2026 ACI EXAM QUESTIONS WITH CORRECT ANSWERS

2026 ACI EXAM QUESTIONS WITH
CORRECT ANSWERS
The end of the temperature measuring device must be submerged a minimum of ______? -
CORRECT ANSWER -3"



What is the required capability range on the temperature measuring device? - CORRECT ANSWER -
30 degrees F - 120 degrees F



The temperature measuring device shall be verified __________, or whenever there is a question of __
_______. - CORRECT ANSWER -annually, accuracy



The temperature of concrete may be measured in a wheelbarrow. True or False? - CORRECT ANSWER -
TRUE



The temperature of concrete may be measured in a wall form. True or False? - CORRECT ANSWER -
TRUE



A composite sample of concrete is required even if the only purpose for obtaining the sample is to dete
rmine temperature. True or False? - CORRECT ANSWER -FALSE



What must be done to the sample container prior to sampling concrete? - CORRECT ANSWER -
Dampen the surface with water.



What must be done to the concrete surrounding the temperature measuring device aſter the device is s
ubmerged in the fresh concrete? - CORRECT ANSWER -
Gently push the surrounding concrete back around the temperature measuring device near the surface.



How long must the temperature measuring device remain in the freshly mixed concrete? -
CORRECT ANSWER -2 - 5 minutes.



Aſter the temperature of concrete is read, what is then required. - CORRECT ANSWER -
Report the temperature of the concrete to the nearest 1.0 degree F.

,The temperature of the concrete is reported to the nearest ________C. _________F. -
CORRECT ANSWER -0.5 degree C, 1.0 degree F



According to ASTM C1064 what is one reason to take the temperature of concrete? -
CORRECT ANSWER -Verify conformance to a specified requirement.



A maximum temperature of freshly mixed concrete is specified in Test Method C1064. True or False? -
CORRECT ANSWER -FALSE



The sample of concrete used for temperature determination must be rodded 25 times. True or False? -
CORRECT ANSWER -FALSE



What is the reason for pressing concrete around the temperature measuring device? -
CORRECT ANSWER -
So that the ambient air temperature does not influence the measured temperature.



You should remove the temperature measuring device before reporting the reading. TRUE or FALSE? -
CORRECT ANSWER -FALSE



What is the ASTM for measuring temperature on freshly sampled concrete? - CORRECT ANSWER -
C1064



What is the ASTM for Sampling FreshlyxMixedxConcretex-xCORRECTxANSWERx-C172



Whatxisxthexmaximumxelapsedxtimexforxobtainingxaxcompositex(twoxorxmorexpart)xsamplexofxconcrete
?x -
CORRECTxANSWERx-15xMinutes

Whatxshouldxbexdonextoxthexconcretexsamplexaſterxtransportingxitxtoxthextestingxsite?
x-
CORRECTxANSWERx-Remixxitxwithxaxshovelxtoxensurexuniformity.

Withinxhowxmanyxminutesxshouldxtestsxbexstartedxforxslump,xairxcontent,xandxtemperaturexaſterxobtai
ni
ngxaxconcretexsample?x-xCORRECTxANSWERx-5xminutes

,x




Testx cylindersxforxstrengthxshouldxbexmoldedxwithinx___xminutesxofxtakingxaxconcretexsample.
x-
CORRECTxANSWERx-15

Thexconcretexsamplexmustxbexprotectedxfromx_____,x_____,xsourcesxofxrapidx_______________,xandx
fr
omx______________________.x-xCORRECTxANSWERx-Sun,xWind,xEvaporation,xContamination.

Whatxisxthexminimumxconcretexsamplexsizextoxbextakenxforxtesting?x-
x2CORRECT
8xLitersx/xxANSWER x- xCubicxFt)
1xſt3x(One



Whenxsamplingxfromxaxstationaryxmixer,xhowxmanyxportionsxshouldxbextaken?x-
xCORRECTxANSWERx-
Twoxorxmore

Whenxsamplingxfromxaxstationaryxmixer,xfromxwhichxportionxofxthexbatchxshouldxthexsamplesxbextake
n?
- CORRECTxANSWERx-Thexmiddlexportion.



Whenxsamplingxfromxaxstationaryxmixer,xwhichxtwoxcollectionxmethodsxarexacceptablexforxobtainingxa
xs
ample?x-xCORRECTxANSWERx-1)xDivertingxthexentirexflow
2)xPassingxaxreceptaclexentirelyxthroughxthexdischargexstream



WhenxsamplingxfromxaxPavingxMixer,xhowxmanyxsamplesxarexrequired?x-
xCORRECTxANSWERx-
5xsamplesxminimumx(combinedxintoxonexcompositexsample)

WhenxsamplingxfromxaxPavingxMixer,xhowxshouldxthexsample/sxbextaken?x-
xCORRECTxANSWERx-
Oncexdischargexisxcompletexintoxaxpile.

WhatxshouldxbexavoidedxwhenxtakingxsamplesxfromxaxPavingxMixer?x-
xCORRECTxANSWERx-
ContaminationxwithxthexSub-Gradex(ground)

WhenxsamplingxfromxaxRevolvingxDrumxMixerxorxAgitatorxaxminimumxofxhowxmanyxportionsxshouldxb
ex t
aken?x-xCORRECTxANSWERx-Twoxorxmorex(combinedxintoxonexcompositexsample)