【名词&注释】
螺旋桨(propeller)、异常现象(abnormal phenomena)、柴油机气缸套(engine cylinder liner)、二冲程柴油机(two-stroke diesel engine)、穿透性裂纹、冷却水温(cooling water temperature)、曲轴箱油(crankcase oil)、增压器涡轮(turbine wheel)、失去平衡(off balance)
[单选题]() is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
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学习资料:
[单选题]柴油机排气系统的背压与()。Ⅰ.废气流速的平方成正比;Ⅱ.与管径的4次方成反比
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]二冲程柴油机气缸套产生穿透性裂纹,柴油机运转时就会发现()异常现象。
A. A.冷却水温度升高
B. B.膨胀水柜水位波动
C. C.滑油乳化变质
D. D.曲轴箱油(crankcase oil)位升高
[单选题]曲轴轴颈表面的腐蚀凹坑、锈斑,主要是滑油中含有()。
A. 水分
B. 酸
C. 碱
D. 水分和酸
[单选题]防止增压器涡轮(turbine wheel)壳体腐蚀的方法是()。
A. 降低冷却水进口温度
B. 选用低硫燃油
C. 选用耐蚀材料
D. 选用非冷却式的增压器
[单选题]航行中的螺旋桨故障主要有()。Ⅰ.振动;Ⅱ.鸣音;Ⅲ.失去平衡(off balance);Ⅳ.桨叶折断;Ⅴ.桨叶穴蚀。
A. Ⅱ+Ⅲ
B. Ⅰ+Ⅱ+Ⅳ+Ⅴ
C. Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ+Ⅳ
[单选题]() is fully floating in both connecting rod small end and the piston skirt.
A. The piston rod
B. The cross head pin
C. The gudgeon pin
D. The crank-pi
[单选题]After passing through the turbine the exhaust gas is conducted out into the().
A. intercooler
B. compressor
C. cylinder
D. open air
[单选题]The rate of fuel injection in a diesel engine cylinder depends primarily on ().
A. the size of the holes in the fuel nozzle
B. timing of the pump
C. supply pressure to the pump
D. shape of the combustion chamber
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