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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