4. Propulsion

Thermodynamics — Quiz

Test your understanding of thermodynamics with 5 practice questions.

Practice Questions

Question 1

Which modification to the ideal Brayton cycle most effectively reduces exhaust temperature and recovers waste heat to improve thermal efficiency?

Question 2

In an ideal Otto cycle with a compression ratio of 8 and specific heat ratio $ \gamma = 1.4 $, what is the theoretical thermal efficiency? Show your calculation.

Question 3

Which thermodynamic cycle is characterized by constant pressure heat rejection and constant volume heat addition?

Question 4

For an ideal Brayton cycle with inlet temperature $ T_1 = 300\,\mathrm{K} $, pressure ratio $ P_r = 10 $, and maximum temperature $ T_3 = 1400\,\mathrm{K} $ assuming isentropic compression and expansion with $ \gamma = 1.4 $, what is the turbine outlet temperature $ T_4 $? Show your calculation.

Question 5

The mean effective pressure (MEP) in an ideal Otto cycle is defined as which of the following?