Air/fuel ratios are being discussed. Technician A says that when the air fuel ratio is higher than 14.7 to 1 the engine produces more power. Technician B says that when the air fuel ratio is lower than 14.7 to 1 the engine uses less fuel. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

An air/fuel ratio higher than 14.7 to 1 means the mixture is leaner, which generally does not produce more power; it can improve fuel efficiency and reduce emissions. A ratio lower than 14.7 to 1 is richer, increasing fuel consumption, not reducing it.

Air/fuel Ratios Are Being Discussed