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单选题
A centrifuge of which the bowl is arranged as the upper and lower parts separate discharges the sludge（）
A
by opening the separator manually
B
by separating the lower part from the upper part automatically
C
by separating the upper part from the lower part automatically
D
continuously
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(A)arranged to(B) arranged of(C) arranged in(D) arranged with
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Which of the following is NOT true about the centrifugal separator?
A.It can be applied to separate two liquidsB.It cannot separate solids which contaminated in the oil.C.It consists of purifier and clarifierD.The centrifuge arranged to separate two liquids is known as purifier
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A centrifuge arranged to separate two liquids is known asA.an oily water separatorB.a purifierC.a centrifugal compressorD.a clarifier
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For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the _______.A.bowl peripheryB.bowl centerC.upper surfaceD.lower surface
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When a clarifier is running the impurities and water collect at the bowl _____.A.centerB.peripheryC.inletD.upper parts
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Pedestal cranes have limit switches to restrict movement of which function（s）________．A.Hoist upper & lower limitsB.Luff travel limitsC.Rider block hoist upper & lower limitsD.All of the above
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In Chinese when someone breaks a bowl or a plate, the host or the people present are likely to say ---碎碎（岁岁平安）as a means of controlling the forces which they believe feel might affect their lives. Which function does it perform?A.Interpersonal
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C.Performative
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Which attribute of a logical volume can NOT be changed after it is created？（）A、The placement of the logical volumeB、The stripe size of the logical volumeC、The upper bound of the logical volumeD、The intra-policy of the logical volume
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What does the DB_FLASHBACK_RETENTION_TARGET parameter configure?（）A、An upper limit on how far you can flash back the database, depending on the information in the redo logsB、An upper limit on how far you can flash back the database, depending on the information in the undo tablespaceC、The amount of time for which the flashback data is to be kept in the flash recovery area, provided that there is enough spaceD、The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace, provided that there is enough space
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Which statement is correct about the number of available QoS system classes in FCoE？（）A、 It’s hard-set and cannot be disabledB、 It’s configurable， with an upper limit of 16C、 It’s hard-set but cannot disable best-effort and Fibre ChannelD、 It’s hard-set but can disable all but one classE、 It’s configurable with an upper limit of eight
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单选题Modern centrifuge designs enable continuous over a considerable period of timeThis is achieved by which is timed to discharge the sludge at regular intervals（）A
an injection processB
an ejection processC
a separation processD
a heating process
考题
单选题Which of the following will increase the height of the center of buoyancy for your vessel?（）.A
Discharging weight from lower decksB
Loading weight in upper decksC
Shifting weight from lower to upper decksD
Shifting weight from upper to lower decks
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单选题Which of the following will increase the positive stability of your vessel?（）.A
Loading weight on deckB
Discharging weight from lower decksC
Shifting weight from upper to lower decksD
Shifting weight from lower to upper decks
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单选题Which statement is correct about the number of available QoS system classes in FCoE？（）A
It’s hard-set and cannot be disabledB
It’s configurable， with an upper limit of 16C
It’s hard-set but cannot disable best-effort and Fibre ChannelD
It’s hard-set but can disable all but one classE
It’s configurable with an upper limit of eight
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单选题To start the ejection process the oil feed to the centrifuge is first shut off and the oil remaining in the bowl removed by admitting （）.A
flashing waterB
operating oilC
flushing waterD
sealing water
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单选题“A centrifuge consists of an electric motor driving a vertical shaft on the top of which is mounted the bowl assembly”.According to this sentence, we can know that is mounted on the top of the vertical shaft（）A
a centrifugeB
an electric motorC
a bowl assemblyD
a driving motor
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单选题A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）A
GasolineB
WaterC
Lubricating oilD
sulphur compounds
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单选题Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?（）A
The viscosity off the fuelB
The quantity of water to be removed from the fuelC
The specific gravity of the fuelD
The quantity of dirt to be removed from the fuel
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单选题When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated （）.A
clockwise, due to the bowl rotating clockwiseB
clockwise, due to the bowl rotating counterclockwiseC
counterclockwise, due to the bowl rotating clockwiseD
counterclockwise, due to the bowl rotating counterclockwise
考题
单选题What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）A
An upper limit on how far you can flash back the database，depending on the information in the redo logsB
An upper limit on how far you can flash back the database，depending on the information in the undo tablespaceC
The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough spaceD
The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space
考题
单选题Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.A
bottomB
topC
centerD
periphery
考题
单选题A centrifuge arranged to separate impurities and small amounts of water from oil is known as （）.A
an oily water separatorB
a purifierC
a centrifugal compressorD
a clarifier
考题
单选题A centrifuge arranged to separate two liquids is known as （）.A
an oily water separatorB
a purifierC
a centrifugal compressorD
a clarifier
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单选题One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）A
flattening of the bowl neoprene O-ringsB
operation within the explosive rang of the fuelC
excessive purifier operating pressuresD
excessive oil viscosity
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单选题Pedestal cranes have limit switches to restrict movement of which function（s）（）.A
Hoist upper lower limitsB
Luff travel limitsC
Rider block hoist upper lower limitsD
All of the above
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单选题At ground level, nitrous oxides are bad enough, but when up high, atmospherically they bond with free ions to create dangerous smog particles.A
but when up high, atmospherically theyB
however, it is in the upper atmosphere in which it mayC
but in the upper atmosphere, theyD
however, but once in the upper atmosphere it is known toE
as in the upper atmosphere they
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