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ID:19626647
大小:134.00 KB
页数:21页
时间:2018-10-04
《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
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