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ACI written exam questions (2).
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ACI written exam questions (2).
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ACI written exam questions1 cubic foot - ANS-The minimum size for samples to
be used for strength test is:
15 minutes - ANS-Start molding strength test
specimens within _______ after fabricating the
composite sample.
3 inches ( 75MM) - ANS-When 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% - ANS-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?
5 MInutes - ANS-Tests 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) - ANS-For
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. - ANS-Preparation of specimens for
transport includes:
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