In a large slow-speed propulsion diesel engine, the side thrust on the crosshead is the direct result of _____.

Correct Answer: Option B — the angularity of the connecting rod against the crosshead during the power stroke

As the connecting rod assumes an angle relative to the vertical centerline of the cylinder during the power stroke, the vertical force from the piston creates a horizontal component. This lateral force is absorbed by the crosshead shoes against the guide bars.