三管轮轮机英语试题 泵教材.docx
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三管轮轮机英语试题 泵教材.docx
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三管轮轮机英语试题泵教材
1079._____attheendofthedistributionpipeensuresthatadequatepressureismaintainedbythepump.
A.AreliefvalveB.Analarm
C.ApressuregaugeD.Anon-maimvalve
1080.Ingeneral,_____issuitablefordeliveringsmallquantitiesathighpressure.
A.reciprocatingpumpB.gearpump
C.centrifugalpumpD.vanepump
1081.Thepumpsemployedonboardshipcanbedividedintotwomaincategoriesi.e._____pumpsandcentrifugalpumps.
A.gearB.nonpositivedisplacementC.positivedisplacementD.rotary
1082.Lubeoilpumpstakingsuctionfromthesumpofmostsmallmarineenginesareusually_____.
A.ofthediaphragmtypeB.ofthecentrifugaltype
C.ofthepositivedisplacementtypeD.independentlydrivenbyelectricmotors
1083.Thelubeoilpumpusedinadieselengineisa_____.
A.volutepumpB.centrifugalpump
C.diaphragmpumpD.gearpump
1084.Whichofthefollowingconditionscouldcausethefeedpumpforanauxiliaryboilertolosesuction?
A.Increasedsuctionheadpressure.B.Decreasedfeedwatertemperature.
C.Pumprecirculatinglinebeingopentoomuch.D.Excessivefeedwatertemperature.
1085.Avanepumpbelongsto_____accordingtoitsworkingprinciple.
A.reciprocatingpumpB.positivedisplacementpump
C.centrifugalpumpD.centripetalpump
1086.Througha_____pump,theliquidistransferredfromthesuctiontothedischargebythemechanicalvariationofthevolumeofachamberorchambers.
A.positivedisplacementB.ejectorC.centrifugalD.aircompressor
1087.Amono-pumpisasingle-screwpump.Thatmeansitconsistsof_____rotor(s).
A.oneB.twoC.threeD.four
1088.Thegearandscrewpumpsareclassifiedas_____.
A.variablestrokepumpsB.multistagepumps
C.positivedisplacementpumpsD.triple-portedpumps
1089.Gearpumpsareofpositivedisplacementtypepumpsbecausetheydischargeanearconstantamountofliquid_____pressure.
A.dependingonB.inrelativetoC.regardlessofD.becauseof
1090.Agearpumpbelongsto_____accordingtoitsworkingprinciple.
A.reciprocatingpumpsB.positivedisplacementpumps
C.centrifugalpumpsD.centripetalpumps
1091.Thepressureheadofapumpisgivenintheunitof_____.
A.kgB.MPaC.meterfluidcolumnD.Noneoftheaboveistrue.
1092.Acentrifugalpumpproducestherequiredpressureenergybymeansofarotating_____providedwithvanes.
A.propellerB.impellerC.circumferenceD.screw
1093.Thedischargeflowofareciprocatingpumpis_____.
A.steadyB.inpulsationC.continuousD.large
1094.Ina_____thecenterscrewisdrivenandtheouterscrewsidle.
A.singlescrewpumpB.double-screwpumpC.triplescrewpumpD.centripetalpump
1095.AScrewpumpbelongsto_____accordingtoitsworkingprinciple.
A.reciprocatingpumpsB.positivedisplacementpumps
C.centrifugalpumpsD.centripetalpumps
1096.Theamountoffluiddeliveredbyascrewpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedoftherotor
C.eitherAorBD.Noneoftheaboveistree.
1097.Whileflowingthroughthevoluteinacentrifugalpump,partofthe_____energyoftheliquidisconvertedto_____energy.
A.kinetic/pressureB.kinetic/essentialC.pressure/kineticD.pressure/height
1098.Theamountoffluiddeliveredbyacentrifugalpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedoftherotor
C.eitherAorBD.Noneoftheaboveistree.
1099.Theamountoffluiddeliveredbyareciprocatingpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedofthepiston
C.eitherAorBD.Noneoftheaboveistree.
1100.Theamountoffluiddeliveredbyapositivedisplacementpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedofthedrivingrotor
C.eitherAorBD.Noneoftheaboveistree.
1101.Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump?
(1)reciprocating;
(2)rotary;(3)centrifugal.
A.
(1)onlyB.
(1)and
(2)C.
(1),
(2)and(3)D.
(2)and(3)
1102.Theamountoffluiddeliveredbyahelicalpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedoftherotor
C.eitherAorBD.Noneoftheaboveistree.
1103.Apositivedisplacementpumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedto_____andthendecreasedto_____.
A.drawtheliquidin/forcetheliquidout
B.forcetheliquidout/drawtheliquidin
C.suction/draw
D.deliver/outlet
1104.Throttlinginthe_____lineofacentrifugalpumpinvolvestheriskofthepumpcavitation.
A.suctionB.exhaustC.pressureD.discharge
1105.Asforahydraulicsingleactionvanepump,theinnerwallofthestatorisusuallyof_____shape.
A.circularB.ellipticalC.rectangularD.hexagon
1106.Asforahydraulicvanepump,whichofthefollowingisincontactwiththevanesduringworking:
(1)therotor;
(2)thepumpshaft;(3)theexternalsurfaceofthehousing.
A.
(1)onlyB.
(2)onlyC.
(1)and
(2)D.
