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单选题
轴系连接误差影响曲轴轴线状态和臂距差的大小及方向？当轴系轴线低于曲轴轴线，两相邻法兰呈上开口时，连接后将使曲轴轴线产生（）变形，臂距差产生（）的变化。
A
拱腰形／负值增大
B
尾端拱腰形／负值增大
C
首端塌腰形／a．E值增大
D
塌腰形／正值增大
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更多 “单选题轴系连接误差影响曲轴轴线状态和臂距差的大小及方向？当轴系轴线低于曲轴轴线，两相邻法兰呈上开口时，连接后将使曲轴轴线产生（）变形，臂距差产生（）的变化。A 拱腰形／负值增大B 尾端拱腰形／负值增大C 首端塌腰形／a．E值增大D 塌腰形／正值增大” 相关考题
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Ⅱ、ⅢB
Ⅰ、Ⅱ、ⅢC
Ⅲ、ⅣD
Ⅰ、Ⅱ、Ⅲ、Ⅳ
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excessive valve-guide clearanceC
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ignition temperatureB
flash pointC
flammable rangeD
convection index
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①、③C
②、③D
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speed settingsB
speed droopsC
speed dropsD
speed changes
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overloadingB
over dischargingC
overflowD
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various lengths of timberC
structural shapes used in constructionD
viscosities of liquid cargoes
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