题目
The_engine usually be directly coupled to the propeller as the maximum efficiency of each can be matched at a suitable rotational speed.A. medium speed two-strokeB. high speed four-strokeC. slow speed two-strokeD. medium speed four-stroke
The_engine usually be directly coupled to the propeller as the maximum efficiency of each can be matched at a suitable rotational speed.
A. medium speed two-stroke
B. high speed four-stroke
C. slow speed two-stroke
D. medium speed four-stroke
题目解答
答案
C. slow speed two-stroke
解析
船舶推进系统中，发动机和螺旋桨的效率匹配非常重要。慢速二冲程发动机（slow speed two-stroke）通常用于大型船舶，其设计目的是在低转速下提供高扭矩，这与螺旋桨的高效工作条件相匹配。因此，慢速二冲程发动机通常直接与螺旋桨耦合，以确保两者在合适的转速下达到最大效率。