HVAC Excellence - ELECTRICAL, WEEK 1 - April 11th - 15th Questions & Answers

HVAC Excellence - ELECTRICAL, WEEK 1
- April 11th - 15th Questions & Answers
CurrentAflowAisA-ACORRECTAANSWERSA-TheAflowAofAelectronsAinAtheAcircuit
ImpedanceAisA-ACORRECTAANSWERSA-OppositionAtoAalternatingAcurrentAflow.
LikeAcharges;A-ACORRECTAANSWERSA-repelAeachAother.
AnyAmaterialAthatAwillAreadilyAreleaseAelectronsAisAcalled;A-ACORRECTAANSWERSA-
AAconductor
TheAsymbolAforAcurrentAis;A-ACORRECTAANSWERSA-I
WhichAofAtheAfollowingAmaterialsAwouldAbeAbestAsuitedAforAuseAasAaAsemi-conductor?A-
ACORRECTAANSWERSA-silicon

TheAsafetyAgroundAconductorAisAusuallyAcolorAcoded;A-ACORRECTAANSWERSA-
greenAorAbare.
AnAelectronAhas;A-ACORRECTAANSWERSA-aAnegativeAcharge.
ResistanceAis:A-ACORRECTAANSWERSA-OppositionAtoAcurrentAflow.
HowAmanyAwattsAofApowerAareAusedAbyAaAheaterAoperatingAatA240AvoltsAandAdrawingA5Aam
ps?A-ACORRECTAANSWERSA-1200Awatts
WhichAofAtheAfollowingAmetersAmustAuseAitsAinternalApowerAtoAcheckAaAloadAorAcircuit?A-
ACORRECTAANSWERSA-Ohmmeter

InAelectricalAwiring,AaAblackAcoloredAwireAinAanAalternatingAcurrentAcircuitAusuallyAindicates;
A-ACORRECTAANSWERSA-theAhotAconductor.

FusesAareAsizedAby:A-ACORRECTAANSWERSA-VoltsA&AAmps
WhatAwouldAbeAtheAresultAifAaA24Avolt,A20-
ohmAlowAvoltageAcontactorAcoilAwereAwiredAinAseriesAwithAaA24Avolt,A200-
ohmAcontrolArelayAcoil?A-ACORRECTAANSWERSA-OnlyAtheAcontrolArelayAwouldAoperate.
ThreeAdefrostAheaters,AeachA15AohmsAareAwiredAinAparallelAtoAaA120AvoltApowerAsupply.AH
owAmanyAwattsAofApowerAwillAbeAused?A-ACORRECTAANSWERSA-2880AWatts
WhichAofAtheAfollowingAisAgenerallyAconsideredAtoAbeAwithinAtheAmaximumAallowableA(plus
AorAminus)AsupplyAvoltageAvariation?A-ACORRECTAANSWERSA-5%

CapacitorsAareAratedAinA-ACORRECTAANSWERSA-MicrofaradsA&AVolts.
WhenAtestingAaAcapacitorAwithAanAanalogAorAdigitalAohmmeter,AtheAmeterAshould;A-
ACORRECTAANSWERSA-measureAlowAresistanceAthenAreturnAtoAhighAreading.

WhatAisAtheAtermAusedAtoAdescribeAtheAoutputAsideAofAaAtransformer?A-
ACORRECTAANSWERSA-SecondaryAside.

OneAhorsepowerAisAequalAtoA__________Awatts.A-ACORRECTAANSWERSA-746
HowAmuchAresistanceAmustAbeAplacedAinAaA120AvoltAcircuitAinAorderAtoAlimitAtheAcurrentAtoA
2Aamps?A-ACORRECTAANSWERSA-60AOhms
AAparallelAcircuitAcontainsAaA18AohmAandAaA9AohmAresistor.ATheAtotalAresistanceAequals;A-
ACORRECTAANSWERSA-6Aohms.

InAaAseriesAcircuit,AtheAvoltageAdropAacrossAeachAresistanceA(load)Awill.A-
ACORRECTAANSWERSA-addAupAtoAequalAtheAsourceAvoltage.

TheAtotalAresistanceAofAaAparallelAcircuitAwillAbe;A-ACORRECTAANSWERSA-
lessAthanAtheAsmallestAresistance.