ACI VERBAL EXAM QUESTIONS AND
ANSWERS
Whatvfmustvfoccurvfbeforevfavfsamplevfofvfconcretevfcanvfbevftakenvffromvfavfrevolvingvfdru
mvfmixer?vf-vfanswer--•Allvfwatervfandvfadmixturesvfmustvfbevfaddedvftovfthevfmixer.
Whenvfsamplingvffromvfavfstationaryvforvfrevolvingvfdrumvfmixer,vfwhatvfisvfcollectedvfandvf
whenvfisvfitvftakenvfduringvfdischarge?vf-vfanswer--•vfInvftwovforvfmorevfportionsvfofvfconcrete
•vfAtvfregularlyvfspacedvfintervals
•vfFromvfthevfmiddlevfofvfthevfbatch
Howvfarevfthevfsamplevfportionsvfobtainedvffromvfthevfdischargevfstreamvfofvfavfstationaryvfo
rvfrevolvingvfdrumvfmixer?vf-vfanswer--
•Repeatedlyvfpassvfavfreceptaclevfthroughvfthevfentirevfdischargevfstream
•vfCompletelyvfdivertvfthevfdischargevfstreamvfintovfavfsamplevfcontainer
Describevfthevfprocedurevfforvfcollectingvfavfsamplevffromvfavfpavingvfmixer.vf-vfanswer--
•vfDischargevfthevfcontentsvfofvfthevfpavingvfmixer
•vfObtainvfsamplesvffromvfatvfleastvffivevfdifferentvfportionsvfofvfthevffile
Whatvfisvfthevfminimumvfsizevfforvfavfsamplevfwhenvfstrengthvftestvfspecimensvfarevftovfbevf
moulded?vf-vfanswer--•vf28vfLvf
vf[vf1vfcfvf]
Whatvfisvfthevfmaximumvfallowablevftimevfbetweenvfobtainingvfthevffirstvfandvffinalvfportions
vfofvfthevfcompositevfsample?vf-vfanswer--•vf15vfmin
Whatvfactionvfisvfrequiredvfaftervfthevfindividualvfconcretevfsamplesvfhavevfbeenvftransport
edvftovfthevfplacevfwherevftestsvfarevftovfbevfperformed?vf-vfanswer--
•vfCombinevfandvfremixvfthevfsamplesvfwithvfavfshovel
WhatvfshouldvfbevfdonevfifvfThevfconcretevfcontainsvfaggregatevflargervfthanvfisvfappropriat
evfforvfthevfsizevfofvfthevfmoldsvforvfequipmentvfbeingvfused?vf-vfanswer--•vfWetvfseiving
Startvfthevftestsvfforvfslump,vftemperature,vfandvfairvfcontentvfwithinvfhowvfmanyvfminutesvfa
ftervfobtainingvfthevffinalvfportionvfofvfthevfcompositevfsample?vf-vfanswer--•vf5min
Startvfmouldingvfspecimensvfforvfstrengthvftestsvfwithinvfhowvfmanyvfminutesvfaftervffabrica
tingvfthevfcompositevfsample?vf-vfanswer--•vf15vfmin
Fromvfwhatvfmustvfthevfconcretevfsamplevfbevfprotected?vf-vfanswer--
•vfSun,vfwind,vfandvfrapidvfevaporation
•vfContamination
Whatvfmustvfoccurvfbeforvfavfsamplevfofvfconcretevfcanvfbevftakenvffromvfavfrevolvingvfdrumvf
mixer?vf-vfanswer--•Allvfwatervfandvfadmixturesvfmustvfbevfaddedvftovfthevfmixer.
ANSWERS
Whatvfmustvfoccurvfbeforevfavfsamplevfofvfconcretevfcanvfbevftakenvffromvfavfrevolvingvfdru
mvfmixer?vf-vfanswer--•Allvfwatervfandvfadmixturesvfmustvfbevfaddedvftovfthevfmixer.
Whenvfsamplingvffromvfavfstationaryvforvfrevolvingvfdrumvfmixer,vfwhatvfisvfcollectedvfandvf
whenvfisvfitvftakenvfduringvfdischarge?vf-vfanswer--•vfInvftwovforvfmorevfportionsvfofvfconcrete
•vfAtvfregularlyvfspacedvfintervals
•vfFromvfthevfmiddlevfofvfthevfbatch
Howvfarevfthevfsamplevfportionsvfobtainedvffromvfthevfdischargevfstreamvfofvfavfstationaryvfo
rvfrevolvingvfdrumvfmixer?vf-vfanswer--
•Repeatedlyvfpassvfavfreceptaclevfthroughvfthevfentirevfdischargevfstream
•vfCompletelyvfdivertvfthevfdischargevfstreamvfintovfavfsamplevfcontainer
Describevfthevfprocedurevfforvfcollectingvfavfsamplevffromvfavfpavingvfmixer.vf-vfanswer--
•vfDischargevfthevfcontentsvfofvfthevfpavingvfmixer
•vfObtainvfsamplesvffromvfatvfleastvffivevfdifferentvfportionsvfofvfthevffile
Whatvfisvfthevfminimumvfsizevfforvfavfsamplevfwhenvfstrengthvftestvfspecimensvfarevftovfbevf
moulded?vf-vfanswer--•vf28vfLvf
vf[vf1vfcfvf]
Whatvfisvfthevfmaximumvfallowablevftimevfbetweenvfobtainingvfthevffirstvfandvffinalvfportions
vfofvfthevfcompositevfsample?vf-vfanswer--•vf15vfmin
Whatvfactionvfisvfrequiredvfaftervfthevfindividualvfconcretevfsamplesvfhavevfbeenvftransport
edvftovfthevfplacevfwherevftestsvfarevftovfbevfperformed?vf-vfanswer--
•vfCombinevfandvfremixvfthevfsamplesvfwithvfavfshovel
WhatvfshouldvfbevfdonevfifvfThevfconcretevfcontainsvfaggregatevflargervfthanvfisvfappropriat
evfforvfthevfsizevfofvfthevfmoldsvforvfequipmentvfbeingvfused?vf-vfanswer--•vfWetvfseiving
Startvfthevftestsvfforvfslump,vftemperature,vfandvfairvfcontentvfwithinvfhowvfmanyvfminutesvfa
ftervfobtainingvfthevffinalvfportionvfofvfthevfcompositevfsample?vf-vfanswer--•vf5min
Startvfmouldingvfspecimensvfforvfstrengthvftestsvfwithinvfhowvfmanyvfminutesvfaftervffabrica
tingvfthevfcompositevfsample?vf-vfanswer--•vf15vfmin
Fromvfwhatvfmustvfthevfconcretevfsamplevfbevfprotected?vf-vfanswer--
•vfSun,vfwind,vfandvfrapidvfevaporation
•vfContamination
Whatvfmustvfoccurvfbeforvfavfsamplevfofvfconcretevfcanvfbevftakenvffromvfavfrevolvingvfdrumvf
mixer?vf-vfanswer--•Allvfwatervfandvfadmixturesvfmustvfbevfaddedvftovfthevfmixer.