ACI CERTIFICATION PRACTICE EXAM
QUESTIONS WITH CORRECT ANSWERS 2025
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 t
he 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 cylinder
s - 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 sho
ring can be removed, which type of curing should be used? - CORRECT ANSWER -Field cure
Which three tests must always be performed when making test specimens? - CORRECT ANSWER -
Temperature, slump, air content
QUESTIONS WITH CORRECT ANSWERS 2025
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 t
he 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 cylinder
s - 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 sho
ring can be removed, which type of curing should be used? - CORRECT ANSWER -Field cure
Which three tests must always be performed when making test specimens? - CORRECT ANSWER -
Temperature, slump, air content
