水力学基础试题en

《水力学基础试题en》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、AdvancedFluidBehaviour水力学基础测试题共分四部分：一、staticGradients、二、FlowingGradients三、pumpgradients四、pipelineoperation一、staticGradients1.Pressureis________.a)forceactingonaunitofareab)massactingonaunitofareac)massperunitofvolumed)forceperunitofmass2.Theunitsusedforpressureare________

2、.a)kgb)m3/hrc)kPad)aandcabove3.Onasmallvolumeoffluid,pressureacts________.a)moreforcefullyonthebottomb)moreforcefullyonthetopc)uniformlyinalldirectionsd)againstthedirectionofflow4.Inafluidconfinedbysolidboundaries,pressureacts________.a)againstthedirectionofflowb)withthed

3、irectionofflowc)paralleltotheboundaryd)perpendiculartotheboundary5.Inaclosedsystem,apressurechangeproducedatonepointwill________.a)movedownstreamonlyb)betransmittedthroughouttheentiresystemc)moveupstreamonlyd)onlyaffecttheimmediateareaofthechange6.Gaugepressureisthediffer

4、encebetween________.a)referencepressureandabsolutepressureb)referencepressureandatmosphericpressurec)avacuumandzeropressured)absolutepressureandatmosphericpressure7.Avacuumexistswhenthegaugepressureis________.a)belowzerob)abovezeroc)largerthan101.3kPad)smallerthan101.3kPa

5、8.Ifatmosphericpressureis101.3kPa,thenthelowestpossiblegaugepressureis________.a)0kPaAdvancedFluidBehaviourb)101.3kPac)-101.3kPad)thereisnolowestpossiblegaugepressure9.Asealedcontainercontainsfluidatagaugepressureof689.5kPawhentheatmosphericpressureis101.3kPa.Itistakenint

6、othemountains,wheretheatmosphericpressureisless.ThegaugepressureofthefluidinthecontainerIa)lessthan689.5kPab)greaterthan689.5kPac)unchangedat689.5kPad)gaugepressureisnotdependentonatmosphericpressure10.Asealedvesselcontainsfluidatanabsolutepressureof689.5kPaatanatmospheri

7、cpressureof101.3kPa.Inthemountains,wheretheatmosphericpressureisless,theabsolutepressureofthefluidinthecontainerinthemountaina)lessthan689.5kPab)greaterthan689.5kPac)unchangedat689.5kPad)notenoughinformationisgiven11.Oneatmospherealwayshasagaugepressureofzero.a)Trueb)Fals

8、e12.Apressuremeasurementrelativetoavacuumiscalled________.a)gaugepressureb)Bourdonpressurec)abso