高级管道工理论知识试卷（advanced plumbing theory knowledge test paper）

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1、高级管道工理论知识试卷（Advancedplumbingtheoryknowledgetestpaper）Advancedplumbingtheoryknowledgetestpaper(h-2)partoftheanswertoobjectivequestionsMultiplechoiceHydraulicpipebendingmachineisgenerallyusedforbendingthediameterofthetubenotexceeding(A)mmA.44.5B.45.5C.46.5D.47.5Thebendingradiusofthebend

2、ingbendshouldnotbelessthanthediameterofthetube(A)A.3.5B.4C.4.5D.5Whenthediameterofthebenttubeisgreaterthan(C)mm,thebentcorerodmustbeplacedinsidethetube.A.80B.70C.60D.50Generally,afterthetubeisbent,thethicknessofthetubewallshouldnotexceed(C).A.5%B.8%C.15%D.20%Whenthetemperatureofthetub

3、eislessthan(B),compensationisnotconsidered.A.300CB.320CC.340cD.360cThetensiledeviationofthepretensioningwaveformisnotgreaterthan(A)mm.A.5B.10C.15D.20Theinnerliningofthewaveformextenderisweldedtothesideofthewallofthewallandtheotherendcanbe(C).A.FixedB.WeldingfixedC.I'mgoingtomoveD.Thre

4、adfixedThetensiledeviationshouldnotbegreaterthan(B)mmaftertheliftingofthesquareextender.A.Plusorminus5,B.Plusorminus10C.Plusorminus15C.Plusorminus20Differentflowrateshavethepipediametercorrespondingtotheeconomicvelocity,whichisthe(A)oftheflow.A.EconomicpipediameterB.EconomictrafficC.N

5、ominalpipediameterD.nominalflowThemaximumvelocityis(C)inthepipenetworktopreventthedamagecausedbywaterhammer.A.0.5-0.7m/SB.1-1.6m/SC.2.5-3m/SD.3-3.6m/SForgas,hydrogen,lowpressureairandotherdielectricpipes,itisgenerallyused(B)pressuregauge.A.SpringtubeB.DiaphragmtypeC.It'stheacetylenety

6、peD.OxygentypeTherotorflowmeterisapplicabletothepipelineunderpressurenotgreaterthan(B).A.0.098MpaB1.96mpaC.5.88mpaD.6.3mpaTheu-tubepressuregaugeshallbelocatedwithintherangeoftheambienttemperature(C).A.10-500cB.15-600-CC.10-600-cD.20-600-cWhenthepressuregaugeofthespringtubeismeasuringt

7、hepipewithfluctuatingpressure,theindicatorscaleoftheinstrumentshallbethemaximumscaleofdial(C).A.2/3B.Three-quartersofC.1/2D.AthirdThetubebetweentwoadjacentfixedbracketsshallbeAstraightline,andthedeviationofeach10mshallnotbegreaterthan(A)mm.A.5B.3C.7D.9Thepipeconnectionportshallnotbepl

8、acedi