Precombustion chambers, and energy cells in high-speed, small bore diesel engines all serve to increase ________.
Official USCG Answer & Rule Citation
Correct Answer: Option D — turbulence
Precombustion chambers and energy cells restrict fuel-air mixtures during injection and compression, creating high-velocity squish and swirl. This intense air turbulence accelerates fuel vaporization, mixing, and complete combustion within high-speed, small-bore diesel engines.
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