Here some oil in the oily water separator, as a result of it

【名词&注释】

可靠性(reliability)、螺旋桨(propeller)、柴油机(diesel engine)、主要因素(main factors)、进排气阀(inspiration exhaust valve)

[单选题]Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.

A. temperature
B. viscosity
C. density
D. velocity

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学习资料：

[单选题]航行中对发电柴油机曲轴的断裂可以应急焊接修理，并进行封缸以维持柴油机运转。封缸的正确操作应该是（）。Ⅰ.停止燃烧；Ⅱ.降速运行；Ⅲ.吊出活塞连杆；Ⅳ.封死气缸启动阀；Ⅴ.关闭进排气阀^{(inspiration exhaust valve)}。

A. Ⅰ＋Ⅱ
B. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ
C. Ⅰ＋Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅴ

[单选题]当气阀阀面烧穿出现边缘孔洞时应（）工艺修复。

A. 喷涂或喷焊
B. 换新
C. 堆焊
D. 镀铬或镀铁

[单选题]中间轴承对轴系可靠性影响的主要因素是中间轴承的都不对（）。Ⅰ.位置；Ⅱ.数量；Ⅲ.间距

A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]由于螺旋桨的（）失效会导致船舶剧烈振动。

A. 桨叶严重腐蚀
B. 桨叶严重磨损
C. 桨叶变形
D. 某一桨叶折断

[单选题]Each cylinder has one starting valve which is usually opened by air pressure and closed by （）

A. nuts and bolts
B. new joints
C. spring force
D. sealing ring

[单选题]The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.

A. crack
B. knocking
C. leaking
D. seizure

[单选题]The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.

A. gear
B. nonpositive displacement
C. positive displacement
D. rotary

[单选题]Most fuel injection nozzles are opened by （）.

A. fuel oil pressure
B. a cam operated follower
C. a spring-loaded pressure plate
D. timing gears keyed to the crankshaft

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