ACI Concrete Field-Testing Technician Grade
I Certification Actual Exam V2 (Latest
Update ) Questions & Answers |
Grade A | 100% Correct
The standard practice describes the and required to obtain a representative
sample of fresh concrete and to assess its tractability to the structure it represents.
procedures, location and sample size
The procedures used in sampling shall include the use of every precaution that will assist in
obtaining samples that are truly representative of the and of the concrete.
nature and conditions
Intermittent scooping of the sample in shovelfuls or bucketfuls into a wheelbarrow or tray as the
concrete continues to flow down the delivery chute is an acceptable technique?
False
,The concrete sample must be protected at all times from sun, wind, and
rapid evaporation, contaminants
the minimum size sample for making three 100mm diameter strength test cylinder specimens is
20l for 100x200mm
The grab sample form a mixer must be obtained between the % and %points of the
discharge(except when sampling prior to the addition of a super plasticizer.)
10, 90
When the concrete contains aggregate whose nominal size is larger than that permitted for a
particular test method, the sample of concrete must be before making the test(except for
Density tests)
Wet Sieved(over the appropriate sieve size)
, When sampling for uniformity of mixed concrete grab samples shall be obtained from
widely separated portions of the batch during discharge
Three
The temperature of the concrete must be determined within minutes of obtaining the grab
sample.
5 minutes
Air content (pressure method) measurement and slump must both be completed within
minutes after the sample has been transported and remixed.
10 minutes
Moulding of concrete strength cylinders or flexural beams must be completed within
minutes after the sample has been transported and remixed.
20 minutes
I Certification Actual Exam V2 (Latest
Update ) Questions & Answers |
Grade A | 100% Correct
The standard practice describes the and required to obtain a representative
sample of fresh concrete and to assess its tractability to the structure it represents.
procedures, location and sample size
The procedures used in sampling shall include the use of every precaution that will assist in
obtaining samples that are truly representative of the and of the concrete.
nature and conditions
Intermittent scooping of the sample in shovelfuls or bucketfuls into a wheelbarrow or tray as the
concrete continues to flow down the delivery chute is an acceptable technique?
False
,The concrete sample must be protected at all times from sun, wind, and
rapid evaporation, contaminants
the minimum size sample for making three 100mm diameter strength test cylinder specimens is
20l for 100x200mm
The grab sample form a mixer must be obtained between the % and %points of the
discharge(except when sampling prior to the addition of a super plasticizer.)
10, 90
When the concrete contains aggregate whose nominal size is larger than that permitted for a
particular test method, the sample of concrete must be before making the test(except for
Density tests)
Wet Sieved(over the appropriate sieve size)
, When sampling for uniformity of mixed concrete grab samples shall be obtained from
widely separated portions of the batch during discharge
Three
The temperature of the concrete must be determined within minutes of obtaining the grab
sample.
5 minutes
Air content (pressure method) measurement and slump must both be completed within
minutes after the sample has been transported and remixed.
10 minutes
Moulding of concrete strength cylinders or flexural beams must be completed within
minutes after the sample has been transported and remixed.
20 minutes
