A loop or cross scavenged engine utilizes the motion of its pistons and a turbocharger to provide scavenging air. Which of the listed mechanical designs prevents the air under the pistons from being pumped back through the scavenge ports during the piston power stroke?
Official USCG Answer & Rule Citation
Correct Answer: Option C — Length of the piston skirt
Under USCG National Maritime Center examination standards, the accepted correct answer is: Length of the piston skirt.
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