单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）Acool the furnace to prevent pre-ignitionBremove explosive vapors from the furnaceCevaporate accumulated unburned fuel oilDprovide sufficient air in the furnace to allow ignition of the fuel
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
参考解析
解析：
暂无解析
相关考题：
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’）；
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.
If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because theA.cylinder compression pressure may not be high enoughB.cylinder compression temperature may be too highC.fuel oil injection pressure may not be high enoughD.scavenge and purge process is incomplete
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
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’）；
One hertz is equal to one ( )A、cycle per centimeterB、cycle per meterC、cycle per secondD、cycle per eV
关于CYCLE93指令，（）（SIEMENS系统）。A、CYCLE93是切槽循环指令B、使用CYCLE93指令可以简化编程C、CYCLE93指令可实现断屑加工D、CYCLE93指令可用于切削圆锥面和圆弧面E、CYCLE93可用于径向沟槽的切削加工
What is the difference between thE.remove and thE.purge action with the dpkg command？（）A、 -remove removes the program， -purge also removes the config filesB、 -remove only removes the program， -purge only removes the config filesC、 -remove removes a package， -purge also removes all packages dependent on itD、 -remove removes only the package file itself， -purge removes all files related to the package
You issued the following command： SQL DROP TABLE MYTABLE； SQL SHOW RECYCLEBIN The following output is returned： ORIGINAL NAME RECYCLEBIN NAME OBJECT TYPE DROP TIME ------------- ------------------------------ --------------- -------------------- MYTABLE BIN$04LhcpndanfgMAAAAAANPw==$0 TABLE 2005-01-13：20：11：31 You want to drop the table， MYTABLE， from the Recycle Bin. Which two commands can you issue to accomplish the desired task？（）A、 DROP TABLE MYTABLE PURGE；B、 PURGE RECYCLEBIN；C、 PURGE TABLE MYTABLE；D、 PURGE TABLE BIN$04LhcpndanfgMAAAAAANPw==$0；
单选题What is the difference between thE.remove and thE.purge action with the dpkg command？（）A -remove removes the program， -purge also removes the config filesB -remove only removes the program， -purge only removes the config filesC -remove removes a package， -purge also removes all packages dependent on itD -remove removes only the package file itself， -purge removes all files related to the package
单选题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’）；
单选题The size of the exhaust valve opening is （）Amost critical in a four-stroke cycle diesel engineBmost critical in a two-stroke/cycle diesel engineCmost critical in a four-stroke/cycle diesel engine if it is turbochargedDof equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine
单选题The purpose of the purge valve at the top of the condenser in a refrigerating system is to（）Aremove any air that may accumulate in the systemBtake out unpleasant fumes from the refrigerantCvent off excess refrigerant in an emergencyDpermit opening the refrigerating system for cleaning and inspecting
单选题The purpose of the programmed purge cycle on an automatically fired auxiliary boiler is to（）Acool the furnace to prevent pre-ignitionBremove explosive vapors from the furnaceCevaporate accumulated unburned fuel oilDprovide sufficient air in the furnace to allow ignition of the fuel
单选题Which of the following statements is true regarding the installation of piston rings on two-stroke/cycle, diesel engines as compared to four-stroke/cycle, diesel engines?（）AIn a two-stroke/cycle engine, the rings run hotter, requiring the end gap to be greaterBSome provision must be made in a two-stroke/cycle engine to keep the rings from binding in the portsCNo gap is required to exist between the ends of the ring when cold in a two-stroke/cycle engine, but a small gap is required in a four-stoke/cycle engineDThe gaps should be staggered on either side of a piston in a two-stroke/cycle engine, while staggering is not necessary in a four-stroke/cycle engine
单选题If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the （）.Acylinder compression pressure may not be high enoughBcylinder compression temperature may be too highCfuel oil injection pressure may not be high enoughDscavenge and purge process is incomplete
单选题Documentation of a software package is normally produced for two purposes. One is to explain the (1) ofthe software and describe how to use them. This is known as (2) because it is designed to be read by the user of the software. 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 ofthis type is known as ( 3 )空白（1）处填（）AplansBcostCfeaturesDschedules
单选题The purpose of the skirt or trunk in four-stroke cycle engines is to act in a similar manner to a （）.AcrossheadBcrownCpiston rodDconnecting rod
多选题Which two statements are true about a Work Item with "Open" Notification? （）(Choose two.)AThe Work Item is not eligible for Purge.BThe Work Item is eligible for a Permanent purge.CThe Work Item is eligible for a Temporary purge.DThe Work Item is not complete because it still has Open Notification.EThe Work Item is eligible for both Temporary and Permanent purge.
单选题The main purpose of the essay is to describe the life cycle of the lobsterAdescribe the life cycle of the lobsterBexplain the problems that arise when raising captive lobstersCshow that no matter what hatcheries do, they cannot help the lobstersDconvey the need for more funding for lobster hatcheriesEillustrate how and why lobster hatcheries work to maintain the lobster population