I got an 86%. Reviewing the test I should have got a 92%. Three stupid mistakes where I didnt pay attention, the only four I genuinely did not know were the questions about the pulleys and force. Dumb on my part.
And yes I agree question 48 was stupid. I think it really is both. Without the low pressure area created by the piston there would not be a place for the atmospheric pressure to go. But the atmospheric pressure does push it in, and the amount of atmospheric pressure does affect how much air goes in. If it was just the piston suction alone then I would think a naturally aspirated engine would make the same power regardless of altitude. Yet an engine makes 18% less power here in Denver than at sea level.
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