问题 问答题 简答题

简述门的闭合-检验内容与要求。

答案

参考答案:

(1)正常运行时应当不能打开层门和轿门,除非轿厢在该层门的开锁区域内停止或停站;如果一个层门或者轿门(或者多扇门中的任何一扇门)开着,在正常操作情况下,应当不能启动电梯或者不能保持继续运行;

(2)每个层门和轿门的闭合都应当由一个电气安全装置来验证,如果滑动门是由数个间接机械连接的门扇组成,则未被锁住的门扇上也应当设置电气安全装置以验证其闭合状态

检验方法:

(1)使电梯以检修速度运行,打开层门,检查电梯是否停止;

(2)将电梯置于检修状态,层门关闭,打开轿门,观察电梯能否运行;

(3)对于由数个间接机械连接的门扇组成的滑动门,抽取轿门和基站、端站以及20%其他层站的层门,短接被锁住门扇上的电气安全装置,使各门扇均打开,观察电梯能否运行

阅读理解

阅读理解。

      More and more people like bicycling and it is no surprise. It is fun, healthy and good for the environment.

Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today. Bikes

can take you almost anywhere, and there is no oil cost!

     Get on a bicycle and ride around your neighbourhood. You may discover something new all around you.

Stopping and getting off a bike is easier than stopping and getting out of your car. You can bike to work

and benefit (受益) from the enjoyable exercise without polluting the environment. You don't even have to

ride all the way.

      Folding (折叠) bikes work well for people who ride the train. Just fold the bike and take it with you.

You can do the same on an airplane. A folding bike can be packed in a suitcase. You can also take a

common bike with you when you fly. But be sure to look for information by getting on airline websites.

Not all airlines are bicycle-friendly to travellers. Health Benefits of Bicycling: 

      It helps to prevent heart diseases.

      Bicycling helps to control your weight.

      A 15-minute bike ride to and from work three times a week burns off five kilos of fat in a year.

      Bicycling can improve your mood (心情).

      Exercise like bicycling has been shown to make people feel better, more relaxed and self-confident. 

      Bicycling is healthier than driving.

1. From the passage, we know that bicycling is becoming very _____.[ ]

A. surprising

B. exciting

C. expensive

D. popular

2. When you are riding your bicycle around your neighbourhood, you may _____. [ ]

A. pollute the environment around

B. find something you didn't notice

C. go everywhere and use a little oil

D. get off your bike and begin to work

3. If you travel with a folding bike, you can fold it and _____. [ ]

A. get out of the car

B. take it onto a train

C. put it in your purse

D. go on airline websites

4. One of the benefits from bicycling is that _____.  [ ]

A. you can fold the bicycle

B. you will be friendly to others

C. you will be more relaxed

D. you may get fatter and fatter

5. Which is TRUE according to the passage? [ ]

A. Bicycling is enjoyable exercise for people.

B. Driving cars is healthier than riding bikes.

C. Riding a bike pollutes your neighbourhood.

D. Common bikes are welcomed by all airlines.

单项选择题