问题 问答题 简答题

变压器油温高如何检查处理?

答案

参考答案:

1.核对控制室显示温度和就地温度计有无异常。

2.检查变压器负荷和冷却介质温度,校对该负荷温度是否正常。

3.检查冷却装置是否正常,备用或辅助冷却器投入是否正常。室内变压器应启动通风机。

4.降低变压器负载,使其温度不超过允许值;如变压器油温或绕阻温度仍有上升趋势,应立即申请停止变压器运行。

5.在正常负载和冷却条件下,变压器温度不正常并不断上升,且经检查证明温度指示正确和油样分析正常,则认为变压器已发生内部故障,应立即将变压器停运。有备用电源者之前应将负荷倒至备用电源运行。

阅读理解

    

D

Although women lead healthier, longer lives, the cruel perception that they reach their sell-by date and become “old” sooner than men is widespread in the workplace, research shows.

A survey of more than 2,600 managers and personnel professionals showed that age discrimination is not only common in the workplace, but is full of inconsistencies(矛盾). Six in ten managers thought that they had suffered from age discrimination——usually because they were turned down for a job for being too old or too young. Yet more than a fifth admitted that they used age as a condition when they employ new workers.

Although the survey found widespread agreement that older workers were better than younger colleagues when it came to reliability, commitment, loyalty and customer service, these qualities were not necessarily considered to be worthy of advancement. More than half of respondents believed that workers between 30 and 39 were the most likely to be advanced in their company, with only 2 per cent citing (引证)50-year-olds or above.

Dianah Worman of the Chartered Institute of Personnel and Development said that there was anecdotal evidence that people were considered old at different ages in different sectors. “We heard of one man working in IT who said he was considered too old by the age of 28,”she said.“There was no evidence to suggest that older workers were less valuable to companies than younger workers, in fact the opposite was often true because older workers often brought experience.” she added.

The findings also suggested that the Government’s ideas on age in the workforce may also be out of step with reality.

68. The text is mainly about ______.

A. the government’s idea on age in workforce 

B. age discrimination in the workforce

C. the people who find work            

D. the discussion about who is worth promoting

69. The underlined word “sell-by date” in paragraph 1 probably refers to______.

A. the age when they retire   

B. the age when they should be promoted

C. the date on which they’re sold 

D. the date when they sell goods

70. The writer’s purpose in writing the text is to ______.

A. tell the government to employ older workers 

B. criticize managers who treat workers unfairly

C. report the findings of a survey    

D. show he objects to age discrimination

不定项选择