Author Question: In an engine operating in the Otto cycle, the final volume of the fuel-air mixture is one sixth the ... (Read 53 times)

Deast7027 · **on:** Jul 28, 2018

In an engine operating in the Otto cycle, the final volume of the fuel-air mixture is one sixth the initial volume. Assume = 1.4 . The maximum theoretical efficiency of this cycle, in per cent, is
a. 17.
b. 49.
c. 51.
d. 56.
e. 83.

Question 2

All real engines are less efficient than the Carnot engine because
a. they do not operate through the Otto cycle.
b. they do not operate through a reversible cycle.
c. the working substance does not maintain a constant volume through the cycle.
d. the working substance does not maintain a constant pressure through the cycle.
e. the working substance does not maintain a constant temperature through the cycle.