问题 问答题 简答题

DEH系统的主要功能有哪些?

答案

参考答案:

DEH的主要功能有如下各项:

⑴、控制功能

①运行方式控制功能。

②阀门管理(VM)功能。

③主蒸汽压力控制(TPC.功能。

④超速保护控制(OPC.功能等。

⑵、监视、保护功能

①监视与报警功能。

②危急遮断保护功能。

⑶、通信功能

DEH系统可以通过接口,与外界各种相关的控制系统相连接,实现不同的控制方式。

⑷试验功能

在运行过程中,可以通过DEH控制系统对阀门进行在线试验,也可以进行OPC试验等。

阅读理解

Federal Child Labor Standards for Teenagers

Teenage labor in the United States

Federal Law sets child labor standards affecting teenage workers in the private companies and in federal, state, and local governments.

How can injuries be prevented?

Demand Training

Insist on adequate supervision(监督)and easy access to a supervisor at all times.

Demand sufficient training on equipment and chemicals you are required to use.Refuse to use unknown materials or machinery that is broken or improperly set up.

Wear protective equipment

Always use whatever protective equipment is supplied.Protective clothing includes non-slip shoes, gloves and other specific job-related protective gear.

Request reasonable protective equipment if it is not provided automatically.

Know your environment

Ask about workplace hazards and precautions(预防措施)that can help prevent injuries.

Workplace hazards are objects and situations present at your job that could potentially hurt you.Recognize safety hazards such as slippery floors, unsafe ladders, sharp knives, and heavy lifting.

Know the law

Learn about federal and state laws governing employment for teenagers and make you’re your supervisor enforces them.

How many working hours are allowed?

Teenagers (ages 14-15) may total no more than

■3 hours on a school day.

■18 hours in a school week.(A school week is any week in which school attendance is required for any part of four or more days.)

■8 hours on a non-school day.

■40 hours m a non-school week.

What are the responsibilities?

Employers and employees share the responsibility for keeping the workplace safe and healthy.As a teenage worker, you can do your part by taking these steps:

■Follow rules.

■Use safety equipment.

■Keep your work area clean.

■Report all injuries.

■Inform a supervisor if you feel sick.

■Report safety problems.

小题1:If a teenager is asked to work with equipment out of order, he or she should       _.

A.demand enough training

B.refuse to work with the equipment

C.ignore the instructions on the machine

D.ask for necessary protective tools小题2:All of these are examples of workplace hazards EXCEPT        .

A.sharp knives

B.heavy lifting

C.slippery floors

D.steady ladders小题3:According to the passage, which of the following should a teenage worker do in the workplace?

A.Depend on his own in any case.

B.Deal with his injuries himself.

C.Contact a supervisor when feeling uncomfortable.

D.Use any tool in hand.

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