Concrete deputy inspector verified guide
As per ASTM C31 6,000 - PSI concrete test specimens cast on site may be temporarily stored under
which of the following conditions? ️Temperature rand between 68 and 78 defreesF
When the specifications for slump are not written as "not to exceed" requ...
Concrete deputy inspector verified guide
As per ASTM C31 6,000 - PSI concrete test specimens cast on site may be temporarily stored under
which of the following conditions? ✔️Temperature rand between 68 and 78 defreesF
When the specifications for slump are not written as "not to exceed" requirement, the tolerance
permitted for a specified slump of 2in is plus or minus ✔️1-1/2
The air content of air entrained, when sampled from a truck mixer at the point of discharge, shall be
within a tolerance of (plus or minus) ______ percent of the specified air content. ✔️1.5
Per ASTM C 31, Specimens shall not be transported from field to lab before how many hours ✔️8 hours
The slump test is used to measure the ________ of concrete. ✔️Consistency
Field- cast test specimens not transported to the testing lab prior to the age ___ hours shall be
demolded prior to transportation ✔️8
Samples of concrete are being taken from revolving drum truck, for making test specimens to determine
compliance with specification requirements. ✔️At 2 or more spaced intervals during discharge
Before concrete is placed, reinforcing bars shall be free from... ✔️Mud, oil or other nonmetallic
coatings.
In a freeze-thaw environment, durability of hardened concrete is increased by the use ✔️Calcium
chloride
When field made concrete test cylinders are to determine compliance with specification requirements,
the maximum temperature for initial storing in the field after molding is_____ degrees ✔️80
According to the concrete Manuel, the required final curing temperature in the lab for test cylinders
prepared as a basis for acceptance of concrete is ____ degrees ✔️73.4 +/- 3.5
, A strength test result shall be made from the same sample of concrete and tested at the same time and
shall be average of the strength of at least (2):6x12 (3): 4x8 ✔️(2):6x12 (3): 4x8 cylinders
A concrete sample which is used for making concrete strength test specimens in the field shall be at
least ✔️1 cu. Ft.
According to ASTM C 94 which of the following concrete ingredients can be measured (batches) by
weight or volume ✔️Water
For the strength level of an individual class of concrete to be considered satisfactory, one of the two
conditions to be met is that no individual strength test falls below the specified strength by more than
____ psi? ✔️500 psi
The recommended to total air content for moderate exposure frost- resistant concrete utilizing 3/4 in
aggregate is _____ percent ✔️.5%
During transportation the cylinders shall be ✔️Cushioned
According to the building code requirements for structural concrete (ACI 318), when investigating low
strength concrete by core testing, the concrete is acceptable in the average of three cores is equal to
minimum of 75 percent of the required strength. ✔️85,75
The type of steel designation "W" on a concrete reinforcement bar indicates that the bar was
manufactured to which ASTM standard? ✔️A706
Plain reinforcement shall not be used for? ✔️Spiral reinforcement
When concrete is not cast against earth, the minimum concrete cover for bundled bars need to be
greater than ___ in ✔️2in
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