连杆大小端孔中心线的平行度偏差不应超过（）。

【名词&注释】

动力装置(power plant)、排水量(displacement)、中心线(center line)、总重量(total weight)

[单选题]连杆大小端孔中心线的平行度偏差不应超过（）。

A. A．0.05mm/m
B. B．0.10mm/m
C. C．0.15mm/m
D. D．0.20mm/m

查看答案&解析 查看所有试题

学习资料：

[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^{(total weight)}为8O0t，则该船主机单位重量为（）kg/kW。

A. 35
B. 80
C. 40
D. 17.5

[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。

A. A．弯曲/正值增大
B. B．首端塌腰/正值增大
C. C．首端上拱/负值增大
D. D．拱腰形/负值增大

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

A. a high exhaust temperature
B. a high smoky exhaust
C. a high output
D. a high compressio

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

A. after TDC
B. before TDC
C. after BDC
D. before BDC

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

A. not be changed
B. be changed
C. should not be changed
D. should 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.

A. cylinder liners and piston rings
B. main bearings
C. crankpin bearings
D. turboblower

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

A. connecting rods
B. crankshaft
C. crankcase
D. through bolt

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

A. the beginning of the compression stroke
B. the beginning of the suction stroke
C. the end of the working stroke
D. the end of the exhaust stroke

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

A. of the diaphragm type
B. of the centrifugal type
C. of the positive displacement type
D. independently driven by electric motor

本文链接：https://www.51bdks.net/show/3x34kd.html