All of the following statements are correct EXCEPT:
A) a higher compression ratio can increase an engine's power and fuel economy.
B) compression ratio has an effect on the amount of power an engine can produce by increasing the thermal efficiency of the engine.
C) compression pressure is the amount of pressure made by the piston moving up in the cylinder in pounds per square inch (psi) or kilopascals (kPa).
D) higher compression engines produce less exhaust emissions.

Question

Quizplus · Accepted Answer

Higher compression engines tend to produce more NOx emissions due to higher combustion temperatures, which can contradict the statement that they produce less exhaust emissions overall. While they may be more efficient and have other emission benefits, the specific claim about less exhaust emissions is not universally correct.

All of the Following Statements Are Correct EXCEPT