Question 68Motor Plants - QMED

The correct answer is C) crankshaft. The crankshaft is the component that converts the linear motion of the diesel engine piston into the rotary motion required to drive gears, propeller shafts, and generators. The crankshaft is connected to the piston via the connecting rod, and as the piston moves up and down, the crankshaft rotates, providing the necessary rotary motion to power the various components of the engine and propulsion system. The other options are incorrect because they do not directly convert the linear piston motion into rotary motion. Journal bearings support the rotating crankshaft, the camshaft controls the opening and closing of the engine valves, and the flywheel helps to smooth out the rotational motion, but they do not directly convert the piston's linear motion into the required rotary motion.