【名词&注释】
松紧度
[单选题]在用液压拉伸器检查底脚螺栓的松紧度时,底脚螺栓螺帽附近的机座平面(用于支撑拉伸器的平面)一定要清洁干净,否则可能导致()。
A. 液压拉伸器内部的密封环损坏漏油
B. 液压拉伸器产生的拉力过大
C. 液压拉伸器产生的升程过大
D. 液压拉伸器产生的拉力过大和液压拉伸器产生的升程过大
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学习资料:
[单选题]A thrust block is designed to().
A. absorb the shock of wave pressure at the bow
B. be placed between the engines and the foundation to absorb the vibration
C. transmit the thrust of the engine to the propeller
D. transmit the thrust of the propeller to the vessel
[单选题]What is the purpose of the intake/exhaust valves in a diesel engine? ()
A. They regulate the combustion cycle
B. They supply cooling water
C. They synchronize the ignition spark
D. They supply and regulate the lubricant flow
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