【名词&注释】
活塞式空压机(piston air compressor)、喷油器(injector)、二冲程(two-stroke)、游标卡尺(vernier caliper)、落水者(fall in water person)、活塞环断裂(piston ring breakage)
[单选题]V型柴油机在拆装活塞时，最容易出现的损伤是________。
A. 活塞环断裂(piston ring breakage)
B. 连杆大端碰伤缸套
C. 活塞卡在缸套内
D. 连杆大端碰伤曲轴
查看答案&解析
举一反三：
[单选题]During UMS rounds, a duty engineer notices that the fuel oil overflow observation glass is full of oil. Should he ____.
A. Stop all F.O. transfers immediately, and inform the chief engineer.
B. Make a sounding of the F.O. overflow tank and decide if there is enough capacity to leave it until the following morning.
C. Call a motorman and have him sound the F.O. overflow tank periodically during the night.
D. start the F.O. purifier
[单选题]Electric insulation is made of organic substances and so gradually______with age
A. deteriorates
B. increases
C. are fouled
D. becomes better
[单选题]落水者(fall in water person)在水温为0℃的情况下，只能维持生命约：
A. 15分钟
B. 30分钟
C. 45分钟
[单选题]必要时常用( )方法检查活塞式空压机的余隙高度。
A. 塞尺测量
B. 千分卡测量
C. 游标卡尺测量
D. 压铅
[单选题]筒状活塞冷却侧的裂纹常发生在
A. 截面变化处
B. 活塞销座
C. 有缺陷处
D. 内孔壁面
[单选题]当代船用二冲程超长行程柴油机使用的无冷却式喷油器的优点是( )。Ⅰ.结构简单;Ⅱ.备车时可对喷油器预热;Ⅲ，机动航行时不必换油;Ⅳ.喷油器驱气。
A. Ⅰ+Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅱ+Ⅲ+Ⅳ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]求援是海上急救的：
A. 原则之一
B. 目的之一
C. 主要方法
D. 必要手段
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