A&P - Powerplant Oral (Jeppesen) questions with correct answers

What is the purpose of dynamic dampers on crankshafts? Answer They reduce engine vibration. What types of bearings are generally found in reciprocating engines? Answer Plain, ball and roller bearings. Are the connecting rods used in each cylinder of a radial engine the same? Explain. Answer No. Radial engines use master and articulating rod assemblies. Name the different types of piston rings. Answer Oil control, compression, and oil scraper. Where should piston ring gaps be installed relative to each other, and why? Answer 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? Answer Excessive oil consumption. What purpose do oil control rings serve? Answer 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? Answer Two or more springs are used on each valve.