ASE HVAC EXAM PRACTICE QUESTIONS
AND RIGHT ANSWERS 2024 - 2025
What,would,be,the,most,likely,result,of,a,missing,AC,compressor,clutch,diode?,ANS,-Damage,to,the,ECM
Tech,A,says,that,the,service,fittings,for,R-134a,are,the,same,as,the,service,fittings,for,R-
12.,Tech,B,says,the,low-side,service,fitting,is,a,16mm,quick-connect,and,high-side,is,13mm,quick-
connect.,Who,is,right?,ANS,-Neither
An,inoperative,cable-
controlled,heater,control,valve,is,being,diagnosed.,The,control,moves,freely,,but,the,valve,does,not,respo
nd.,Tech,A,says,the,cable,housing,clamp,may,be,loose,at,the,panel,end.,Tech,B,says,the,cable,may,be,ruste
d,in,the,housing.,Who,is,right?,ANS,-A,only
Tech,A,says,that,the,scan,tool,receives,data,from,the,vehicle,by,communicating,on,the,data,bus,network.,
Tech,B,says,that,if,one,of,the,two,data,bus,wires,becomes,broken,,then,the,network,still,communicates,on
,the,remaining,good,wire,but,will,set,a,trouble,code.,Who,is,right?,ANS,-Both
The,tool,in,the,figure,above,is,used,to,remove,and,install,which,AC,component?,ANS,-The,Orifice,tube
Referring,to,the,figure,above,,the,blend,door,gets,jammed,in,the,middle,of,the,travel,area.,What,is,the,mo
st,likely,system,fault?,ANS,-The,HVAC,air,temp,could,not,be,regulated.
Which,AC,related,procedure,would,the,above,tool,be,used,for?,ANS,-Testing,the,refrigerant,for,impurities.
Referring,to,the,figure,above,,what,would,the,HVAC,malfunction,if,the,component,became,restricted?,AN
S,-Low,airflow,from,the,ducts.
Referring,to,the,figure,above,,the,AC,compressor,clutch,will,not,engage.,Tech,A,says,that,the,AC,clutch,rel
ay,could,be,bypassed,with,a,fused,jumper,to,test,the,load,side,of,the,circuit.,Tech,B,says,that,fuse,17,sends
,power,to,the,AC,compressor,clutch,relay.,Who,is,right?,ANS,-A,only