Question 116Motor Plants - Assistant Engineer70% to pass
Cast iron pistons used in large propulsion diesel engines are constructed with_______________.
AI Explanation
The correct answer is D) the crown being tapered and smaller than the skirt.
In large propulsion diesel engines, cast iron pistons are designed with a tapered crown, which is smaller in diameter than the skirt. This design feature helps to improve the piston's stability and reduce wear within the cylinder. The tapered crown allows for better control of the piston's movement and helps to distribute the forces more evenly, which is important for the durability and performance of the engine.
The other options are incorrect because they do not accurately reflect the typical construction of cast iron pistons used in large diesel engines. A piston with no taper (option A), a skirt that is tapered and smaller than the crown (option B), or a skirt that is tapered and larger than the crown (option C) would not be the optimal design for this type of engine application.
Related Questions
#114 While underway, which of the following would be the FIRST step in reversing a direct reversing large, slow-speed, main propulsion, diesel engine? #115 In a large slow-speed propulsion diesel engine, the force applied to the piston is_______________.#117 Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured? #118 In the slow-speed diesel engine shown in the illustration, the part labeled "E" is the_______________. Illustration MO-0003 #119 During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to changing the engine rotation for a vessel with moderate headway?