相关试题
【单选题】
[54]液相干燥器D-210运行周期为___。
A. 24小时
B. 48小时
C. 30小时
D. 45小时
【单选题】
[55]C-201二段吸入罐V-202设计压力接近___。
A. 1.0MPa
B. 1.4MPa
C. 0.70MPa
D. 0.45MPa
【单选题】
[56]C-201四段排出罐V-205设计压力接近___。
A. 1.6MPa
B. 1.76MPa
C. 2.50MPa
D. 1.40MPa
【单选题】
[57]C-201T低速止点___rpm。
A. 4793rpm
B. 3914rpm
C. 4892rpm
D. 5137rpm
【单选题】
[58]C-201T正常转速___rpm。
A. 4793rpm
B. 3914rpm
C. 4892rpm
D. 5137rpm
【单选题】
[59]C-501T正常转速___。
A. 3925
B. 3565
C. 4194
D. 4404
【单选题】
[60]乙烯的临界温度是___。
A. -7℃
B. 9.9℃
C. +7℃
D. -21℃ .
【单选题】
[61]C-601开车时，怎样保持致冷系统所需负荷___。
A. 投用冷户
B. 不投用冷户
C. 投用一半冷户
D. 投用三分之二
【单选题】
[62]超高压蒸汽作为用户是___。
A. C-201-X1-P1
B. C-601
C. P-101
D. C-201
【单选题】
[63]T-203强碱的设计的冲洗液是___。
【单选题】
[64]C-601冷剂级位是___.
A. -65℃
B. -21℃
C. -40℃
D. +7℃
【单选题】
[65]C-501T采用形式___。
A. 抽气冷凝式
B. 全凝式
C. 背压式
D. 排汽式
【单选题】
[66]C-601T采用形式___。
A. 抽气冷凝式
B. 全凝式
C. 背压式
D. 排汽式
【单选题】
[67]C-201SD不包括___。
A. 排汽温度
B. 手动
C. 液位
D. 真空度低
【单选题】
[71]三机润滑油管线的进油管线与回油管线相比___( )
A. 进油管线细,回油管线粗
B. 进油管线粗,回油管线细
C. 进油管线和回油管线大小一样
D. 进油管线与回油管线大小不作要求
【单选题】
[72]T-203设水洗段的目的___( )
A. 脱除裂解气中残余的二氧化碳气体
B. 脱除裂解气中残余的硫化氢气体
C. 脱除裂解气中夹带的气油
D. 脱除裂解气中夹带的碱,减少碱的损失和保护设备.
【单选题】
[73]氢气的爆炸极限(体积百分比)约为___( )
A. 4.0～75%
B. 8～60%
C. 2～90%
D. 10～80%.
【单选题】
[74]C-201透平暖机方式为___。
A. 半弧暖机
B. 全弧暖机
C. 背压暖机
D. 抽汽暖机
【单选题】
[75]哪个不是C-201带联锁的吸入罐___。
A. V-201
B. V-202
C. V-203
D. V-205
【单选题】
[76]C-501给___个冷户提供冷量.
【单选题】
[77]C-501有___个回收冷量的用户.
