after two unplanned service calls.
according to manufacturers specifications.
when the device is becoming unreliable.
every sixty days.
第1题：
If passengers are on board when an abandon ship drill is carried out，they should ______．
A.take part
B.watch
C.go to their quarters
D.stay out of the way and do what they want
第2题：
（）should be greased every month or two and it should be kept on a reel when not in use.
第3题：
A、carries out
B、carried out
C、was carried out
D、has carried out
第4题：
When is it advisable to dump the waste toner from a technicians service vacuum？（）
第5题：
You are the network administrator for All network servers run Windows Server 2003. Recently, another network administrator create a scheduled task to perform a normal backup of Microsoft Exchange Server 2003 compuer every Saturday night. You need to perform maintenance tasks on the Exchange server on this Saturday night only. If the backup starts while you are performing the maintenance tasks,data might be corrupted. You need to ensure that the backup task does not start while you perform the maintenance tasks. What are two possible ways to achieve this goal? (Each correct answer presents a complete solution.（）Choose two.)
第6题：
第7题：
Scheduled preventative maintenance visits should be carried out：（）
第8题：
Preventive maintenance______.
A.should not be carried out during the watches
B.can only be carried out in port
C.is a kind of maintenances carried out prior to the occurrence
D.is a kind of maintenances carried out after the occurrence
第9题：
As a best practice， when should the server be rebooted to apply the reboot required patches？（）
第10题：
Which two statements are true with respect to the maintenance window？（） .