Term
| What is the purpose of dynamic dampers on crankshafts? |
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Definition
| They reduce engine vibration |
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Term
| What type of bearing is usually found in reciprocating engines? |
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Definition
| Plain, ball, and roller bearings |
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Term
| Are the connecting rods used in each cylinder of a radial engine the same? Explain. |
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Definition
| No, radial engines use master and articulating rod assemblies. |
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Term
| Name the different types of piston rings |
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Definition
| Oil control, compression and oil scraper |
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Term
| Where should piston ring gaps be installed relative to each other, and why? |
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Definition
| Compression ring gaps should be staggered so that they do not align. This prevents excessive blow by |
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Term
| What could result from incorrectly installed piston rings? |
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Definition
| Excessive oil consumption |
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Term
| What purpose do oil control rings serve? |
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Definition
| They regulate the thickness of the oil film on the cylinder walls |
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Term
| What is used to help prevent valve surge or floating in an aircraft engine? |
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Definition
| Two or more springs are used on each valve |
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Term
| On engines equipped with hydraulic valve lifters, what should the running valve clearance be? |
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Definition
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Term
| What is the purpose of valve overlap? |
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Definition
| It allows better volumetric efficiency and lowers cylinder operating temperatures |
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