【单选题】
[78]压缩机油路系统经贮压器内充的气体是 ___
A. 氮气
B. 氢气
C. 氧气
D. 一氧化碳
【单选题】
[79]三机的润滑油压力是 ___
A. 100KPa
B. 150KPa
C. 200KPa
D. 250KPa
【单选题】
[80]节流式测量装置在管道上装反会造成___
A. 差压计倒指示
B. 差压计指示变小
C. 指示变大
D. 无任何影响
【单选题】
[81]丙烯压缩机密封型式___。
A. 干气密封
B. 浮环密封
C. 机械密封
D. 迷宫密封.
【单选题】
[82]所有离心式压缩机___临界转速
A. 都有
B. 不一定都有
C. 均没有
D. 有一个
【单选题】
[83]压缩机开车后二级密封气在___时投用。
A. 500rpm
B. 1000rpm
C. 最小可调转速
D. 正常运行转数
【单选题】
[84]干气密封是一种非接触密封，动静环用___隔开。
【单选题】
[85]压缩机油路系统酸洗的目的是为了除去高温氧化铁皮___等，使系统金属表面清洁。
【单选题】
[86]C-501汽轮机入口蒸汽温度正常值为___。
A. 270℃
B. 380℃
C. 420℃
D. 510℃
【单选题】
[87]关于冷泵预冷的目的，下列说法不正确的是___。
A. 检查泵润滑是否良好
B. 避免泵启动后发生变形
C. 使泵体各构件收缩均匀
D. 防止泵启动后密封变形而泄漏
【单选题】
[88]裂解气压缩机开车前，油泵允许启动的最低油温是___。
A. 21℃
B. 25℃
C. 30℃
D. 48℃
【单选题】
[89]润滑油三级过滤中，大桶到贮油槽所用的过滤期望规格为___。
A. 40目
B. 60目
C. 80目
D. 100目
【单选题】
[90]润滑油三级过滤的目的是___。
A. 防止润滑油在运输过程中带入杂质
B. 防止润滑油在管理过程中带入杂质
C. 防止润滑油在加注过程中带入杂质
D. 防止润滑油在润滑过程中带入杂质
【单选题】
[91]在裂解气分离中，分离温度最低，冷量消耗最大，乙烯损失最高的地方是___。
A. 乙烯精馏塔
B. 脱甲烷塔
C. 脱乙烷塔
D. 冷箱
【单选题】
[92]泵对单位重量液体所能提供的有效能量称泵的___。
【单选题】
[93]丙烯压缩机的透平动力驱动源为超高压蒸汽，抽气为___。
【单选题】
[94]丙烯机的转速由___来控制。
A. 一段入口压力
B. 二段入口压力
C. 三段入口压力
D. 四段出口压力
推荐试题
【填空题】
58.BIM 中的图形是赋予了___属性的实体。
【填空题】
59.BIM 是指建筑物在设计和建造过程中，创建和使用的“___”。
【单选题】
The word "wag" (Line 1, Para.1) most probably means _________.
A. move
B. shake
C. bite
D. play
【单选题】
The video cameras were used to catch the dogs' responses because ___________.
A. the dogs were put in the wooden boxes
and tested one at a time
B. it was easier to catch the dogs’s response changes in the tail wagging
C. they enabled the dogs’owners to know
about their dogs’; habit
D. the dogs wagged their tails in different
directions when they were in different
moods
【单选题】
When there are no stimuli, a dog will ___________.___
A. wag to the right
B. no wag at all
C. wag to the left
D. wag to the left and then wag to the right
【单选题】
The purpose of doing the experiment is _________.___
A. to train dogs for their owners
B. to help dogs find companion
C. to help people choose their pet dogs
D. to help people judge the mood of dogs
【单选题】
The underlined word "they" in the last sentence refers to __________.___
A. the trainers
B. the systems
C. the researchers
D. the dogs
【单选题】
The new law passed in Rome will ________.___
A. help improve fishing environment
B. stop people from catching goldfish
C. guarantee better conditions for goldfish
D. discourage keeping goldfish at home
【单选题】
People in Rome believe that the civilization of a city can be judged by _________.___
A. awareness of animal protection
B. exchanges with other cities
C. protection of ancient ruins
D. recognition of animal lovers
【单选题】
The underlined word "compassion" in Para 2 is the closest in meaning to __________.___
A. support
B. pity
C. help
D. love
【单选题】
People may break the law in Turin if they ________.___
A. keep their dogs or cats in cars
B. shut their dogs home all day long
C. raise their cats near ancient ruins
D. feed homeless animals in car parks
【单选题】
We can infer from the passage that _________.___
A. the owners can leave their dogs in hot cars
B. the cat only lives in modern life
C. the new law can prevent cruelty to animals
D. the new law gives recognition to the
people who feed homeless cat
【单选题】
If a person finds getting up early a problem, most probably ________.___
A. he is a lazy person
B. he refuses to follow his own energy cycle
C. he is not sure when his energy is low
D. he is at his peak in the afternoon or evening
【单选题】
Which of the following may lead to family quarrels according to the passage?___
A. Unawareness of energy cycles.
B. Familiar monologues.
C. A change in a family member's energy cycle.
D. Attempts to control the energy cycle of other family members.
【单选题】
If one wants to work efficiently at his low point in the morning, he should __________.___
