A、 Check valve, that allows fluid blows in one direction completely but blocks all flow in the other direction, is a pneumatic or hydraulic system component.
B、 One way valve is a hydro or gaseous system component that allows fluid flows in one direction freely but blocks all flow in the opposite direction.
C、 Check valve is a hydraulic or pneumatic system component that allows full flow of fluid in one direction but blocks all flow in the opposite direction.
答案：C
A、 Check valve, that allows fluid blows in one direction completely but blocks all flow in the other direction, is a pneumatic or hydraulic system component.
B、 One way valve is a hydro or gaseous system component that allows fluid flows in one direction freely but blocks all flow in the opposite direction.
C、 Check valve is a hydraulic or pneumatic system component that allows full flow of fluid in one direction but blocks all flow in the opposite direction.
答案：C
A. In order to do the engine bleed system leak check use APU to pressurize the system and check if there are leaks in the sensing tube and these system components.
B. The leak inspection of the engine bleed air system describes how to use APU to pressurize the system to inspect whether the sense lines and the system parts leak or not.
C. The way to check the leakage of the senses pipes and the system components by compressing system using APU is described.
A. 如果维护消息未在“ 电流状态”中显示,则出现了连续性故障
B. 如果维护信息未在“当前状态”中显示,则出现了间歇性故
C. 如果维护消息未在“当前状态” 中显示,则出现了次级故障。
A. 如果有必要,增加更多垫片。
B. 增加更多气源是有必要的。
C. 如有必要添加更多汽油。
A. On each page of an original document, the words “original issue”, rather than the actual date of issue, may be used. Used the title page and the table of contents page before each section of the file must be marked with the actual release date after the “original release”.
B. On each page of an original documents, the words “original issue” may be used. The actual release date is in the file and must be standard on the title page and the table of contents page before each section.
C. The actual issue date should be marked on each page of the original document An alternative might be to use the term “original issue” instead. To do so, the title page of the document and the table of contents page at the beginning of each chapter must be marked “original publication”.
A. 书写名词词组不能超过三个单词
B. 写出三个单词以上的名词词组
C. 写出的形容词词组要少与二个词
A. use the clean agent to clean the surface to remove corrosion
B. use the clean agent to clean corrosion on the surface
C. clean corrosion on the surface with the cleaner
A. 通过三个循环操作作动筒。
B. 三个周期内需要操作作动器。
C. 作动筒的操作有三个系列。
A. The output of AND gate is one when either of its inputs is logic one.
B. There is absolute no relationship between the output and input of the AND gate.
C. The output of AND gate is one only when all the inputs are logic one.
A. 左1号登机门1号地板右前边缘有一条1英寸深6英寸长的凹陷。
B. 左1号登机门1号地板离右前边缘6英寸处有一条1英寸深的凹槽。
C. 左1号登机门有一块地板到右前边缘6英寸处有一条1英寸深的凹坑。
A. In the maintenance manual, this section shall cover subjects such as power plant buildup, teardown, etc.
B. In the overhaul manual, this section shall cover subjects such as power plant buildup, teardown, etc.
C. In the overhaul manual, this section have to cover subjects such as power plant buildup, teardown, etc.
