海船船员考试
单选题If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, the（）A oil has a tendency to emulsify in the bowlB purifier will act as a clarifier at the discharge ringC oil will be lost through the water discharge portsD o
题目
oil has a tendency to emulsify in the bowl
purifier will act as a clarifier at the discharge ring
oil will be lost through the water discharge ports
oil solids will be deposited only at the intermediate top disk
相似问题和答案
第1题：
If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, the
A.oil has a tendency to emulsify in the bowl
B.purifier will act as a clarifier at the discharge ring
C.oil will be lost through the water discharge ports
D.oil solids will be deposited only at the intermediate top disk
第2题：
A.Disk operation System
B.Disk System
C.Dine Ctoryoperation System
D.Diskette Operate System
第3题：
A.It can be applied to separate two liquids
B.It cannot separate solids which contaminated in the oil.
C.It consists of purifier and clarifier
D.The centrifuge arranged to separate two liquids is known as purifier
第4题：
You configured the default backup device type as disk for RMAN backups. In your database，because of business requirements，you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used. What must you set using the RMAN CONFIGURE command to achieve this？（）
- A、 MAXSETSIZE TO 2
- B、 DEVICE TYPE DISK PARALLELISM 2
- C、 RETENTION POLICY TO REDUNDANCY 2
- D、 DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2
正确答案:C
第5题：
When considering SAN to SAN replication between sites， which of the following is the MOST important concern？（）
- A、 WAN link speed
- B、 Block size
- C、 Disk size
- D、 File system type
正确答案:A
第6题：
For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the _______.
A.bowl periphery
B.bowl center
C.upper surface
D.lower surface
第7题：
High-speed rotation in a centrifugal purifier can produce a force ______the force of gravity.
A.many thousand times larger than
B.the same as
C.many thousand times smaller than
D.which has nothing to do with
第8题：
Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?
A.The viscosity of the fuel.
B.The quantity of water to be removed from the fuel.
C.The specific gravity of the fuel.
D.The quantity of dirt to be removed from the fuel.
第9题：
Which command is used to configure RMAN to perform a compressed backup for every backup executed？（）
- A、 BACKUP AS COMPRESSED BACKUPSET DATABASE
- B、 BACKUP AS COMPRESSED COPY OF DATABASE
- C、 CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET
- D、 CONFIGURE DEVICE TYPE DISK BACKUP TYPE COMPRESS
- E、 BACKUP DATABASE COMPRESS
正确答案:C
第10题：
In which situations will the ASM metadata backup help you recover the ASM disk in a disk group？（）
- A、 when one or more file directory paths are accidentally deleted from an ASM disk group
- B、 when one of the disks in a disk group is accidentaly unplugged
- C、 when the data file on an ASM disk group gets corrupted
- D、 when one or more disks in an ASM disk group are lost
正确答案:A,D