Lubrication Systems (Jepp/Prep/Crane) Questions and Answers Already Passed
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Module
Lubrication Systems
Institution
Lubrication Systems
Lubrication Systems (Jepp/Prep/Crane)
Questions and Answers Already Passed
If a reciprocating engine is consuming an excessive amount of oil without any visible leaks, what
is the likely issue?
Worn or damaged piston rings.
What are the roles of lubricating oil in a reciprocating engine?
...
1 Lubrication Systems (Jepp/Prep/Crane) Questions and Answers Already Passed If a reciprocating engine is consuming an excessive amount of oil without any visible leaks, what is the likely issue? ✔✔Worn or damaged piston rings . What are the roles of lubricating oil in a reciprocating engine? ✔✔It minimizes friction between moving components and helps dissipate heat. What are two key properties of engine oil used in aircraft? ✔✔The oil needs to be light enough for easy circulation but sufficiently thick to maintain an adequate oil film at the engine’s operating temperature. What might occur if the oil’s viscosity is too low for the engine’s normal operating temperature? ✔✔The oil could become too thin, leading to a breakdown of the oil film and increased wear on engine parts. 2 What considerations must engine manufacturers account for when selecting the appropriate oil grade for an engine? ✔✔They must consider the en gine’s operating load, temperature, and rotational speed. Why do aircraft reciprocating engines require oil with relatively high viscosity? ✔✔Because these engines typically have larger clearances and operate under high temperatures and pressures. What are common contaminants found in engine oil? ✔✔Metal shavings, dirt, carbon deposits, moisture, and acids. What could be a sign of low oil pressure combined with high oil temperature? ✔✔It could indicate an insufficient or low oil supply. In ashless dispersant (AD) oils, what role does the dispersant play? ✔✔The dispersant keeps sludge -forming substances from clumping together by suspending them in the oil until they can be filtered out, preventing deposits and keeping the engine cl ean.
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