2022锅炉工题库考前点睛模拟考试165

1. [单选题]炉膛出口压力常用（）表示

A. 绝对压力
B. 表压力
C. 负压
D. 大气压力

2. [单选题]顺流式固定床离子交换器^(exchanger)的操作从交换器^(exchanger)失效后算起，通常为（）

A. A、再生-正洗-反洗-交换
B. B、再生-反洗-正洗-交换
C. C、反洗-再生-正洗-交换
D. D、反洗-正洗-再生交换

3. [单选题]You issued the following commands to configure setting in RMAN;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）

A. The backup will terminate because the FORMAT clause was not configured for the channel
B. It backs up two copies of data files to tape and disk, and two copies of archived log file on tape
C. It backs up the data files and archived log files to disk, making two copies of each data file and archived log file
D. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

4. [单选题]随着初参数提高，经济性也随之提高的机组为（）。

A. A

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