In an engine operating in the Otto cycle, the final volume of the ...

[Deast7027]

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.

[bitingbit]

Answer to Question 1

c

Answer to Question 2

b

[Deast7027]

Thanks for the timely response, appreciate it

[kjohnson]

Excellent