A Carnot engine is a theoretical engine that operates on a reversible cycle of two isothermal and two adiabatic processes. It absorbs heat at a single high temperature and rejects heat at a single low temperature, making it highly efficient. Therefore, choice D is the correct answer.

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A Carnot Engine

Question 15

Multiple Choice

A Carnot engine

A) consists of only isothermal processes.
B) consists of only processes which do not involve heat flow.
C) consists of constant temperature and constant volume processes.
D) absorbs heat at a single high temperature and rejects heat at a single low temperature.
E) consists of zero heat flow and constant pressure processes.

Correct Answer: