Hydronic Heating and Cooling Pretest -Posttest exam with verified solutions

HYDRONIC HEATING AND COOLING
PRETEST/POSTTEST EXAM WITH
VERIFIED SOLUTIONS




T/F
Forced-air tsystems tcost tless tthan thydronic tsystems tto toperate tand tmaintain
tbecause tof tthe tdurability tand tlong tlife tof tthe tequipment t- tcorrect tanswers t-False


T/F
Far tless twater tthan tair tis tneeded tto tdistribute tthe tsame tamount tof theat, tmeaning
tthat thydronic twater tdistribution tcan tuse tpiping tthat tis tmuch tsmaller tthan tthe
tequivalent tair tductwork. t- tcorrect tanswers t-True


T/F
For tpractical tpurposes, tenthalpy tmay tbe ttaken tas tthe tsum tof tsensible theat tand
tlatent theat. t- tcorrect tanswers t-True


T/F

, Heat ttransfer tis tthe tflow tof theat tfrom tone tobject tor tsubstance tto tanother, tand tit
toccurs tbecause tof ta tdifference tin tpressure. t- tcorrect tanswers t-False


T/F
Single-wall theat texchangers tare tless tefficient tthan tdouble-wall theat texchangers tof
tequal tsize. t- tcorrect tanswers t-False


T/F
The tcompressor tpumps tthe tvaporized trefrigerant taway tfrom tthe tevaporator tand
tdischarges tit tat ta thigher tpressure tand ttemperature tinto tthe tcondenser. t- tcorrect
tanswers t-True


T/F
A tdry tcooling ttower tis ta tcooling ttower twith topen twater tloops, tallowing tdirect tcontact
tbetween tcirculating twater tand toutside tair. t- tcorrect tanswers t-False


T/F
Rotary tpumps tdischarge tfluids tin tan terratic, tpulsating tflow. t- tcorrect tanswers t-False

T/F
The ttwo tmost tcommonly tused tcentrifugal tpump tsealing tmethods tare tthe tstuffing tbox
tseal tand tthe tmechanical tseal. t- tcorrect tanswers t-True


T/F
There tare tfour tbasic tclassifications tof tpumps. t- tcorrect tanswers t-False

T/F
In tair tcontrol tmanagement tsystems, tmanual tair tvents tare trecommended tto tbe
tinstalled tat tterminal tunits tand thigh tpiping tpoints. t- tcorrect tanswers t-True


T/F
All tpiping texpands twhen tcooled tand tcontracts twhen theated. t- tcorrect tanswers t-
False

T/F
A tlift tvalve tis ta thydronic tpiping tsystem tmonitoring tdevice tthat tis tequipped twith tan
tintegral tcheck tvalve tdesigned tto tminimize tsystem tfluid tloss twhen tsetting tup tto
tmonitor tpumps, theat texchangers, tvalves, tor tother tdevices thandling thot tor tcold
tHTF. t- tcorrect tanswers t-False


T/F
In ta tsingle tmain tsystem, tif tproper tair tcontrol tequipment tis tinstalled tat tthe theat
tsource, tfurther tventing tshould tnot tbe tnecessary t- tcorrect tanswers t-True


T/F
A tsingle tloop tsystem tcan tserve tthree tcircuits. t- tcorrect tanswers t-False