pec电气工程专业英语证书考试-电气工程专有名词2

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1、PEC电气工程专业英语证书考试-GlossaryofElectricalEngineeringTerms2A*absolutevalue Valueofanexpressionwithoutregardtosignorphaseangle.*absolutezero Thetemperaturewherethermalenergyisatminimum.-273.15�Cor0Kelvin.*ac [seealternatingcurrent]*accessory Adevice,otherthancurrentusingequipment,

2、associatedwithsuchequipmentorwiththewiringofaninstallation.*acceleration Rateofchangeofvelocity.[Unit:m/s2]*accelerationduetogravityg Accelerationofabodyfallingfreelyinavacuumasaresultofthegravitationalpulloftheearth.g=9.807m/s2*accumulator Storagebatteryorsecondarycellfors

3、toringelectricity.*accuracy Specifiesthenearnessofthemeasuredvaluefromthetruevalue.*acid Containinganexcessofhydrogenionsoverhydroxylions.*acoustics Studyofsound.*acpotentiometer Anapparatusforthecomparisonofa.c.voltages.Balancerequiresboththemagnitudeandthephaseangleoftheu

4、nknownvoltagetobebalancedwiththeknownvoltage.Thismaybedoneeitherincartesianformorinpolarform.*acre UnitofareaintheImperialsystem.1acre=4047m2 =0.4047hectares*activeelement Anelementcapableofgeneratingelectricalenergy.*activefilter Anyfilterusinganopampiscalledanactivefilter

5、.*actuator Mechanicalpartofalimitswitchthatusesmechanicalforcetoactuatetheswitchcontacts.*acuteangle Anangleoflessthan90o.*address Thenumberthatuniquelyidentifiesthelocationofawordinmemory.*adiabatic processtakingplacewithoutheatenteringorleavingthesystem.*admittance Recipr

6、ocalofimpedance.Ratiooftheelectriccurrenttothevoltage.[Unit:siemensorS]*aerodynamics Studyofairmovingaroundsolidobjects,orairflowingaroundastationarystructure.*airconditioning Thecontroloftemperature,humidityandthepurityoftheair.IntropicalcountrieslikeSriLanka,airconditioni

7、ngonlycoolstheairandnotheatsit,butincoldcountriesbothmodesareavailable.*algebraicsum Totalofanumberofquantitiesofthesamekind,withdueregardtosign.*algorithm Asystematicmathematicalprocedurewhichenablesaproblemtobesolvedinadefinitenumberofsteps.*alkaline Containinganexcessofh

8、ydroxylionsoverhydrogenions.*alloy Acompositionoftwoormoremetals.*alphanumeric The