相关试题
【单选题】
[23]裂解气压缩机联锁不包括的是___。
A. 排出温度
B. 手动
C. 液位
D. 真空度低
【单选题】
[24]在测量稳定压力时，选用的压力表量程一般为测量值的___倍
A. 1.0倍
B. 0.5倍
C. 1.5倍
D. 2.0倍
【单选题】
[25]在测量波动压力时，选用的压力表量程一般为测量值的___倍。
A. 1.0倍
B. 0.5倍
C. 1.5倍
D. 2.0倍
【单选题】
[26]对于烃类混合气体，其生成烃水合物温度、压力随___变化
A. 气体密度
B. 装置负荷
C. 水含量大小
D. 气体比例
【单选题】
[27]塔的操作压力对相对挥发度影响很大，若塔压增加，则相对挥发度___。
A. 增加
B. 减少
C. 不变
D. 无法确定
【单选题】
[28]冻塔与液泛的主要区别___
A. 冻塔时塔压差增大，液泛时压差不变。
B. 冻塔与液泛时塔压差都增大，但冻塔时塔内温度不变。
C. 冻塔与液泛时塔压差都增大，但冻塔时加大塔顶采出减少回流量和降低釜温等.措施后，压差仍不降低。
D. 液泛影响产品质量，冻塔不会。
【单选题】
[29]油过滤器压差达___MPa时，要切换。
A. 0.15
B. 0.12
C. 0.14
D. 0.16
【单选题】
[30]在物料、热量、气液平衡的精流塔中，塔顶采出量的大小和该塔___的大小有着对应的关系。
A. 塔釜加热量
B. 进料量
C. 回流量
D. 塔顶冷剂量
【单选题】
[31]低温泵预冷的温度变化一般以___为宜
A. 30℃/h
B. 40℃/h
C. 50℃/h
D. 60℃/h
【单选题】
[32]裂解气脱除酸性气的目的是___
A. 防止管线冻堵
B. 避免催化剂中毒
C. 保证产品合格
D. 以上都是
【单选题】
[33]如何判断碱洗塔聚合物堵塞___。
【单选题】
[34]乙烯制冷系统中干燥时对露点的要求是低于___。
A. -30℃
B. -60℃
C. -50℃
D. -40℃
【单选题】
[35]乙烯纯度要求是___
A. 0.9955
B. 0.9965
C. 0.9998
D. 0.9995
【单选题】
[36]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】
[37]碱洗塔设水洗段的目的___
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】
[38]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】
[39]裂解气压缩机透平暖机方式为___。
A. 半弧暖机
B. 全弧暖机
C. 背压暖机
D. 抽汽暖机
【单选题】
[40]压缩机轴瓦回油温度高原因___。
A. 上油温度低
B. 冷却水温度高
C. 轴瓦已磨损
D. B、C二者
【单选题】
[41]透平打闸时，其203继电器应处于___。
A. 通电状态
B. 断电状态
C. 没有反应
D. 指示灯处于灭状态 .
【单选题】
[42]密封油玻璃板指示与调节器存在偏差原因___。
A. 玻璃板角阀关死
B. 调节器带油
C. 气压不稳
D. A、B两者
【单选题】
[43]透平打闸后，压缩机盘车多长时间___。
A. 不用盘车
B. 6小时
C. 12小时
D. 24小时以上
【单选题】
[44]影响泡点的因素有___
A. 操作压强
B. 液体的组成
C. 操作压强和液体的组成
D. 操作温度
【单选题】
[45]往复泵往复次数增加时，流量增加，扬程___
A. 增加
B. B减小
C. 不变
D. 先增加后减小
【单选题】
[46]裂解气干燥器床层干燥剂约___用于吸收水分，余下部分为保护区床层吸收
A. 0.7
B. 0.8
C. 0.9
D. 0.95
【单选题】
[47]3A分子筛的吸附容量随着___变化而变化
A. 压力
B. 温度
C. 被吸附分子大小
D. 时间
【单选题】
[48]压缩机转子轴位移变大的原因主要有___
A. 出口温度高
B. 出口憋压
C. 负荷过大
D. B、C两者
【单选题】
[49]停用换热器的原则是___
A. 先关冷流后关热流
B. 先关热流后关冷流
C. 冷热物流同步关
D. 没有顺序
【单选题】
[50]对于压缩三大机组，为了防止___起动油路系统时，机体内必须充压。
A. 机油串入机壳
B. 系统抽真空
C. 压缩机喘振
D. 防止油路压力低
【单选题】
[51]P-403A/B气相预冷需要多少时间___。
A. 0.5h
B. 1h
C. 1.5h
D. 2h
【单选题】
[52]下列那些物质会造成碳二加氢催化剂临时中毒___
A. H2S、CO、CO2
B. H3AS
C. 炔烃
D. CH3OH
【单选题】
[53]气相干燥器D-209运行周期为___。
A. 24小时
B. 48小时
C. 30小时
D. 45小时
【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
推荐试题
【单选题】
Of the following books, is NOT written by Ernest Hemingway.
