ACI Written Exam Questions & Answers 2024
Edition. Already Graded A+.
1 cubic foot - ANSThe minimum size for samples to be used for strength test is:
15 minutes - ANSStart molding strength test specimens within _______ after fabricating
the composite sample.
3 inches ( 75MM) - ANSWhen determining the temperature of fresh mixed concrete,
what is the minimum amount of concrete cover in all directions around the sensor of the
temperature measuring device?
4.8% - ANSIf 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 containing concrete with the same
aggregate, what is the correct air content?
5 MInutes - ANSTests for slump and air content must be started within ________ after
obtaining the final portion of the composite sample.
60 to 80 degrees f (16 to 27 degrees C) - ANSFor normal strength concretes, what
temperature range must be maintained for test cylinders during initial curing?
Determination that at least 8 hours has elapsed since final set. - ANSPreparation of
specimens for transport includes:
Disregard the test and retest on another portion of the sample. - ANSWhile the
technician is checking the slump of the concrete, there is a decided falling away or
shearing off of concrete from one side of the sample. What should the technician do?
False - ANSIs the following statement true or false? After strike off of the measure used
to determine density, a small quantity of concrete may be added to correct a deficiency.
False - ANSIs the following statement true or false? It is acceptable to fabricate a test
specimen from the same concrete used for the air contest test.
false - ANSIs the following statement true or false? The sides of the slump mold should
be lightly tapped to consolidate the concrete in the mold.
False - ANSIs the following statement true or false? When concrete contains large
aggregate, the testing technician should wet-sieved the sample before making density
(unit weight) tests for use in yield computations.
False. Relatively dense - ANSThe method of determining air content of concrete
containing lightweight aggregate is the pressure method
Edition. Already Graded A+.
1 cubic foot - ANSThe minimum size for samples to be used for strength test is:
15 minutes - ANSStart molding strength test specimens within _______ after fabricating
the composite sample.
3 inches ( 75MM) - ANSWhen determining the temperature of fresh mixed concrete,
what is the minimum amount of concrete cover in all directions around the sensor of the
temperature measuring device?
4.8% - ANSIf 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 containing concrete with the same
aggregate, what is the correct air content?
5 MInutes - ANSTests for slump and air content must be started within ________ after
obtaining the final portion of the composite sample.
60 to 80 degrees f (16 to 27 degrees C) - ANSFor normal strength concretes, what
temperature range must be maintained for test cylinders during initial curing?
Determination that at least 8 hours has elapsed since final set. - ANSPreparation of
specimens for transport includes:
Disregard the test and retest on another portion of the sample. - ANSWhile the
technician is checking the slump of the concrete, there is a decided falling away or
shearing off of concrete from one side of the sample. What should the technician do?
False - ANSIs the following statement true or false? After strike off of the measure used
to determine density, a small quantity of concrete may be added to correct a deficiency.
False - ANSIs the following statement true or false? It is acceptable to fabricate a test
specimen from the same concrete used for the air contest test.
false - ANSIs the following statement true or false? The sides of the slump mold should
be lightly tapped to consolidate the concrete in the mold.
False - ANSIs the following statement true or false? When concrete contains large
aggregate, the testing technician should wet-sieved the sample before making density
(unit weight) tests for use in yield computations.
False. Relatively dense - ANSThe method of determining air content of concrete
containing lightweight aggregate is the pressure method
