27070

The maximum temperature rise of oil passing through any reduction gear set, or bearing, should not exceed __________.

🔍 Key Concepts

• Manufacturer’s recommended limits for lubricating oil temperature rise across reduction gears and bearings • Why excessive oil temperature can damage gear teeth and bearing surfaces • Typical engineering practice limits for temperature rise in closed-loop lube oil systems

💭 Think About

• Think about what happens to lubricating oil properties (viscosity, film strength) as the temperature increases too much. • Consider which choice seems most consistent with protecting expensive reduction gears and bearings during continuous operation. • Ask yourself: would engineers design for a small, moderate, or very large temperature rise to ensure both efficiency and safety?

✅ Before You Answer

• Check which option represents a conservative, continuous-service limit rather than a short-term or emergency limit. • Make sure the value you pick seems reasonable for maintaining oil viscosity and preventing metal-to-metal contact. • Verify that the chosen rise is something a shipboard lube oil cooling system could realistically maintain under normal load.

Question 1 of 27070

The maximum temperature rise of oil passing through any reduction gear set, or bearing, should not exceed __________.

30°F (16.7°C)

50°F (27.8°C)

70°F (38.9°C)

90°F (44.5°C)