A. A. The Sun Also Rises
B. B. The Sound and the Fury
C. C. A Farewell to Arms
D. D. For Whom the Bell Tolls
【单选题】
F. Scott Fitzgerald’s finest novel is , and its theme is about
A. A. The Great Gatsby, the American Dream
B. B. Tender is the Night, love
C. C. Tales of the Jazz Age, the loss of oneself
D. D. The Beautiful and the Damned, the evil of human nature
【单选题】
Of the following writers, is NOT included in the group of naturalists.
A. A. Stephen Crane
B. B. Frank Norris
C. C. Theodore Dreiser
D. D. Herman Melville
【单选题】
Of the following, is NOT characteristic of Mark Twain’s works.
A. A. colloquial speech
B. B. a sense of humor
C. C. a realistic view
D. D. an idealistic view
【单选题】
Of the following, is considered Herman Melville’s masterpiece.
A. A. The Last of the Mohicans
B. B. The Legend of Sleepy Hollow
C. C. Moby Dick
D. D. Daisy Miller
【单选题】
Of the following, is NOT Nathaniel Hawthorne’s work.
A. A. The Scarlet Letter
B. B. The House of the Seven Gables
C. C. The Marble Faun
D. D. Nature
【单选题】
is regarded as “the father of American literature”.
A. A. James Fennimore Cooper
B. B. Ralph Waldo
C. C. Thomas Jefferson
D. D. Washington Irving
【单选题】
Of the following writers, are from the Colonial and Revolutionary Periods.
A. A. Benjamin Franklin & Edgar Ellen Poe
B. B. Edgar Ellen Poe & Jonathan Edwards
C. C. Benjamin Franklin & Jonathan Edwards
D. D. Edgar Ellen Poe & Washington Irving
【单选题】
The National Day of the United States falls on .
A. A. June 4th
B. B. July 4th
C. C. June 14th
D. D. July 14th
【单选题】
Of the following, is NOT among the three major radio and TV networks in America.
A. A. the National Broadcasting System (NBS)
B. B. the Public Broadcasting Service (PBS)
C. C. the Columbia Broadcasting System (CBS)
D. D. the American Broadcasting System (ABS)
【单选题】
is sold especially to the upper or upper-middle class and it has a reputation for its serious attitude and great bulk.
A. A. The Washington Post
B. B. The New York Times
C. C. Los Angeles Times
D. D. New York Daily News
【单选题】
Of the following universities, has NOT cultivated any American President yet.
A. A. Harvard University
B. B. Massachusetts Institute of Technology
C. C. Princeton University
D. D. Yale University
【单选题】
To get a bachelor’s degree, all undergraduate students are required to do the following except .
A. A. attending lectures and completing assignments
B. B. passing examinations
C. C. working for communities
D. D. earning a certain number of credits
【单选题】
Of the following, is NOT the responsibility of the board of trustees in U. S. institutions.
A. A. choosing the president
B. B. establishing policies for administrators and faculty
C. C. approving budget and other financial project
D. D. decide which student to enroll
【单选题】
Of the following, are NOT among the categories of American higher education.
A. A. universities and colleges
B. B. research institutions
C. C. technical institutions
D. D. community colleges
【单选题】
Higher education in the United States began with the founding of
A. A. Yale University
B. B. Harvard University
C. C. Princeton University
D. D. New York University
【单选题】
Of the following subjects, are NOT offered to elementary school students.
A. A. mathematics and languages
B. B. politics and business education
C. C. science and social studies
D. D. music and physical education
【单选题】
Formal education in the United States consists of , secondary and higher education.
