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4 Answer: b
(C1, Four Strike Engines)
5.
If the fuel air mixture is too rich:
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the mixture burns faster causing the cylinders to be subjected to heat for a shorter period of time, resulting in a cooler running engine
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the mixture burns faster causing the cylinders to be subjected to a very high heat. resulting in a hotter running engine
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the mixture burns slowly, subjecting the cylinders to heat for a longer period, which may result in over heating the cylinder heads
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the mixture burns slowly, subjecting the cylinders to a very low heat, resulting in a cooler running engine
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