问题
问答题 简答题
气体继电器如何安装?
答案
参考答案:(1)检验气体继电器是否合格。
(2)应水平安装,顶盖上标示的箭头指向储油柜。
(3)允许继电器的管路轴线往储油柜方向的一端稍高,但与水平面倾斜不应超过4%。
(4)各法兰的密封垫需安装妥当。
(5)不得遮挡油管路通径。
气体继电器如何安装?
参考答案:(1)检验气体继电器是否合格。
(2)应水平安装,顶盖上标示的箭头指向储油柜。
(3)允许继电器的管路轴线往储油柜方向的一端稍高,但与水平面倾斜不应超过4%。
(4)各法兰的密封垫需安装妥当。
(5)不得遮挡油管路通径。
完形填空 | ||||
Manners are important to happy relations among people. No one 1 a person with bad manners. A 2 with good manners never laughs at people when they are in trouble. Instead, he 3 to help them. When he asks for something, he says " 4 ". And when he receives something, he 5 says "Thank you". He does not interrupt (打扰) 6 people when they are talking, He does not talk loudly or laugh loudly 7 public. When he sneezes or spits(吐痰) , he uses a 8 . If he is late, he 9 make an apology to the teacher either at the time 10 after class. | ||||
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某同学为了测定实验室中氯酸钾样品的纯度,取2.5g该样品与0.5g二氧化锰混合.加热该混合物t1时间后(假设杂质不参加反应),冷却,称量剩余固体质量,重复以上操作,依次称得加热t2、t3、t4时间后剩余固体的质量,记录数据如下表:
加热时间 | t1 | t2 | t3 | t4 |
剩余固体质量(g) | 2.12 | 2.08 | 2.04 | 2.04 |
(2)加热t3时间后氯酸钾是否已经完全反应?______ (填是或否).
(3)求完全反应后产生氧气的质量.
(4)求该样品中氯酸钾的纯度.