[单选题]船舶有效功率与主机有效功率的差值,是存在着()所造成的。
正确答案 :D
A+B
[单选题]防止增压器振动的措施包括()。Ⅰ.定期换新轴承;Ⅱ.定期清洗叶片;Ⅲ.定期检查安装间隙;Ⅳ.转子定期检查磨损和变形;Ⅴ.转子定期作动平衡试验。
正确答案 :A
Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
[单选题]大型海船艉轴工作轴颈较长,所包覆的铜套过长,加工和安装均不便,故将铜套分段加工、套合,但必须保证()的水密性。
正确答案 :C
接缝处
[单选题]Lubricating oil for an engine is stored at the bottom of the (), known as the sump or in a drain tank located beneath the engine.
正确答案 :C
crankcase
[单选题]The high pressure in fuel injection system of the diesel engine is produced by the ().
正确答案 :A
injector pump
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