正确答案: C
改变0.4R以外一段随边边缘厚度
题目:消除螺旋桨鸣音的方法是()。
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]对现代船舶而言,“轮机”与船舶动力装置”两词的含义是()。
基本相同的
[单选题]超级汽轮发电系统(STG)是废热利用联合装置,其余热利用装置有()。Ⅰ.废气/蒸汽联合驱动的涡轮发电机;Ⅱ.空气冷却器;Ⅲ.废气锅炉
Ⅰ+Ⅱ+Ⅲ
[单选题]As the plunger moves up, the ports are closed and the fuel () and delivered to the injector nozzle at very high pressure.
is pressurized
[单选题]Bearing knocks are likely to occur from ().
bearing wear
[单选题]The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed ().
rate of injection