In order to operate, a heat engine must have
A) either a hot or a cold reservoir.
B) both a hot and a cold reservoir.
C) a boiler.
D) a supply of fuel that can be burned, such as coal or oil.

Question

Quizplus · Accepted Answer

A heat engine operates by transferring heat from a hot reservoir to a cold reservoir, causing a working substance (such as gas or steam) to undergo a series of changes in pressure and volume that ultimately produce mechanical work. Therefore, a heat engine must have both a hot and a cold reservoir in order to function. A boiler and a supply of fuel may be necessary components of some heat engines, depending on their design and fuel source, but they are not a universal requirement for all heat engines.

In Order to Operate, a Heat Engine Must Have