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ACI TEST QUESTIONS AND CORRECT VERIFIED ANSWERS

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ACI TEST QUESTIONS AND CORRECT VERIFIED ANSWERS

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ACI TEST QUESTIONS AND CORRECT
VERIFIED ANSWERS
TheA2totalA2timeA2allowedA2betweenA2obtainingA2theA2firstA2andA2finalA2portionsA2ofA2aA2co
mpositeA2sampleA2isA2-A2Ans--15A2minutes

WhenA2itA2isA2necessaryA2toA2wetA2sieveA2theA2concreteA2sample,A2wetA2sievingA2shouldA2
beA2performedA2afterA2theA2individualA2samplesA2areA2remixedA2intoA2aA2compositeA2samp
leA2(TA2orA2F)A2-A2Ans--F

TestsA2forA2slump,A2temperature,A2andA2airA2contentA2mustA2beginA2withinA2______A2minu
tesA2afterA2obtainingA2theA2compositeA2sampleA2-A2Ans--5A2minutes

BeginA2moldingA2testA2specimensA2withinA2______A2minutesA2afterA2obtainingA2theA2comp
ositeA2sampleA2-A2Ans--15A2minutes

TheA2concreteA2samplesA2shouldA2beA2protectedA2fromA2-A2Ans--
theA2sun,A2wind,A2andA2otherA2sourcesA2ofA2rapidA2evaporation,A2fromA2contamination

WhenA2testA2specimensA2areA2toA2beA2molded,A2theA2minimumA2sizeA2ofA2sampleA2obtain
edA2isA2-A2Ans--28A2LA2(1A2ft^3)

TheA2primaryA2objectiveA2ofA2theA2samplingA2processA2isA2toA2obtainA2aA2representativeA2s
ampleA2(TA2orA2F)A2-A2Ans--T

WhenA2samplingA2fromA2aA2revolvingA2drumA2truckA2mixerA2collectA2concreteA2fromA2____
__A2portionsA2ofA2theA2batchA2-A2Ans--2A2orA2more

WetA2sievingA2isA2performedA2-A2Ans--
whenA2theA2concreteA2containsA2aggregatesA2largerA2thanA2appropriateA2forA2aA2test

WhenA2samplingA2fromA2aA2pavingA2mixerA2itA2isA2notA2acceptableA2toA2placeA23A2smallA2c
ontainersA2onA2theA2subA2gradeA2inA2orderA2toA2obtainA2theA2requiredA2samplesA2ofA2concr
eteA2(TA2orA2F)A2-A2Ans--F

TEMPERATUREA2-A2Ans--

itA2mayA2requireA2upA2toA2___A2minA2beforeA2theA2tempA2stabilizesA2whenA2theA2NMSA2ofA2
theA2coarseA2aggA2isA2greaterA2thanA2___A2-A2Ans--20min.,A23in.

TheA2containerA2forA2theA2concreteA2shallA2beA2largeA2enoughA2toA2provideA2atA2leastA2___
A2inches,A2orA2_____A2ofA2coarseA2agg,A2ofA2concreteA2inA2allA2directionsA2aroundA2theA2T
MDA2-A2Ans--3in.,A23A2xA2NMS

, TheA2temperatureA2measuringA2deviceA2shallA2haveA2theA2capabilityA2ofA2measuringA2theA
2temperatureA2ofA2theA2freshlyA2mixedA2concreteA2toA2±A2______A2oFA2accuracyA2andA2ha
veA2a
rangeA2ofA2______A2toA2______A2oF.A2-A2Ans--1,30to120

AA2compositeA2sampleA2ofA2concreteA2isA2notA2requiredA2evenA2ifA2theA2onlyA2purposeA2for
A2obtainingA2theA2sampleA2isA2toA2determineA2temperature.A2TA2orA2FA2-A2Ans--T


TheA2TemperatureA2MeasuringA2DeviceA2usedA2forA2determiningA2concreteA2temperature
A2mustA2beA2calibratedA2______A2orA2wheneverA2thereA2isA2aA2questionA2ofA2accuracy.A2-
A2Ans--annually


TheA2temperatureA2ofA2freshlyA2mixedA2concreteA2canA2beA2measuredA2inA2-A2Ans--
allA2ofA2theA2above

SubmergeA2theA2sensingA2portionA2ofA2theA2thermometerA2atA2leastA2______A2inchesA2int
oA2theA2concreteA2-A2Ans--3

GentlyA2pressA2concreteA2aroundA2theA2thermometerA2suchA2thatA2the_______A2doesA2no
t
affectA2theA2reading.A2-A2Ans--ambientA2airA2temp

TheA2thermometerA2mustA2remainA2inA2theA2concreteA2duringA2theA2measurementA2forA2aA
2minimumA2ofA2______A2minutes.A2InA2addition,A2theA2temperatureA2measurementA2mustA
2beA2completedA2withinA2_______A2minutesA2afterA2obtainingA2theA2sample.A2-A2Ans--2,A25


TheA2temperatureA2ofA2freshlyA2mixedA2concreteA2isA2measuredA2andA2recordedA2toA2theA2
nearestA2_____A2-A2Ans--1A2degree

SLUMPA2TESTA2-A2Ans--

****TheA2slumpA2testA2doesA2notA2provideA2anA2indicationA2ofA2theA2waterA2contentA2ofA2aA
2concreteA2mixture.A2-A2Ans--F


AA2slumpA2moldA2canA2beA2fabricatedA2fromA2bothA2plasticA2andA2metal.A2-A2Ans--T

****TheA2lengthA2ofA2theA2tampingA2forA2theA2slumpA2testA2shallA2beA2approximatelyA2-
A2Ans--


TheA2slumpA2testA2isA2applicableA2toA2concreteA2havingA2aA2coarseA2aggregateA2upA2toA2_
______A2inchA2inA2size.A2-A2Ans--1.5A2inches

TheA2heightA2ofA2theA2slumpA2coneA2isA2-A2Ans--12A2in

6.A2TheA2exteriorA2ofA2theA2slumpA2coneA2isA2tappedA210A2toA215A2timesA2afterA2roddingA2e
achA2layer.A2-A2Ans--F

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