海船船员考试

单选题Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.A catch platesB dampersC regulating valvesD fans

题目
单选题
Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.
A

catch plates

B

dampers

C

regulating valves

D

fans

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相似问题和答案

第1题：

In an air conditioning system, moisture is removed from the air by ______.

A.filters

B.separators

C.ducted traps

D.dehumidifiers


正确答案：D

第2题：

According to this passage, which of the following statements is true?

A.In boiler and machinery spaces, there is the air conditioning.

B.In the boiler rooms the requirement of air volume should meet 25-50% of combustion requirement.

C.To maintain the comfort zone in the separate control room the air conditioning plant should be fitted.

D.The comfort conditions can be maintained in the engine room all the time.


正确答案：C

第3题：

Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?

A.Cooling the air to a temperature just above dew point

B.Heating the air to a point at which moisture will boil off ,then re-cooling it

C.Cooling the air to a point below dew point, then reheating it

D.Heating the air and then cooling it to a point below dew point


正确答案：C

第4题：

According to the following statement， can you tell me which term is described？（） It is the air return for an air conditioned system. In most buildings， the area above a drop ceiling orunder a raised floor is used as the air return （source of air） for the air conditioning. Those drop ceiling and raised floors are also where wire is often installed. If wire and cable is installed in a dropceiling or raised floor， it is out of sight. If that cable were burning， it would give off toxic fumes.These would be fed to the rest of the building by the air conditioner. As a result， people could beinjured even though they are a long way from the fire.

  • A、DAS area
  • B、plenum area
  • C、extended area
  • D、RF special area

正确答案:B

第5题：

Heating，ventilating，and air conditioning（HVAC） systems are______in most of underground subway stations to provide comfortable and fresh air to underground subway stations。

A.assembled
B.installing
C.equipped
D.installed

答案：D
解析：
本题考查动词的词义辨析。题目意为“大多数地下地铁车站都安装了供暖、通风和空调系统，为地下地铁车站提供舒适和新鲜的空气。”A选项“装配，集合”，B选项“安装”，C选项“装备”， D选项“（被）安装”。由于主语是物，和动词“安装”之间构成被动关系，因此要选择“（被）安装”。
　　

第6题：

From 1800 to 1968 Admiralty charts were published with fathoms and feet as the units for depths，and feet as the units for height．Since 1968 Admiralty charts ________ to meters，thus conforming with charts of most other countries．

A.gradually converted

B.have been gradually converted

C.has been gradually converted

D.is gradually converted


正确答案：B

第7题：

According to the passage, what is one disadvantage of skyscrapers that have mirroredwalls?__________

A.The exterior surrounding air is heated
B.The building materials are very expensive
C.Construction time is increased
D.Extra air-conditioning equipment is needed

答案：A
解析：
细节理解题。文章的第三段最后一句谈到了这一点：“However，mirror-walled skyscrapersraise the temperature of the surrounding air and affect neighboring buildings．”即The exterior surrounding air isheated．(摩天大楼周围外表空气升高了。)

第8题：

According to the passage，what is one disadvantage of skyscrapers that have mirrored walls?

A. The exterior surrounding air is heated。

B. The windows must be cleaned daily.

C. Construction time is increased.

D. Extra air-conditioning equipment is needed.


正确答案：A
[解析] 见第三段最后一句话，“装有镜面墙的摩天楼会加热它周围空气的温度，也会影响周围的建筑物”。

第9题：

Would you like the air-conditioning on?的意思是：（）？


正确答案:您需要打开空调吗

第10题：

IPC的UNITS/ASSY栏中，字母AR代表什么

  • A、AIR RADIO
  • B、AIR TRANSPORT
  • C、AS REQUIRED

正确答案:C

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