[单选题]气缸套内圆表面采用（）加工，是防止拉缸事故的工艺措施之一。Ⅰ.珩磨；Ⅱ.振动；Ⅲ.机械；Ⅳ.波纹；Ⅴ.磨削。

正确答案 ：A

Ⅰ＋Ⅱ＋Ⅳ

[单选题]（）柴油机活塞运动部件在船上安装前必须先进行车间平台复验其相互位置精度。

正确答案 ：C

新造或大修的主

[单选题]Cast iron carrier rings, （） machined grooves, are provided for all the pistons.

正确答案 ：A

caulked into

[单选题]In an ordinary four-stroke engine the exhaust valves open （）

正确答案 ：D

before BDC

[单选题]Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.

正确答案 ：A

make sure

[单选题]The cylinder cover is not provided with （）.

正确答案 ：B

lubricator

[单选题]The quantity of oil injected into the cylinder can be regulated （）.

正确答案 ：A

by turning the pump plunger

[单选题]Impurities in the fuel oil will affect the operation of the engine, which has （） the use of separator and some other devices.

正确答案 ：A

brought about

[单选题]How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）

正确答案 ：D

Eight

[单选题]A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）.

正确答案 ：A

areas where special materials are used

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