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1、制冷试题(b卷)（Refrigerationtest(bcoil)）OperationmanagementsystemtechnologycenterequipmentmanagementdepartmentRefrigerationtest(Bcoil)First,themultiple-choicequestion:1,theroleofcompressedoilis(A)sealingandsilencing.A,lubricationB,cooldownC,soundinsulation2、refrigerationworks
2、hopdailydetectionofammonialeak,use(B)testpaperorammoniadetectionportableinstrument.Ifthetestpaperisused,theoperatorshallhaveaclearunderstandingofhowthetestpaperistobeused.A,PHB,phenolphthaleinC,alcohol3,themaincharacteristicoffrozenoilis(C).A,hightemperaturewithoutsolid
3、ificationB,hightemperaturewithoutvaporizationC,resistanttolowtemperaturewithoutsolidification4,refrigerantvapordischargedbythecompressoriscalled(A).A,superheatedsteamB,subcooledvaporC,saturatedvapor5,theactualcycleofthecompressorthroughfourprocesses,theyare(B).Asuction,
4、exhaust,expansion,compressionBsuction,compression,exhaust,expansionCsuction,expansion,exhaust,compression6,thetransmissionmechanismofthecompressorreferstothepiston,connectingrod,crankshaftand(A)andsoon.A,couplingsB,motorC,airvalve7refrigerantinthecondenseris(C)state.A,s
5、upercoolingB,overheatingC,saturated8,refrigerationequipment,withthechangesinheatload,theamountofliquidsupplyshouldbeWiththeincreaseofheatload,theamountofliquidsupplyincreased(A).A,theheatloadisreduced,andtheliquidsupplyisincreasedB,heatloadincreased,thesupplyofliquidrem
6、ainedunchanged9,whenhotammoniadefrost,thepressurebeforeenteringtheevaporatorshallnotexceed(C).A,3.0MpaB,1.8MpaC,0.8Mpa10,refrigerantinuse,andopenflamedistanceisgenerallynotlessthan(C).A,1metersB,3metersC,10meters11.Therefrigerantintheevaporatorisendothermicandvaporizedu
7、nder(A).A,isothermalisobaricB,isothermalnonisobaricCandisobaricnonisothermal12.Whentheairconditioneriscooled,condensationwaterappears,atthistimetheevaporator(B).TheprocessofincreasingAanddrynessTheprocessofreducingBanddrynessTheprocessofconstantdryingofC14,compressedair
8、,steampressure(A),nooilandwater,dryingrateof100%.A,8-9B,7-8C,6-715,theevaporationtemperatureofasingle-stagevap
