ACI CERTIFICATION PRACTICE EXAM QUESTIONS
WITH CORRECT ANSWERS 2025/2026
For 4x8 cylinders, how many layers and rod strokes to properly consolidate the concrete? -
CORRECT ANSWER -2 layers, 25 strokes
For 6x12 cylinders, how many layers and rod strokes to properly consolidate the concrete? -
CORRECT ANSWER -3 layers, 25 rod strokes
After rodding each layer, the sides of the molds should be tapped 10-15 times with a tapping
rod? T/F - CORRECT ANSWER -False
It should be done with a rubber mallet
When rodding the second and/or third layers, the rod must go through the current ;layer and
penetrate the previous layer approximately 1" - CORRECT ANSWER -True
While rodding the top layer and the concrete becomes low, additional concrete must be added
before the 25th stroke - CORRECT ANSWER -True
A tamping rod, flow, or trowel can be used to produce a smooth flat level surface on top of the
cylinders - CORRECT ANSWER -Tamping rod, flow, trowel, all the above
All of the above is correct
When a strength specimen is used for acceptance testing, quality control testing, or trial
batching a mix design, which type of curing method should be used - CORRECT ANSWER -
Standard lab cure
, when a strength specimen is used to determine when a structure can be put in the service or
when shoring can be removed, which type of curing should be used? - CORRECT ANSWER -Field
cure
Whichwthreewtestswmustwalwayswbewperformedwwhenwmakingwtestwspecimens?w-
wCORRECTwANSWERw-Temperature,wslump,wairwcontent
Concretewshouldwcover________wincheswaroundwthewtemperaturewsensor?w-wCORRECTwANSWERw-
3
Whenwinsertingwthewsensorwintowthewsample,wgentlywpresswconcretewaroundwthewsensor.w-
wCORRECTwANSWERw-True
Thewtemperaturewreadingwmustwbewcompletewbetweenw_______wandw______wminutesw-
wCORRECTwANSWERw-2wandw5
Readwthewtemperaturewmeasurementwtowthewnearestw______wFahrenheitw-wCORRECTwANSWERw-
1wdegree
Thewtemperaturewsensorwshouldwbewremovedwwhenwreadingwit?w-wCORRECTwANSWERw-False
Thewtemperaturewmeasuringwdevicewshallwbewcalibratedw_________orwwheneverwtherewiswawquest
ionwof_____________w-wCORRECTwANSWERw--Annually
-Correctnessworwaccuracy
Thewtemperaturewdevicewshouldwbewaccuratewtowthewnearest_______wfahrenheitwandwhavewawran
gewofw_____farenhitewtow_______wfahrenheit.w-wCORRECTwANSWERw-1
30
120
WITH CORRECT ANSWERS 2025/2026
For 4x8 cylinders, how many layers and rod strokes to properly consolidate the concrete? -
CORRECT ANSWER -2 layers, 25 strokes
For 6x12 cylinders, how many layers and rod strokes to properly consolidate the concrete? -
CORRECT ANSWER -3 layers, 25 rod strokes
After rodding each layer, the sides of the molds should be tapped 10-15 times with a tapping
rod? T/F - CORRECT ANSWER -False
It should be done with a rubber mallet
When rodding the second and/or third layers, the rod must go through the current ;layer and
penetrate the previous layer approximately 1" - CORRECT ANSWER -True
While rodding the top layer and the concrete becomes low, additional concrete must be added
before the 25th stroke - CORRECT ANSWER -True
A tamping rod, flow, or trowel can be used to produce a smooth flat level surface on top of the
cylinders - CORRECT ANSWER -Tamping rod, flow, trowel, all the above
All of the above is correct
When a strength specimen is used for acceptance testing, quality control testing, or trial
batching a mix design, which type of curing method should be used - CORRECT ANSWER -
Standard lab cure
, when a strength specimen is used to determine when a structure can be put in the service or
when shoring can be removed, which type of curing should be used? - CORRECT ANSWER -Field
cure
Whichwthreewtestswmustwalwayswbewperformedwwhenwmakingwtestwspecimens?w-
wCORRECTwANSWERw-Temperature,wslump,wairwcontent
Concretewshouldwcover________wincheswaroundwthewtemperaturewsensor?w-wCORRECTwANSWERw-
3
Whenwinsertingwthewsensorwintowthewsample,wgentlywpresswconcretewaroundwthewsensor.w-
wCORRECTwANSWERw-True
Thewtemperaturewreadingwmustwbewcompletewbetweenw_______wandw______wminutesw-
wCORRECTwANSWERw-2wandw5
Readwthewtemperaturewmeasurementwtowthewnearestw______wFahrenheitw-wCORRECTwANSWERw-
1wdegree
Thewtemperaturewsensorwshouldwbewremovedwwhenwreadingwit?w-wCORRECTwANSWERw-False
Thewtemperaturewmeasuringwdevicewshallwbewcalibratedw_________orwwheneverwtherewiswawquest
ionwof_____________w-wCORRECTwANSWERw--Annually
-Correctnessworwaccuracy
Thewtemperaturewdevicewshouldwbewaccuratewtowthewnearest_______wfahrenheitwandwhavewawran
gewofw_____farenhitewtow_______wfahrenheit.w-wCORRECTwANSWERw-1
30
120
