问题 问答题 简答题

简要说明二氧化碳汽提塔人孔盖密封垫的组装应注意哪些问题?

答案

参考答案:

1.组装前,密封面、不锈钢齿形垫必须清洗干净,不得有脏污落在密封面上。

2.人孔盖吊装时,要平稳、缓慢,防止下落时产生卡塞及刮伤现象;人孔盖就位后,其密封面和塔体法兰上的密封面以及组合垫在液压紧卸装置加油压前应基本均匀紧贴。

3.人孔盖上螺栓孔周围外表面的主要螺母平面应平整无毛刺,否则会影响组合密封垫的均匀受力。

4.为拆卸顺利,在主螺栓的螺纹上应刷二硫化钼。

5.按顺序分五次拧紧螺栓,每个压力等级需按顺序紧二次,以保证受力均匀。在拧紧过程中,可用塞规测量人孔盖和法兰面之间的间隙,间隙偏差应在0.3MM以内。

6.为保证密封可靠,在螺栓上紧24小时后或升温钝化后在预紧一次。

7.拆卸人孔盖时,也应按同样顺序松开螺母,但第一次的油压可稍高于上紧时的终压。

8.上述检修完成后,密封试漏工作随塔体水压试验及气密性试验进行,试验压力按设计要求确定。

阅读理解

阅读理解。

     Next time a customer comes to your office, offer him a cup of coffee. And when you're doing your

holiday shopping online, make sure you're holding a large glass of iced tea. The physical sensation (感觉)

of warmth encourages emotional warmth, while a cold drink in hand prevents you from making unwise

decisions-those are the practical lesson being drawn from recent research by psychologist John A. Bargh.

     Psychologists have known that one person's perception (感知) of another's "warmth" is a powerful

determiner in social relationships. Judging someone to be either "warm" or "cold" is a primary consideration,

even trumping evidence that a "cold" person may be more capable. Much of this is rooted in very early

childhood experiences, Bargh argues, when babies' conceptual sense of the world around them is shaped

by physical sensations, particularly warmth and coldness. Classic studies by Harry Harlow, published in

1958, showed monkeys preferred to stay close to a cloth "mother" rather than one made of wire, even

when the wire "mother" carried a food bottle. Harlow's work and later studies have led psychologists to

stress the need for warm physical contact from caregivers to help young children grow into healthy adults

with normal social skills.

     Feelings of "warmth" and "coldness" in social judgments appear to be universal. Although no worldwide

study has been done, Bargh says that describing people as "warm" or "cold" is common to many cultures,

and studies have found those perceptions influence judgment in dozens of countries.

     To test the relationship between physical and psychological warmth, Bargh conducted an experiment

which involved 41 college students. A research assistant who was unaware of the study's hypotheses (假

设), handed the students either a hot cup of coffee, or a cold drink, to hold while the researcher filled out

a short information form: The drink was then handed back. After that, the students were asked to rate the

personality of "Person A" based on a particular description. Those who had briefly held the warm drink

regarded Person A as warmer than those who had held the iced drink. "We are grounded in our physical

experiences even when we think abstractly," says Bargh.

1. According to Paragraph 1, a person’s emotion may be affected by _____.

A. the visitors to his office

B. the psychology lessons he has

C. his physical feeling of coldness

D. the things he has bought online

2. The author mentions Harlow’s experiment to show that _____.

A. adults should develop social skills

B. babies need warm physical contact

C. caregivers should be healthy adults

D. monkeys have social relationships

3. In Bargh’s experiment, the students were asked to _____.

A. evaluate someone’s personality

B. write down their hypotheses

C. fill out a personal information form

D. hold coffee and cold drink alternatively

4. We can infer from the passage that _____.

A. abstract thinking does not come from physical experiences

B. feelings of warmth and coldness are studied worldwide

C. physical temperature affects how we see others

D. capable persons are often cold to others

5.What would be the best title for the passage?

A. Drinking for Better Social Relationships.

B. Experiments of Personality Evaluation.

C. Developing Better Drinking Habits.

D. Physical Sensations and Emotions.

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