A. change his energy cycle
B. overcome his laziness
C. get up earlier than usual
D. go to bed earlier
【单选题】
You are advised to rise with a yawn and stretch because it will __________.___
A. help to keep your energy for the day's work
B. help you to control your temper early in the day
C. enable you to concentrate on your routine work
D. keep your energy cycle under control all day
【单选题】
Which of the following statements is NOT true?___
A. Getting off to work with a minimum effort helps save one's energy.
B. Dr. Kletman explains why people reach their peaks at different hours of day.
C. Habit helps a person adapt to his own energy cycle.
D. Children have energy cycles, too.
【单选题】
An effective way to prevent the burnout of young athletes is __________.___
A. to increase their sense of success
B. to make sports less competitive
C. to reduce their mental stress
D. to make sports more challenging
【单选题】
According to the passage sport is positive for young people in that __________.___
A. it can help them learn more about society
B. it enables them to find flaws in themselves
C. it teaches them how to set realistic goals for themselves
D. it can provide them with valuable experiences
【单选题】
Many coaches and parents are in the habit of criticizing young athletes __________.___
A. without realizing criticism may destroy their self-confidence
B. in order to make them remember life's lessons
C. believing that criticism is beneficial for their early development
D. so as to put more pressure on them
【单选题】
According to the passage parents and coaches should __________.___
A. help children to win every game
B. pay more attention to letting children enjoy sports
C. train children to cope with stress
D. enable children to understand the positive aspect of sports
【单选题】
The author's purpose in writing the passage is _________.___
A. to persuade young children not to worry about criticism
B. to stress the importance of positive reinforcement to children
C. to discuss the skill of combining criticism with encouragement
D. to teach young athletes how to avoid burnout
【单选题】
As pointed out at the beginning of the passage, people used to think that air pollution _______.___
A. cause widespread damage in the countryside
B. affected the entire eastern half of the United States
C. had damaged effect on health
D. existed merely in urban and industries areas
【单选题】
As to the greenhouse effect, the author ________.___
A. share the same view with the scientist
B. is uncertain of its occurrence
C. rejects it as being ungrounded
D. thinks that it will destroy the world soon
【单选题】
The underlined word "offset" in the second paragraph could be replaced by _________.___
A. slip into
B. make up for
C. set up
D. catch up with
【单选题】
It can be concluded that ____________.___
A. raising the world's temperature only a few degrees would not do much harm to life on earth
B. lowering the world's temperature merely a few degrees would lead major farming areas to disaster
C. almost no temperature variations have occurred over the past decade
D. the world's temperature will remain constant in the years to come
【单选题】
This passage is primarily about __________.___
A. the greenhouse effect
B. the burning of fossil fuels
C. the potential effect of air pollution
D. the likelihood of a new ice age
【单选题】
What is the major function of paragraph 1?___
A. To arouse the reader's concern.
B. To introduce the theme of the whole passage.
C. To summarize the whole passage.
D. To state the primary uses of TV.
【单选题】
Television, as a source of entertainment, is ________.___
A. not very convenient
B. very expensive
C. quite dangerous
D. relatively cheap
【单选题】
Why are some people against TV?___
A. Because TV programs are not interesting.
B. Because TV viewers are totally passive.
C. Because TV prices are very high.
D. Because TV has both advantages and disadvantages.
【单选题】
One of the most obvious advantages of TV is that _________.___
A. it keeps us informed
B. it is very cheap
C. it enables us to have a rest
D. it controls our lives
【单选题】
According to the passage, whether TV is good or not depends on ___________.___
A. its quality
B. people's attitude towards it
C. how we use it
D. when we use it
【单选题】
What regulation was issued by New York State concerning beverage containers?___
A. A fee should be charged on used containers for recycling.
B. Throwaways should be collected by the state for recycling.
C. Consumers had to pay for beverage containers and could get their money back on returning them.
D. Beverage companies should be responsible for collecting and reusing discarded plastic soda bottles.
【单选题】
The returned plastic bottles in New York used to _____________.___
A. be turned into raw materials
B. be separated from other rubbish
C. have a second-life value
D. end up somewhere underground
【单选题】
The key problem in dealing with returned plastic beverage containers is ______________.___
A. how to reduce their recycling costs
B. to sell them at a profitable price
C. how to turn them into useful things
D. to lower the prices for used materials
【单选题】
Recycling has become the first choice for the disposal of rubbish because ______________.___
A. recycling causes little pollution
B. other methods are more expensive
C. recycling has great appeal for the jobless
D. local governments find it easy to manage
【单选题】
It can be concluded from the passage that ____________.___
A. recycling is to be recommended both economically and environmentally
B. local governments in the U.S. can expect big profits from recycling
C. rubbish is a potential remedy for the shortage of raw materials
D. landfills will still be widely used for waste disposal
【单选题】
The author chose to study engineering at a small liberal-arts university because he ________.___
A. intended to be a sensible student with noble ideals
B. wanted to be an example of practicality and rationality
C. intended to be a combination of engineer and humanist
D. wanted to coordinate engineering with liberal-arts courses in college
【单选题】
According to the author, by interacting with people who study liberal arts, engineering students can __________.___
A. broaden their horizons
B. receive guidance in their careers
C. become noble idealists
D. balance engineering and the liberal arts
【单选题】
In the eyes of the author, a successful engineering student is expected ______________.___
A. to be imaginative with a value system to guide him
B. to be a technical genius with a wide vision
C. to have an excellent academic record
D. to be wise and mature
