aci exam practice questions with
complete solutions3
60-80*F - ANSWERS-For normal strength concretes, what temperature range must be
maintained for test cylinders during initial curing?
5 minutes - ANSWERS-Tests for the slump and air content must be started within ____ after
obtaining the final portion of the composite sample.
Disregard the test and retest another portion of the sample. - ANSWERS-While 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?
Determination that at least 8 hours have elapsed since final set. - ANSWERS-Preparation of the
specimens for transport includes.
4.8% - ANSWERS-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 gage of the same air meter containing concrete with the same aggregate, what is the
correct air content?
Protected from jarring, moisture loss, freezing - ANSWERS-Strength test specimens transported
from the field to the testing laboratory must be.
28L (1ft3) - ANSWERS-The minimum size for samples to be used for strength tests is.
fasle - ANSWERS-After striking off of the measure used to determine density, a small quantity of
concrete may be added to correct the deficiency.
complete solutions3
60-80*F - ANSWERS-For normal strength concretes, what temperature range must be
maintained for test cylinders during initial curing?
5 minutes - ANSWERS-Tests for the slump and air content must be started within ____ after
obtaining the final portion of the composite sample.
Disregard the test and retest another portion of the sample. - ANSWERS-While 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?
Determination that at least 8 hours have elapsed since final set. - ANSWERS-Preparation of the
specimens for transport includes.
4.8% - ANSWERS-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 gage of the same air meter containing concrete with the same aggregate, what is the
correct air content?
Protected from jarring, moisture loss, freezing - ANSWERS-Strength test specimens transported
from the field to the testing laboratory must be.
28L (1ft3) - ANSWERS-The minimum size for samples to be used for strength tests is.
fasle - ANSWERS-After striking off of the measure used to determine density, a small quantity of
concrete may be added to correct the deficiency.
