ACI FIELD TESTING TECHNICIAN EXAM|QUESTIONS AND VERIFIED
ANSWERS|NEW UPDATE 2026/2027|GRADED A+
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.
CORRECT|ANSWER
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.
CORRECT|ANSWER
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?
CORRECT|ANSWER
False
The concrete sample must be protected at all times from sun, wind,____and
CORRECT|ANSWER
rapid evaporation, contaminants
the minimum size sample for making three 100mm diameter strength test cylinder specimens is
CORRECT|ANSWER
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.)
CORRECT|ANSWER
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)
CORRECT|ANSWER
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
CORRECT|ANSWER
Three
The temperature of the concrete must be determined within ___ minutes of obtaining the grab sample.
CORRECT|ANSWER
5 minutes
Air content (pressure method) measurement and slump must both be completed within ______ minutes
after the sample has been transported and remixed.
CORRECT|ANSWER
10 minutes
, Moulding of concrete strength cylinders or flexural beams must be completed within ____minutes after
the sample has been transported and remixed.
CORRECT|ANSWER
20 minutes
Air content (volumetric method) must be started within ____ minutes after the sample has been
transported and remixed.
CORRECT|ANSWER
5 minutes
What document produced by the concrete supplier contains information relating to identification of the
concrete sample?
CORRECT|ANSWER
The delivery ticket
Describe the operation of obtaining a sample for evaluation of concrete quality.
CORRECT|ANSWER
Obtain a single grab sample at one point of the discharge in as short a time as possible.
Between what two points of the mixer discharge must the concrete be sampled?
CORRECT|ANSWER
the 10% and 90% points
How is the sample obtained from the discharge stream of a mixer truck?
CORRECT|ANSWER
ANSWERS|NEW UPDATE 2026/2027|GRADED A+
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.
CORRECT|ANSWER
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.
CORRECT|ANSWER
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?
CORRECT|ANSWER
False
The concrete sample must be protected at all times from sun, wind,____and
CORRECT|ANSWER
rapid evaporation, contaminants
the minimum size sample for making three 100mm diameter strength test cylinder specimens is
CORRECT|ANSWER
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.)
CORRECT|ANSWER
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)
CORRECT|ANSWER
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
CORRECT|ANSWER
Three
The temperature of the concrete must be determined within ___ minutes of obtaining the grab sample.
CORRECT|ANSWER
5 minutes
Air content (pressure method) measurement and slump must both be completed within ______ minutes
after the sample has been transported and remixed.
CORRECT|ANSWER
10 minutes
, Moulding of concrete strength cylinders or flexural beams must be completed within ____minutes after
the sample has been transported and remixed.
CORRECT|ANSWER
20 minutes
Air content (volumetric method) must be started within ____ minutes after the sample has been
transported and remixed.
CORRECT|ANSWER
5 minutes
What document produced by the concrete supplier contains information relating to identification of the
concrete sample?
CORRECT|ANSWER
The delivery ticket
Describe the operation of obtaining a sample for evaluation of concrete quality.
CORRECT|ANSWER
Obtain a single grab sample at one point of the discharge in as short a time as possible.
Between what two points of the mixer discharge must the concrete be sampled?
CORRECT|ANSWER
the 10% and 90% points
How is the sample obtained from the discharge stream of a mixer truck?
CORRECT|ANSWER
