Question

Which of the following statements correctly describes the position on the intake of the exhaust valves during most of the power stage in a four cycle gas engine

Answer 1

The correct option is this: BOTH THE INTAKE VALVE AND THE EXHAUST VALVES ARE CLOSED.
The four cycle gas engine is a type of internal combustion engine that complete four separate stroke while turning the crank shaft. The four strokes are: intake, compression, combustion and exhaust. The combustion stage is also known as power or ignition stage. During the power stage, the intake and the exhaust valves of the engine are closed in order to maximize pressure.