问题 问答题 论述题

主机组在启动、运行中遇有哪些情况可以紧急停机?

答案

参考答案:

主机组在启动、运行中,遇有下列情况之一者,应立即紧急停机:

1主机及电气设备发生火灾或严重设备事故、人身事故;

2主机运转声音异常、发热;

3主机泵突然发生强烈震动;

4主机轴瓦温度和定子、转子温度急剧上升并超过规定值;

5主泵内有清脆的金属撞击声;

6直流系统故障,一时无法恢复;

7辅机系统有故障,危及安全运行;

8上、下游河道发生人身事故或险情;

9主电机供电系统突然停电

单项选择题
单项选择题

Now which are the animals really to be pitied in captivity First, those clever beings whose lively urge for activity can find no outlet behind the bars of the cage. This is most conspicuous, even for the uninitiated, in the case of animals which, when living in a free state, are accustomed to roaming about widely. Owing to this frustrated desire, foxes and wolves housed, in many old-fashioned zoos, in cages which are far too small, are among the most pitiable of all caged animals.
Though pinioned swans generally seem happy, under proper care, by hatching and rearing their young without any trouble, at migration time things become different: they repeatedly swim to the lee side of the pond, in order to have the whole extent of its surface at their disposal, trying to take off. Again and again the grand preparations end in a pathetic flutter of their half wings ; a truly sorry picture !
This, however, rarely awakens the pity of the zoo visitor, least of all when such an originally highly intelligent and mentally alert animal has deteriorated, in confinement, into a crazy idiot, a very caricature of its former self. Sentimental old ladies, the fanatical sponsors of the societies for Prevention of Cruelty to Animals, have no compunction in keeping a grey parrot in a relatively small cage or even chained to a perch. Together with the large corvines, the parrots are probably the only birds which suffer from that state of mind, common to prisoners, namely, boredom.

What does "the uninitiated" mean

A.People who visit animals in urban zoos.

B.People who do not like animals of the wild.

C.People who know little about a certain topic.

D.People who do not visit zoos every year.