【名词&注释】
使用情况(service condition)、活塞杆(piston rod)、中心线(center line)、固定式(fixed)、活塞式(piston)、动平衡试验(dynamic balance test)、符合要求(meet the requirement)、增压器转子(blower rotor)
[单选题]筒状活塞式柴油机活塞运动部件平台检验相对位置的技术要求是()。
A. 活塞裙外圆与活塞杆外圆同轴度符合要求(meet the requirement)
B. 活塞中心线与活塞销中心线垂直、相交
C. 连杆与活塞装配后连杆大、小端轴承孔中心线平行
D. 装配后活塞中心线与连杆大端轴承孔中心线垂直、相交
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学习资料:
[单选题]并联连接系统按照部件的连接情况可分为备用部件和基本部件,根据使用情况有()。Ⅰ.固定式连接热态(在负荷下)各用方式;Ⅱ.固定式连接冷态(在无负荷下)各用方式;Ⅲ.不固定式(流动式)连接各用方式
A. Ⅰ十Ⅱ
B. Ⅰ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]()时应对增压器转子(blower rotor)进行动平衡试验(dynamic balance test)。
A. A.更换轴承
B. B.更换部分叶片
C. C.定期清洗
D. D.更换气封或油封
[单选题]A diesel engines crankcase oil level is found to be too high√ You should suspect that ().
A. the engine was over filled
B. there might be a fuel leak
C. there might be a water leak
D. all of the above
[单选题]Additives () protective layers on metal surfaces guarding them against corrosion.
A. damage
B. form
C. dissolve
D. contaminate
[单选题]Diesel oil may be used to cool () of a diesel engine.
A. cylinders
B. exhaust valves
C. pistons
D. fuel valve
[单选题]High diesel engine cooling water temperatures can be caused by ().
A. air in the cooling system
B. an overhauled water pump
C. correct amount of coolant
D. no air in the cooling system
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