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2.Directions:In this section, you are going to read a passage with ten statements attached toit. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter onAnswer Sheet 2

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液压传动系统中,常用的的压力控制阀是()

A. 节流阀
B. 调速阀
C. 溢流阀
D. 减压阀
E. 顺序阀
F. 单向阀
G. 换向阀

液压传动系统中,常用的方向控制阀是()

A. 节流阀
B. 调速阀
C. 溢流阀
D. 减压阀
E. 顺序阀
F. 单向阀
G. 换向阀

为保护液压泵不致吸入较大机械杂质的滤油器应安装在()。

A. 泵吸油口
B. 泵出口油路上
C. 系统回油管路上
D. 系统的分支油路上

在先导式减压阀工作时,主阀的作用主要是()。

A. 减压
B. 增压
C. 调压

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