【名词&注释】
螺丝刀(screwdriver)、不允许(not allow)、要注意(should be noticed)
[单选题]吊缸安装活塞运动部件时,不正确的是()。
A. 不允许调换活塞运动部件的安装位置(缸号)
B. 有记号或有安装方向的不得装错或装反
C. 不允许漏装零件
D. 用手或用螺丝刀将环压入缸内
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学习资料:
[单选题]利用液压拉伸器松开螺栓前,要注意调整活塞与油缸之间的上下间隙,目的是()。
A. 防止活塞超过“最大升程”
B. 防止损坏上下密封环
C. 给螺栓提供一定的收缩量
D. 防止活塞超过“最大升程”和给螺栓提供一定的收缩量
[单选题]() are mounted on and bolted to the bed-plate cross girders.
A. The crankshaft
B. The crankcase
C. The guide-ways
D. The frame
[单选题]On most diesel engines, the governor controls the output speed by ().
A. controlling the amount of fuel injected into the cylinders
B. varying the speed of the turbocharger
C. adjusting the compression ratio
D. changing the timing of the fuel injection camshaft
[单选题]What is the effect of heated intake air on a diesel engine? ()
A. Increases efficiency
B. Increases engine horsepower
C. Increases engine life
D. Reduces engine horsepower
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