ACI CONCRETE FIELD TESTING TECHNICIAN- GRADE I QUESTIONS AND CORRECT VERIFIED ANSWERS

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ACI CONCRETE FIELD TESTING TECHNICIAN- GRADE I QUESTIONS AND CORRECT VERIFIED ANSWERS

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2025/2026

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ACI CONCRETE FIELD TESTING TECHNICIAN- GRADE I QUESTIONS AND CORRECT VERIFIED ANSWERS

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ACI CONCRETE FIELD TESTING
TECHNICIAN- GRADE I QUESTIONS AND
CORRECT VERIFIED ANSWERS
TheA2sensorA2ofA2theA2temperatureA2measuringA2deviceA2shallA2beA2submergedA2aA2mini
mumA2ofA2_____A2in.A2[_____mm]A2intoA2theA2freshlyA2mixedA2concrete.A2-A2Ans--
3A2in.A2[75A2mm]

TheA2temperatureA2measuringA2deviceA2shallA2haveA2aA2capacityA2ofA2measuringA2temper
atureA2ofA2freshlyA2mixedA2concreteA2toA2+-A2_____A2degreesA2FA2[+-
A2_____A2C]A2throughoutA2aA2rangeA2ofA2_____.A2-A2Ans--
1A2degreeA2FA2[0.5A2C],A230A2degreesA2FA2toA2120A2FA2[0A2CA2toA250A2C]

TheA2temperatureA2measuringA2deviceA2shallA2beA2calibratedA2_____,A2orA2wheneverA2the
reA2isA2aA2questionA2ofA2_____.A2-A2Ans--Annually,A2accuracy

TheA2temperatureA2ofA2concreteA2mayA2beA2measuredA2inA2aA2wheelbarrow.A2TrueA2orA2F
alse?A2-A2Ans--True

TheA2temperatureA2ofA2concreteA2mayA2beA2measuredA2inA2aA2wallA2form.A2TrueA2ofA2Fals
eA2-A2Ans--True

AA2compositeA2sampleA2ofA2concreteA2isA2requiredA2evenA2ifA2theA2onlyA2purposeA2forA2obt
ainingA2theA2sampleA2isA2toA2determineA2temperature.A2TrueA2ofA2False?A2-A2Ans--False

WhatA2mustA2beA2doneA2toA2theA2sampleA2containerA2priorA2toA2samplingA2theA2concrete?
A2-A2Ans--DampenA2(withA2water)

WhatA2mustA2beA2doneA2toA2theA2concreteA2surroundingA2theA2temperatureA2measuringA2
deviceA2afterA2theA2deviceA2isA2submergedA2inA2theA2freshA2concrete.A2-A2Ans--
GentlyA2pressA2theA2concreteA2aroundA2theA2temperatureA2measuringA2deviceA2atA2theA2s
urfaceA2ofA2theA2concrete

HowA2longA2mustA2theA2temperatureA2measuringA2deviceA2remainA2inA2theA2freshlyA2mixe
dA2concrete?A2-A2Ans--AtA2leastA22A2minutesA2butA2notA2moreA2thanA25A2minutes

AfterA2theA2temperatureA2ofA2theA2concreteA2isA2read,A2whatA2isA2required?A2-A2Ans--
ReportingA2ofA2temperature

TheA2temperatureA2ofA2concreteA2isA2reportedA2toA2theA2nearestA2_____A2degreesA2FA2[__
___A2C]A2-A2Ans--1A2degreeA2FA2[0.5A2C]

, AccordingA2toA2ASTMA2C1064,A2whatA2isA2oneA2reasonA2toA2takeA2theA2temperatureA2ofA2c
oncrete?A2-A2Ans--
VerifyA2conformanceA2toA2aA2specifiedA2requirementA2forA2temperatureA2ofA2concrete

AA2maximumA2temperatureA2ofA2freshlyA2mixedA2concreteA2isA2specifiedA2inA2ASTMA2C10
64.A2TrueA2ofA2False?A2-A2Ans--False

TheA2sampleA2ofA2concreteA2usedA2forA2temperatureA2determinationA2mustA2beA2roddedA2
25A2times.A2TrueA2orA2False?A2-A2Ans--False

SamplingA2byA2thisA2methodA2isA2requiredA2whenA2testsA2areA2toA2beA2madeA2toA2determin
eA2_____A2withA2specificationA2requirements.A2-A2Ans--Compliance

ThisA2methodA2coversA2samplingA2fromA2fourA2typesA2ofA2mixturesA2whichA2areA2_____,A2
_____,A2_____,A2andA2_____.A2-A2Ans--
StationaryA2mixers,A2pavingA2mixers,A2revolvingA2drumA2mixers,A2andA2openA2topA2mixers

TheA2maximumA2allowableA2timeA2betweenA2obtainingA2theA2firstA2andA2finalA2portionsA2of
A2aA2compositeA2sampleA2isA2_____A2minutes.A2-A2Ans--15

PortionsA2ofA2aA2compositeA2sampleA2shallA2beA2thoroughlyA2remixedA2bforeA2beginningA2t
estsA2onA2theA2sample.A2TrueA2ofA2False?A2-A2Ans--True

TheA2maximumA2elapsedA2timeA2allowedA2betweenA2obtainingA2theA2finalA2portionA2ofA2th
eA2compositeA2sampleA2andA2beginningA2theA2testsA2forA2slump,A2temperature,A2andA2airA2
contentA2isA2_____A2minutes.A2-A2Ans--5

TheA2moldingA2ofA2strengthA2testA2specimensA2shallA2beginA2withinA2_____A2minutesA2afte
rA2fabricatingA2theA2compositeA2sample.A2-A2Ans--15

TheA2concreteA2sampleA2mustA2beA2protectedA2fromA2contaminationA2andA2_____.A2-
A2Ans--RapidA2evaporation

TheA2minimumA2sizeA2sampleA2forA2makingA2strengthA2testA2specimensA2isA2_____.A2-
A2Ans--28A2LA2(1ft^3)

WhenA2samplingA2fromA2aA2stationaryA2mixer,A2theA2batchA2mustA2beA2sampledA2atA2____
_A2orA2moreA2regularlyA2spacedA2intervalsA2duringA2dischargeA2ofA2theA2middleA2portionA2o
fA2theA2batchA2-A2Ans--2

TheA2compositeA2sampleA2forA2aA2pavingA2mixerA2mustA2representA2aA2minimumA2ofA2___
__A2differentA2portionsA2ofA2theA2batchA2ofA2concreteA2takenA2fromA2theA2pileA2afterA2disch
arge.A2-A2Ans--5

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