A. A. kindergarten
B. B. public
C. C. elementary
D. D. private
【单选题】
At present, U. S. exports account for of the world’s total.
A. A. 10%
B. B. 15%
C. C. 20%
D. D. 25%
【单选题】
is not one of the three giants in American automobile industry.
A. A. Ford
B. B. General Motors
C. C. Chrysler
D. D. American Motors
【单选题】
The following statements are all true except .
A. A. Agribusinesses reflect the big, corporate nature of many farm enterprises.
B. B. Agribusinesses maintain a balanced trade pattern between agricultural imports and exports.
C. C. Agribusinesses range from one-family corporations to multinational firms.
D. D. Agribusinesses include a variety of farm businesses and structures.
【单选题】
About of American crops are for export.
A. A. half
B. B. one third
C. C. one fourth
D. D. one fifth
【单选题】
President Johnson tried to build a “Great Society” by introducing various programs like the following except .
A. A. Medicare
B. B. Food Stamps
C. C. Education Initiatives
D. D. Unemployment Pension
【单选题】
The following inventions took place during the “second indThe following inventions took place during the “second industrial revolution” except .
A. A. typewriter
B. B. telephone
C. C. electric light
D. D. refrigerator
【单选题】
The first National Bank of the United States was established with the urge of .
A. A. George Washington
B. B. Thomas Jefferson
C. C. Andrew Jackson
D. D. Alexander Hamilton
【单选题】
Chartered companies were NOT granted the by the British King or Queen.
A. A. political authority
B. B. economic rights
C. C. judicial authority
D. D. diplomatic authority
【单选题】
The modern American economy progressed from to , and eventually, to .
A. A. colonial economy, handcraft economy, industrial economy
B. B. farming economy, handcraft economy, industrial economy
C. C. colonial economy, farming economy, industrial economy
D. D. handcraft economy, farming economy, industrial economy
【单选题】
America produces a major portion of the world’s products in the following fields except .
A. A. machinery
B. B. automobiles
C. C. ore
D. D. chemicals
【单选题】
The President is directly voted into office by .
A. A. all citizens of America
B. B. the citizens over 18 years old
C. C. electors elected by the voters
D. D. the senators and representatives
【单选题】
The Supreme Court is composed of justices.
A. A. six
B. B. seven
C. C. eight
D. D. nine
【单选题】
The terms for a Senator and Representative are and years respectively.
A. A. two, four
B. B. two, three
C. C. two, six
D. D. six, two
【单选题】
According to the Constitution, a candidate for President must be .
A. A. at least 35 years old
B. B. at least a 14 years’ resident of the United States
C. C. born in America
D. D. all of the above
【单选题】
The following except are all powers of the President.
A. A. vetoing any bills passed by Congress
B. B. appointing federal judges when vacancies occur
C. C. making laws
D. D. issuing executive orders
【单选题】
All the following except cannot make legislative proposal.
A. A. the Senator
B. B. the Representative
C. C. the Secretary of State
D. D. the President
【单选题】
The following except are guaranteed in the Bill of Rights.
A. A. freedom of religion
B. B. the right to get into people’s house by police
C. C. freedom of speech and of press
D. D. the right to own one’s weapon if one wishes
【单选题】
The Bill of Rights .
A. A. defines the rights of Congress and the rights of the President
B. B. guarantees citizens of the United States specific individual rights and freedoms
C. C. is part of the Declaration of Independence
D. D. has no relationship with the Constitution
【单选题】
The Constitution of the United States .
A. A. gives the most power to Congress
B. B. gives the most power to the President
C. C. tries to give each branch enough power to balance the others
D. D. gives the most power to the Supreme Court
【单选题】
The U. S. Constitution came into effect in .
A. A. 1787
B. B. 1789
C. C. 1791
D. D. 1793
【单选题】
The Vietnam War was a long-time suffering for Americans, and it continued throughout the terms of Presidents .
A. A. Johnson, Nixon and Ford
B. B. Truman, Eisenhower and Kennedy
C. C. Kennedy, Johnson and Nixon
D. D. Eisenhower, Kennedy and Johnson
【单选题】
President applied New Deal to deal with the problems of the Great Depression.
A. A. Wilson
B. B. Truman
C. C. Roosevelt
D. D. Kennedy
