ACI written exam questions with
complete solutions3
False. Relatively dense - ANSWERS-The method of determining air content of concrete
containing lightweight aggregate is the pressure method
True - ANSWERS-Is the following statement true or false? When making a test cylinder from
concrete being used in construction, the field technician must also measure the slump of the
concrete.
Disregard the test and retest on 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 has elapsed since final set. - ANSWERS-Preparation of
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 gauge of the same air meter containing concrete with the same aggregate, what is the
correct air content?
Protected from jarring, moisture loss, and freezing - ANSWERS-Strength test specimens
transported from the field to the testing laboratory must be:
5 MInutes - ANSWERS-Tests for slump and air content must be started within ________ after
obtaining the final portion of the composite sample.
complete solutions3
False. Relatively dense - ANSWERS-The method of determining air content of concrete
containing lightweight aggregate is the pressure method
True - ANSWERS-Is the following statement true or false? When making a test cylinder from
concrete being used in construction, the field technician must also measure the slump of the
concrete.
Disregard the test and retest on 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 has elapsed since final set. - ANSWERS-Preparation of
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 gauge of the same air meter containing concrete with the same aggregate, what is the
correct air content?
Protected from jarring, moisture loss, and freezing - ANSWERS-Strength test specimens
transported from the field to the testing laboratory must be:
5 MInutes - ANSWERS-Tests for slump and air content must be started within ________ after
obtaining the final portion of the composite sample.