(1),
(2)and(3)
1107.Shaftsealinginacentrifugalpumpcanbeeffectedby_____.
A.themechanicalsealB.packedstuffingboxes
C.eitherAorBD.neitherAnorB
1108.Areciprocatingpumpbelongsto_____accordingtoitsworkingprinciple.
A.injectorpumpsB.positivedisplacementpumps
C.centrifugalpumpD.centripetalpumps
1109.A_____pumpisthatwherethevolumeofthepumpchamberisalternatelyincreasedtodrawtheliquidinandthendecreasedtoforcetheliquidout.
A.injectorB.positivedisplacementC.centrifugalD.centripetal
1110.Whatisthepurposeofareliefvalve?
A.tofill2tanksatthesametimeB.tousepumpatahigherpressure
C.toreturnliquidtosuctionsideifdischargevalveisclosed
D.Alloftheabovearetrue.
1111.Thepumpdischargepressurewillbeconsiderablyhigherthanthepressureatthe_____.
A.pumpentrybranchB.outletpipe
C.impellerD.Noneoftheaboveistrue.
1112.Whichofthefollowingpumpsbelongstocentrifugalpump?
A.PistonpumpB.ScrewpumpC.DiffuserpumpD.Water-ringpump
1113.Thevolutepumpisoneinwhichtheimpeller_____.
A.dischargesintoagraduallywideningchannelB.hasstationarydiffuservanes
C.producesnokineticenergyD.Alloftheabovearetrue.
1114.In_____pumpsacloseddischargevalvewillcauseburstingdischargepressure.
A.centrifugalB.plungerC.injectorD.water
1115.Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump;
(1)ejector;
(2)screw;(3)centrifugal.
A.
(1)onlyB.
(1)and
(2)C.
(1),
(2)and(3)D.
(2)and(3)
1116.Theamountoffluiddeliveredbyagearpumpcanberegulatedby_____.
A.throttlingthepressurelineB.changingthespeedoftherotor
C.eitherAorBD.Noneoftheaboveistrue
1117.Attemptsaremadetoeliminateaxialthrustincentrifugalpumpby_____.
A.providingtheimpellerwithbalancingholesB.theuseofsymmetricalimpeller
C.neitherAnorBD.eitherAorB
1118.Whichofthefollowingpumpswillbuildupaburstingpressureorstalltheirmotorsifthedischargevalvesareclosed?
(1)gear;
(2)centrifugal;(3)screw.
A.
(1)and
(2)B.
(1),
(2)and(3)C.
(1)and(3)D.
(2)and(3)
1119.Whichofthefollowingoperatingfeaturesdodisplacementpumpsbeariftheyareworkingunderno-cavitationcondition?
(1)outputisalmostdirectlyproportionaltospeed;
(2)theyareself-priming;(3)theywilldevelopadischargedpressureequaltotheresistancetobeovercome,irrespectiveofspeed.
A.
(1)and
(2)B.
(2)and(3)C.
(1)and(3)D.
(1),
(2)and(3)
1120.The_____pumpdischargesanearlyconstantamountofliquidregardlessofpressure.
A.mixed-flowB.axial-flowC.centrifugalD.displacement
1121.Whichofthefollowingpumpsisusedwherearelativelyhighpressureandsmallcapacityarerequired?
A.VolutepumpB.Diffuserpump
C.RegenerativepumpD.Alloftheabove
1122.Somepumpsusepackingassealinggland.Theglandshouldbe_____.
A.slackenoughtoallowslightleakageoffluidB.slightlyclocked
C.broughtuptightsoasnottoallowanyleakageD.fittedwithareliefvalve
1123.Airchambersareusuallyfittedtoreciprocatingpumpsinorderto_____.
A.increasedischargepressureB.increasesuctionvacuum
C.developpulsationflowD.keepasteadyrateofflow
1124.Thepipefrictionandtheresistancewill_____asaresultofanincreaseintheamountoffluidflowingthroughthesystem.
A.reduceB.riseC.raiseD.fall
1125.Whichofthefollowingwillbetheadvantageofacentrifugalpumpascomparedwithareciprocatingpump?
(1)Itsdischargeiscontinuous;
(2)Ithasnointernalvalves;(3)Uponaccidentalclosingofdischargevalve,excessivepressurewillnotbuildup.
A.
(1),
(2)B.
(2),(3)C.
(1),
(2),(3)D.
(2)only
1126.Whichofthefollowingpumpsareself-priming,andcandealwithliquidfromalevelbelowthepump:
(1)reciprocating;
(2)vane;(3)gear.
A.
(1)onlyB.
(1)and
(2)C.
(2)and(3)D.
(1),
(2)and(3)
1127.Centrifugalpumpscanbedesignedwithanumberofimpellers_____toattainahighfinaldeliverypressure.
A.inseriesB.inparallel
C.eitherAorBD.Noneoftheaboveistree
1128.Withreferencetoanaxialpistonpump,whichoneofthefollowingstatementsistrue?
A.Thecylindricalbarreliscoupledtothemotor.
B.Thecylindricalbarrelhasanoddnumberofbores.
C.Theboresendinsockets.
D.Thesocketsfitintheswashplate.
1129.Withreferencetoaradialpistonpump,whichoneofthefollowingstatementsisfalse?
A.Surroundingthefixedshaftisahollowshaft.
B.Thishollowshaftcarriesradialbores.
C.Eachboreisfittedwithawell-lappedplunger.
D.
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