11. Which of the listed design features is most common with a two-stroke cycle, low-speed main propulsion diesel engine?

Large, low-speed, two-stroke diesel engines utilize piston rod and crosshead construction. This design separates the combustion space from the crankcase, enabling long strokes and improved lubrication, and is a defining characteristic of these engines, distinguishing them from those employing trunk pistons, V configurations, or reduction gearing.