正确答案: C

C．0.15mm/m

题目：连杆大小端孔中心线的平行度偏差不应超过（）。

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学习资料的答案和解析：

[单选题]已知某船排水量为2O000t，主机有效功率为10O00kW，主机重量为350t，动力装置总重量为8O0t，则该船主机单位重量为（）kg/kW。

35

[单选题]艉机舱船装载后将会引起曲轴轴线发生（）变形，臂距差的大小和方向呈（）变化。

C．首端上拱/负值增大

[单选题]Either a low injection pressure or a leakage of piston rings is able to lead （）.

a high smoky exhaust

[单选题]In an ordinary diesel engine the fuel injection begins （）

before TDC

[单选题]It is important that the water （） very often as this can lead to increased deposits.

not be changed

[单选题]Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.

cylinder liners and piston rings

[单选题]Smaller engines can be made more rigid than large ones and may not have （）.

through bolt

[单选题]The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.

the beginning of the compression stroke

[单选题]Lube oil pumps taking suction from the sump of most small marine engines are usually （）.

of the positive displacement type