High-speed rotation in a centrifugal purifier can produce a force ______the force of gravity.A.many thousand times larger thanB.the same asC.many thousand times smaller thanD.which has nothing to do with
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
相关考题：
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
If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, theA.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.oil solids will be deposited only at the intermediate top disk
It has been decided that to be lawful merchandise， goods loaded under the charter-party must not only be such as can be loaded without breach of the law in force at the port of loading， but must also be such as can lawfully be carried and discharged at the ________ ．A.port of dischargeB.port of sailingC.port of flagD.port of departure
The numeral in the center of a wind rose circle on a pilot chart indicates the ______.A.total number of observationsB.average wind force on the Beaufort scaleC.average wind force in knotsD.percentage of calms
选择适当的用语补充对话。（） ——What did you feel during the massage？ ——I am feel comfortable____________.A、The force is too heavyB、The force is too bigC、The force is too lightD、The force is too suitable
单选题The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.Anorth magnetic poleBsouth magnetic poleCmagnetic prime vertical meridianDmagnetic equator
单选题The moment of a force is a measure of the（）.Aturning effect of the force about a pointBinstantaneous value of the forceCstability characteristics of the vesselDcenter of gravity location
单选题Which expression has the different meaning from entry into force ? “entry into force” means is（）.Acoming into effectBmoving to full effectCbeing based on forceDcoming into force
单选题Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.Aback current from the rudderBgreater pressure on the right or left side of the propeller，depending on rotationClower pressure on the right or left side of the propeller，depending on rotationDtorque from the velocity and angle at which the surrounding water impinges upon the propeller blades
单选题In a simple mechanical governor, the （）Acentrifugal force rotates the ball-headBflyweight centrifugal force is balanced by spring forceCflyweight centrifugal force is balanced by hydraulic pressureDspeeder spring alone actuates the fuel control rod
单选题A centrifugal impeller consists of a number of vanes curving （） from the direction of rotation.AbackwardsBforwardsCupwardDdownwards
单选题The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.APressure gradientBCoriolis effectCAurora borealisDBallistic deflection
单选题A centrifugal fuel oil purifier should be shut down if （）Amore sealing water is neededBthe cover clamp needs tighteningCthe purifier has a bad vibration when startedDwater is discharged from the overflow line
单选题High-speed rotation in a centrifugal purifier can produce a force （） the force of gravity.Amany thousand times larger thanBthe same asCmany thousand times smallerDnone of the above
单选题If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.Aa check valve will close that prevents reverse circulationBa centrifugal counterweight counteracts the force of gravityCthe electric pump motor will cut outDthe control lever will move to the stop position
单选题Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）ACarbon particlesBLube oilCGasolineDDiesel fuel
单选题The numeral in the center of a wind rose circle on a pilot chart indicates the （）.Atotal number of observationsBaverage wind force on the Beaufort scaleCaverage wind force in knotsDpercentage of calms
单选题He can't force them to do things, but he provides a constant reminder that these are moral questions, not _____ medical or economic ones.AperfectlyBquiteCconsiderablyDsimply
单选题Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）AImpuritiesBLube oilCGasolineDDiesel fuel
单选题选择适当的用语补充对话。（） ——What did you feel during the massage？ ——I am feel comfortable____________.AThe force is too heavyBThe force is too bigCThe force is too lightDThe force is too suitable
单选题When a vessel has positive stability，the distance between the line of force through B and the line of force through G is called the（）.Ametacentric heightBrighting armCrighting momentDmetacentric radius
单选题Reserve buoyancy is the（）.Aunoccupied space below the waterlineBvolume of intact space above the waterlineCexcess of the buoyant force over the gravity forceDdifference in the buoyant force in salt and fresh waters
单选题High-speed rotating in a centrifugal purifier can produce a force （） larger than the force of gravity.Amany thousand timesBbetween timesCone timeDat times
单选题To learn how to let go is not an easy lesson to learn, _____ when we are young and think that the world is ours to command, that whatever we desire with the full force of our passionate being can, nay, will, be ours.AmainlyBactuallyCespeciallyDinitially
单选题A spring-loaded centrifugal flyweight governor responds to reduced engine load with an immediate increase in （）Apilot valve oil pressureBspeeder spring forceCcompensation needle valve clearanceDcentrifugal force on the flyweights