海船船员考试

单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）A cool the furnace to prevent pre-ignitionB remove explosive vapors from the furnaceC evaporate accumulated unburned fuel oilD provide sufficient air in the fur

题目
单选题
The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）
A

cool the furnace to prevent pre-ignition

B

remove explosive vapors from the furnace

C

evaporate accumulated unburned fuel oil

D

provide sufficient air in the furnace to allow ignition of the fuel

如果没有搜索结果，请直接 联系老师 获取答案。
如果没有搜索结果，请直接 联系老师 获取答案。
相似问题和答案

第1题：

Which two statements are true about a Work Item with "Open" Notification? ()(Choose two.)

A. The Work Item is not eligible for Purge.

B. The Work Item is eligible for a Permanent purge.

C. The Work Item is eligible for a Temporary purge.

D. The Work Item is not complete because it still has "Open" Notification.

E. The Work Item is eligible for both Temporary and Permanent purge.


参考答案：A, D

第2题：

Documentation of a software package is normally produced for two purposes.The other purpose of documentation is to describe the software's internal composition so that the system can be maintained later in its life cycle. Documentation of this type is known as （ ） .

A.system documentation
B.user documentation
C.vender documentation
D.license documentation

答案：A
解析：
另一种目的下的文档是描述软件的内部组成，以便于系统能够在其生命周期的后续阶段得到维护，这种类型的文档被称为系统文档。

第3题：

炉内清扫purge(名词解释)


参考答案：点火之前，将炉膛和烟道彻底通风，排除炉膛及烟道内所积存的可燃性气体，以免点火时发生气体爆炸的过程。清扫工作可用引风机通风，也可用引风机和鼓风机同时通风。

第4题：

You want to purge job entries older than 5 days from the job log. You do not want to purge window log entries. Which command will you use to accomplish this task？（）  

  • A、 EXECUTE DBMS_SCHEDULER.PURGE_LOG（log_history => 5， job_name => ’JOB1’）；
  • B、 EXECUTE DBMS_SCHEDULER.PURGE_LOG（ log_history => 5， job_name => ’JOB_LOG’）；
  • C、 EXECUTE DBMS_SCHEDULER.PURGE_LOG（ log_history => 5， which_log => ’JOB1’）；
  • D、 EXECUTE DBMS_SCHEDULER.PURGE_LOG（ log_history => 5， which_log =>’JOB_LOG’）；

正确答案:D

第5题：

Purge System Fault翻译为：净化系统故障。


正确答案:正确

第6题：

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the

A.cylinder compression pressure may not be high enough

B.cylinder compression temperature may be too high

C.fuel oil injection pressure may not be high enough

D.scavenge and purge process is incomplete


正确答案：A

第7题：

purge air翻译为：净化空气


正确答案:正确

第8题：

Youwanttopurgejobentriesolderthan5daysfromthejoblog.Youdonotwanttopurgewindowlogentries.Whichcommandwillyouusetoaccomplishthistask?()

A.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，job_name=>’JOB1’）；

B.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，job_name=>’JOB_LOG’）；

C.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，which_log=>’JOB1’）；

D.EXECUTEDBMS_SCHEDULER.PURGE_LOG（log_history=>5，which_log=>’JOB_LOG’）；


参考答案：D

第9题：

CYCLE81，CYCLE82，CYCLE83指令均为钻孔循环指令（SIEMENS系统）。


正确答案:正确

第10题：

One hertz is equal to one ( )

  • A、cycle per centimeter
  • B、cycle per meter
  • C、cycle per second
  • D、cycle per eV

正确答案:C

更多相关问题
相关内容