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Engine : Motor Plants and Auxiliary Boilers - 1273/947
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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?
A) Positive pressure from the blower
B) Masked intake ports
C) Length of the piston skirt
D) Lower liner seals
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