Question 100Motor Plants - Assistant Engineer

The correct answer is B) H. On the cylinder indicator diagram illustrated in MO-0033, the maximum rise in pressure occurs during the period labeled as H, which represents the compression stroke of the engine. During this stroke, the piston moves upward, compressing the air-fuel mixture in the cylinder, leading to a rapid increase in pressure within the cylinder. The other options are incorrect because: A) G represents the exhaust stroke, where the pressure is decreasing as the piston moves downward and the exhaust gases are expelled from the cylinder. C) J represents the power stroke, where the pressure is still high but has already reached its peak during the compression stroke (H). D) K represents the intake stroke, where the pressure is decreasing as the piston moves downward and the air-fuel mixture is drawn into the cylinder.