The thermal efficiency of an internal combustion engine varies( )
a.Inversely as sfc
b.Directly as sfc
c.As square as sfc
d. As root sfc
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Answer:
A
Explanation:
Modern gasoline engines have a maximum thermal efficiency of about 20% to 35% when used to power a car. ... At high speeds, efficiency in both types of engine is reduced by pumping and mechanical frictional losses, and the shorter period within which combustion has to take place.
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