Which of these is correct regarding volumetric efficiency?
A) Engines have the same volumetric efficiency rating regardless of engine speed.
B) Naturally aspirated engines often achieve over 100 volumetric efficiency.
C) Volumetric efficiency is expressed as a percentage.
D) The most volumetric efficiency an engine could possibly have is 100.
Question 2
A naturally aspirated engine depends on ________ to push the air-fuel mixture into the combustion chamber.
A) Atmospheric pressure B) Altitude
C) Radiator airflow D) Crankcase vacuum
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