When monitoring steam propulsion plant...

Question 1 / 2707066636ef128f7522a1c5216bb

Question 1 of 2707066636ef128f7522a1c5216bb

When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?

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Question 1 of 27070

When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?

🔍 Key Concepts

• Heat pickup across a bearing: oil enters cooler, then bearing, then returns hotter. • Where is temperature actually changing because of friction? In the bearing, not the cooler. • System flow path: cooler inlet → cooler outlet → bearing inlet → bearing outlet.

💭 Think About

• Trace the physical path of the lubricating oil through the system and identify where it actually absorbs heat from the bearing. • Ask yourself: which two temperature points bracket just the bearing, not the cooler or entire system? • Eliminate any answer that mainly measures cooler performance instead of bearing heat rise.

✅ Before You Answer

• Be sure you know which temperature is bearing outlet and which is from the cooler (inlet or outlet). • Confirm which two temperatures isolate the bearing’s contribution to the oil temperature change only. • Verify that the pair you choose does not include both points on the same side of the cooler.

Question 1 of 27070

When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?

The temperature difference between the bearing lube oil outlet temperature and the lube oil cooler oil outlet temperature.

The temperature difference between the bearing lube oil outlet temperature and the lube oil cooler oil inlet temperature.

The temperature difference between the lube oil cooler oil inlet temperature and the lube oil cooler oil outlet temperature.

It is NOT possible to determine individual bearing temperature rises for lubricating oil.

Question 1 / 2707066636ef128f7522a1c5216bb

Question 1 of 2707066636ef128f7522a1c5216bb

When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?

Back

Question 1 of 27070

When monitoring steam propulsion plant lubricating oil temperatures while underway, what represents the temperature rise across an individual bearing?