SAT Subject Physics Practice Question 328: Answer and Explanation
The diagrammatic representation of a heat engine above shows which of the following?
A. Positive work
B. An adiabatic process
C. An isobaric process
D. An isochoric process
E. An isothermal process
Correct Answer: A
The correct answer is (A). The representation of the heat engine shows work being done by the system. The arrow from the heat reservoir points to positive work done by the system. This shows work output, which means the system does work.