A spark plug fires before the gases in a cylinder are fully compressed. How will the engine be affected?

Question

A spark plug fires before the gases in a cylinder are fully compressed. How will the engine be affected?

A. The engine will get better gas mileage as less fuel is burned during each cycle.
B. There will be fewer pollutants as the fuel has more time to burn.
C. The gases will do less work to the piston because the gases cannot expand as much.
D. The engine will not get hot because the ratio of work to heat will increase.

Is the answer C?

Answer 1

Yes, the correct answer is C. When a spark plug fires before the gases in a cylinder are fully compressed, the gases will have less time to fully expand. As a result, they will do less work on the piston, reducing the engine's overall efficiency.

Answer 2

Yes, the answer is C. When a spark plug fires before the gases in a cylinder are fully compressed, it means that the ignition happens earlier in the combustion process. As a result, the gases will not be able to fully expand and do as much work on the piston. This can lead to a decrease in power output and overall engine performance. So, C is the correct answer as it describes the impact of the ignition timing on the work done by the gases on the piston.

A spark plug fires before the gases in a cylinder are fully compressed. How will the engine be affected?

Yes, C.

Yes, the correct answer is C. When a spark plug fires before the gases in a cylinder are fully compressed, the gases will have less time to fully expand. As a result, they will do less work on the piston, reducing the engine's overall efficiency.