问题 问答题 简答题

怎样对过热器、再热器管进行蠕胀检查与测量?更换标准是什么?

答案

参考答案:

在检修时,应先对管排进行宏观检查,观察管子的颜色、胀粗、鼓包情况,对于发现异常的部位应重点检查。对高温过热器、再热器的监视管段,由专人进行测量并登记在专用的表格上。

对过热器、再热器一般用的游标卡尺或自制的样板测量蠕胀。

合金钢管胀粗不能大于原有直径的2.5%,碳钢管胀粗不能大于原有直径的3.5%,对超过上述质量标准的,应更换新管。

阅读理解

阅读理解。

     Fast food chains (连锁), American-style, are now on the increase all over the world. Most of these places

work on a similar principle. There is a long counter (柜台), above which hangs a list (often with pictures) of

the items they sell, and behind which several people (often students working for the lowest wage) are working. Buyers form queues in front of each assistant. You receive what you order and take it on a tray to a table. If

you can't see any knives and forks, this means you are supposed to eat with your hands. If you can't see any

straws (吸管), that's because they are hiding in the straw machine that you have to push the bottom to get a

straw. When you've finished, you yourself throw away everything except the tray.

     Many fast-food places have drive-in facilities (设施). You place your order from your car through a

microphone and then drive round to a special window to pay and pick it up. You may even find places where

a waitress bring your meal out, and you sit and eat it in the car from a tray hooked over the door through the

open window.

1. What is the wage about the waiters or waitress working in the fast food shops?

A. We don't know.

B. Very high.

C. Very low.

D. Normal.

2. When you go to these fast food shops, how can you eat?

A. Using knives and forks.

B. The waiter will give you the menu.

C. You will have to carry the food on the tray to the table.

D. Sitting at the table and waiting for the food.

3. According to the passage, these fast food shops are usually quite ______.

A. similar

B. different

C. very popular

D. not expensive

4. What is a tray?

A. Something you can eat.

B. Something you can drink.

C. Something you throw away.

D. Something used for carrying things.

5. If you are driving your car, how can you have your fast food?

A. Stopping the car and going to the restaurant.

B. Having it at home.

C. Having it in the office.

D. Having it at fast-food places with drive-in facilities.

单项选择题 A2型题