A&P - Powerplant Oral (Jeppesen) Questions with 100% Correct Answers | Latest Version 2024 | Verified

What is the purpose of dynamic dampers on crankshafts? - They reduce engine vibration. What types of bearings are generally found in reciprocating engines? - Plain, ball and roller bearings. Are the connecting rods used in each cylinder of a radial engine the same? Explain. - No. Radial engines use master and articulating rod assemblies. Name the different types of piston rings. - Oil control, compression, and oil scraper. Where should piston ring gaps be installed relative to each other, and why? - Compression ring gaps should be staggered so that they do not align. This prevents excessive blow-by. What could result from incorrectly installed piston rings? - Excessive oil consumption. What purpose do oil control rings serve? - They regulate the thickness of the oil film on the cylinder walls. What is used to help prevent valve surge or floating in an aircraft engine? - Two or more springs are used on each valve.