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110. Crankcase explosions in propulsion diesel engines can result from which of the following?
Crankcase explosions result from the ignition of vaporized lubrication oil within the crankcase, creating a rapid pressure increase. This ignition requires fuel (vaporized oil), oxygen (air), and an ignition source, and is distinct from normal oil splashing, oil dilution, or external fuel leaks, which are related but not causative factors.
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