航空工程英语基础（中英文对照）(5)

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the ambient pressure would be 4.36 psi . The cabin altitude can be measured by
adding the ambient pressure to the 7.80 psid maintained in side the airplane by the
pressurization system:
ambient pressure 4.36 psi at 30,000 ft.
pressure differential 7.80psid
12.16psi
By referring to the chart depicting
ambient pressure versus altitude, if
the ambient pressure is 12.16 psi,
the cabin altitude would be 5150 ft
( see figure 4-3）
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5 The cabin pressure is referred to as“psid”and indicates the differential
pressure, in pounds per square inch ,between inside and outside of the airplane.
There are many systems for measuring pressure and“psi”is only one. Airplane
systems measure pressure in inches of mercury and millibars; these indications are
seen on altimeters as 29.92 (inches of mercury) and 1013(millibars). Both are
identical to 14.7 psi as a measurement of the pressure exerted by the atmosphere at
sea level.
6 The pressure control systems provide cabin differential pressure by controlling
the outflow of air from the faselage. The pressure control system consists of an aft
outflow valve, forward outflow valve, pressure controller, control panel, pressure
sensing inputs, and monitoring indicators .
7 The aft outflow valve allowing cabin air to exhaust overboard to maintain cabin
pressure . The forward outflow valve receives a control signal from the aft outflow
valve . When the aft outflow valve is closed , the forward outflow valve receives a
signal to drive full closed .
EXERCISE
A. Find out the explanations of the following words in your “English-chinese
technical dictionary”
1. cabin altitude  P1-25 
2. outflow valve  P1-110 
3. cruise  P1-38 
4. ambient pressure  P1-9 
5. atmospheric pressure  P1-14 
6. millibars [ P1-101 ]
7. sea level [ P1-130 ]
8. climb [ P1-30 ]
9. signal [ P1-136 ]
B. Read the text loudly and clearly.
Fig 4-3 Altitude - ambient press .curve
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LESSON 5
FIRE DETECTION
VOCABULARY
1. fire detection  ai   di tekn  火警探测
2. monitor  m nit  n. 监控
3. component  kmpunnt  n. 部件;组成部分
4. overheat  uvhi:t  n. 过热;v. 过度加热
5. occur   k:  vi. 发生;出现
6. panel  pænl  n. 面板
7. wing  wi  n. 机翼
8. lavatory  lævtri  n. 洗脸间;厕所
9. optional   pnl a. 可选的
10. feature  i:t  n. 特征;零配件
11. available  veilbl  a. 可用的;适用于……的;可买到(提供)的
12. location  lu kein  n. 位置
13. element  elimnt  n. 元件;部件
14. around   raund  perp. 在……周围;环绕着……
15. exist  ig zist  vi. 存在;有
16. alarm  la:m  n. 警报; 警告
17. bell  bel  n. 铃(钟)声
18. aural   :rl a.; n. 听觉(的); 音响(的)
19. device  divais  n. 器件; 装置
20. extinguisher  ikstigwi  n. 灭火器
21. bottle  b tl  n. 瓶
22. corner  k :n  n. 角落
23. wheel  hwi:l  n. 轮子
24. discharge  dis ta:d  v. 卸载;放出;解除
25. accomplish   k mpli  vt. 完成;达到目的
26. ceiling  si:li  n. 天花板;顶板
27. module  m :dju:l  n. 组件
28. leak  li:k  n.; v. 泄漏
29. horn  h :n  n. 角(状物);喇叭;报警器
30. specify  spesifai  vt. 规定;指定;确定
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31. beneath  bi ni:  prep. 在……之下;在……底下
32. respond to 与……相对应; 对……有反应
33. basin  beisin  n. 盆; 槽
34. towel chute  taul   u:t  擦手纸斜槽
TEXT
1 The fire detection systems monitor airplane components for overheat, fire or
　
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