ACI CONCRETE FIELD TESTING |!| |!| |!| |!|
TECHNICIANS GRADE 1 (IN CANADA) Exam |!| |!| |!| |!| |!| |!|
with accurate detailed solutions |!| |!| |!|
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✔✔Pass the receptacle completely through discharge stream
|!| |!| |!| |!| |!| |!| |!|
OR completely divert discharge stream into sample container.
|!| |!| |!| |!| |!| |!| |!| |!|
What is the minimu size of sample to be obtained when strength test
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
specimens are to be moulded? - correct answer✔✔20l when 100dia x|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
200mm cylinder are made |!| |!| |!|
30l when 150dia x 300mm cylinders are made
|!| |!| |!| |!| |!| |!| |!|
55l when three flexural beams are to be made
|!| |!| |!| |!| |!| |!| |!| |!|
From what conditions must the concrete sample be protected? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔Sun, wind, rapid evaporation and contamination |!| |!| |!| |!| |!|
What must be done between taking the sample form the mixer and
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
performing the test? - correct answer✔✔Transport the sample to the place
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
where the tests are to be performed
|!| |!| |!| |!| |!| |!|
Remix with a shovel |!| |!| |!|
What is the time limit for completion of sampling? - correct answer✔✔10
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
minutes
The test for temperature must be completed in how many minutes after
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
obtaining the sample? - correct answer✔✔5 minutes |!| |!| |!| |!| |!| |!|
Tests for slump and air content must be completed within how many
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
minutes after sample has been transported and remixed? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔10 minutes |!|
TECHNICIANS GRADE 1 (IN CANADA) Exam |!| |!| |!| |!| |!| |!|
with accurate detailed solutions |!| |!| |!|
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✔✔Pass the receptacle completely through discharge stream
|!| |!| |!| |!| |!| |!| |!|
OR completely divert discharge stream into sample container.
|!| |!| |!| |!| |!| |!| |!| |!|
What is the minimu size of sample to be obtained when strength test
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
specimens are to be moulded? - correct answer✔✔20l when 100dia x|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
200mm cylinder are made |!| |!| |!|
30l when 150dia x 300mm cylinders are made
|!| |!| |!| |!| |!| |!| |!|
55l when three flexural beams are to be made
|!| |!| |!| |!| |!| |!| |!| |!|
From what conditions must the concrete sample be protected? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔Sun, wind, rapid evaporation and contamination |!| |!| |!| |!| |!|
What must be done between taking the sample form the mixer and
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
performing the test? - correct answer✔✔Transport the sample to the place
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
where the tests are to be performed
|!| |!| |!| |!| |!| |!|
Remix with a shovel |!| |!| |!|
What is the time limit for completion of sampling? - correct answer✔✔10
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
minutes
The test for temperature must be completed in how many minutes after
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
obtaining the sample? - correct answer✔✔5 minutes |!| |!| |!| |!| |!| |!|
Tests for slump and air content must be completed within how many
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
minutes after sample has been transported and remixed? - correct
|!| |!| |!| |!| |!| |!| |!| |!| |!| |!|
answer✔✔10 minutes |!|
