【名词&注释】
磨损率(wear rate)、特殊性(particularity)、液压油(hydraulic oil)、动力装置(power plant)、气缸套(cylinder liner)
[单选题]由于船舶的特殊性,使动力装置的可靠性更为重要和复杂。它与下列因素有关()。Ⅰ.各组成设备的可靠性;Ⅱ.各组成设备的维修性;Ⅲ.管理人员的因素
A. 仅Ⅰ对
B. Ⅰ+Ⅱ
C. Ⅰ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
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学习资料:
[单选题]柴油机镀铬气缸套(cylinder liner)正常磨损率应在()mm/kh范围内。
A. 0.1~0.3
B. 0.05~0.1
C. 0.01~0.03
D. 0.005~0.01
[单选题]当液压拉伸器的用油变质时,应当用()来清洗和替代。
A. 适合黏度的透平油
B. 适合黏度的油缸油
C. 适合黏度的液压油
D. 适合黏度的透平油或液压油
[单选题]在船上测量曲轴臂距差时,以曲柄销位置为准记录臂距值时,应自()开始测量。
A. 曲柄销位于195°处
B. 曲柄销位于165°处
C. 曲柄销位于15°处
D. 曲柄销位于345°处
[单选题]导致曲轴轴线产生塌腰形变形,臂距差朝正值增大方向变化的因素有()。Ⅰ.爆发压力;Ⅱ.飞轮重量;Ⅲ.曲轴自重;Ⅳ.活塞装置重量;Ⅴ.轴系轴线低于曲轴轴线,两法兰呈上开口。
A. A.Ⅰ+Ⅲ+Ⅳ
B. B.Ⅲ+Ⅳ
C. C.Ⅲ+Ⅳ+Ⅴ
D. D.Ⅰ+Ⅴ
[单选题]In the () pressure charging system the pulse of energy that occur as the exhaust is released from the cylinder to improve the output of the turbocharger.
A. constant
B. pulse
C. high
D. none of the above
[单选题]In the suction stroke air is induced into the cylinder ()In the compression stroke the air is compressed.
A. by an fuel valve
B. through an inlet valve
C. with an exhaust valve
D. from an outlet valve
[单选题]The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and () of the pistons in the cylinders.
A. crack
B. knocking
C. leaking
D. seizure
[单选题]Which factor of the following affects not only the fuels combustion but also the engine’s maintenance?()
A. cetane number
B. flash point
C. viscosity
D. setting point
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