ACI WRITTEN EXAM QUESTIONS WITH
CORRECT ANSWERS 2025
The method of determining air content of concrete containing lightweight aggregate is the pressure me
thod - CORRECT ANSWER -False. Relatively dense
Is the following statement true or false? When making a test cylinder from concrete being used in cons
truction, the field technician must also measure the slump of the concrete. - CORRECT ANSWER -True
While the technician is checking the slump of the concrete, there is a decided falling away or shearing o
ff of concrete from one side of the sample. What should the technician do? - CORRECT ANSWER -
Disregard the test and retest on another portion of the sample.
Preparation of specimens for transport includes: - CORRECT ANSWER -
Determination that at least 8 hours has elapsed since final set.
If the aggregate correction factor for a given source of fine and coarse aggregate is found to be 0.2% in
a pressure air meter, and an air content value of 5.0% is read on the gauge of the same air meter contai
ning concrete with the same aggregate, what is the correct air content? - CORRECT ANSWER -4.8%
Strength test specimens transported from the field to the testing laboratory must be: -
CORRECT ANSWER -Protected from jarring, moisture loss, and freezing
Tests for slump and air content must be started within after obtainingAthe final portion of the
composite sample. - CORRECT ANSWER -5 MInutes
The minimum size for samples to be used for strength test is: - CORRECT ANSWER -1 cubic foot
Is the following statement true or false? After strike off of the measure used to determine density, a sm
all quantity of concrete may be added to correct a deficiency. - CORRECT ANSWER -False
For normal strength concretes, what temperature range must be maintained for test cylinders during ini
tial curing? - CORRECT ANSWER -60 to 80 degrees f (16 to 27 degrees C)
CORRECT ANSWERS 2025
The method of determining air content of concrete containing lightweight aggregate is the pressure me
thod - CORRECT ANSWER -False. Relatively dense
Is the following statement true or false? When making a test cylinder from concrete being used in cons
truction, the field technician must also measure the slump of the concrete. - CORRECT ANSWER -True
While the technician is checking the slump of the concrete, there is a decided falling away or shearing o
ff of concrete from one side of the sample. What should the technician do? - CORRECT ANSWER -
Disregard the test and retest on another portion of the sample.
Preparation of specimens for transport includes: - CORRECT ANSWER -
Determination that at least 8 hours has elapsed since final set.
If the aggregate correction factor for a given source of fine and coarse aggregate is found to be 0.2% in
a pressure air meter, and an air content value of 5.0% is read on the gauge of the same air meter contai
ning concrete with the same aggregate, what is the correct air content? - CORRECT ANSWER -4.8%
Strength test specimens transported from the field to the testing laboratory must be: -
CORRECT ANSWER -Protected from jarring, moisture loss, and freezing
Tests for slump and air content must be started within after obtainingAthe final portion of the
composite sample. - CORRECT ANSWER -5 MInutes
The minimum size for samples to be used for strength test is: - CORRECT ANSWER -1 cubic foot
Is the following statement true or false? After strike off of the measure used to determine density, a sm
all quantity of concrete may be added to correct a deficiency. - CORRECT ANSWER -False
For normal strength concretes, what temperature range must be maintained for test cylinders during ini
tial curing? - CORRECT ANSWER -60 to 80 degrees f (16 to 27 degrees C)
