ACI Certification Practice Exam 2026
Questions and Answers
For 4x8 cylinders, how many layers and rod strokes to properly consolidate the
concrete? - Answer -2 layers, 25 strokes
For 6x12 cylinders, how many layers and rod strokes to properly consolidate the
concrete? - 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 - 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" - Answer -True
While rodding the top layer and the concrete becomes low, additional concrete
must be added before the 25th stroke - Answer -True
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, A tamping rod, flow, or trowel can be used to produce a smooth flat level surface
on top of the cylinders - 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 - 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? -
Answer -Field cure
Which three tests must always be performed when making test specimens? -
Answer -Temperature, slump, air content
Concrete should cover________ inches around the temperature sensor? - Answer -
3
When inserting the sensor into the sample, gently press concrete around the sensor.
- Answer -True
The temperature reading must be complete between _______ and ______ minutes -
Answer -2 and 5
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Questions and Answers
For 4x8 cylinders, how many layers and rod strokes to properly consolidate the
concrete? - Answer -2 layers, 25 strokes
For 6x12 cylinders, how many layers and rod strokes to properly consolidate the
concrete? - 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 - 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" - Answer -True
While rodding the top layer and the concrete becomes low, additional concrete
must be added before the 25th stroke - Answer -True
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, A tamping rod, flow, or trowel can be used to produce a smooth flat level surface
on top of the cylinders - 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 - 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? -
Answer -Field cure
Which three tests must always be performed when making test specimens? -
Answer -Temperature, slump, air content
Concrete should cover________ inches around the temperature sensor? - Answer -
3
When inserting the sensor into the sample, gently press concrete around the sensor.
- Answer -True
The temperature reading must be complete between _______ and ______ minutes -
Answer -2 and 5
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
