【名词&注释】
性能参数(performance parameter)、发生变化
[单选题]主机主轴承磨损后,()性能参数发生变化。Ⅰ.臂距差;Ⅱ.桥规值;Ⅲ.轴承间隙;Ⅳ.曲轴轴线状态;Ⅴ.主轴颈下沉量。
A. Ⅰ+Ⅱ+Ⅲ+Ⅳ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅲ
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学习资料:
[单选题]() is sometimes used for piston cooling since leaks into the crankcase would not cause problems.
A. Diesel oil
B. Hydraulic oil
C. Lube oil
D. Mineral oil
[单选题]In general, () is suitable for delivering small quantities at high pressure.
A. reciprocating pump
B. gear pump
C. centrifugal pump
D. vane pum
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