Of the following heat engines,which has the highest efficiency?
A)Hero's engine
B)a Carnot engine
C)a car's gasoline engine
D)a truck's diesel engine

Question

Quizplus · Accepted Answer

A Carnot engine has the highest efficiency among all heat engines because it operates in a reversible cycle, which means that all the energy put into the engine is converted into work without any loss. This is not true for the other engines given as options. Hero's engine is a simple steam engine with low efficiency. Car's gasoline engine and truck's diesel engine are internal combustion engines and have efficiency around 25-50%, which is considerably lower than a Carnot engine.

Of the Following Heat Engines,which Has the Highest Efficiency