Multiple choice

In two air standard cycles - one operating on the Otto and the other on the Brayton cycle - air is entropically compressed from 300 K to 450 K, heat is added to raise the temperature to 600 K in the Otto cycle and to 550 K in the Brayton cycle. If $\eta_0$ and $\eta_B$are the efficiencies of the Otto and Brayton cycles, then

  1. $\eta_0=0.25,\eta_B=0.18$
  2. $\eta_0=\eta_B=0.33$
  3. $\eta_0=0.25,\eta_B=0.45$

  4. it is not possible to calculate the efficiencies unless the temperature after the expansion is given.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Keep practicing — related questions