9/8/25, 7:15 AM ACI- Concrete Field-Testing Technician - Grade 1 Exam Questions & Answers | 100% Verified solutions |Questions with Correct Ans…
ACI- Concrete Field-Testing Technician - Grade 1
Exam Questions & Answers | 100% Verified
solutions |Questions with Correct Answers 2025
latest update!!
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Terms in this set (133)
Q1. Start molding B. False
specimens for strength
tests within 30 minutes ASTM C172 -Para (4.1.2) - Start molding.
after fabricating the specimens for strength tests within 15 min after
composite sample. fabricating the
composite sample.
A. True
B. False
Q2. The maximum B. False
allowable time between
obtaining the first and last ASTM C172 - Para (4.1)- The elapsed time shall not
portions of the composite exceed 15 min. between obtaining the first and final
sample may not exceed 5 portions of the composite sample.
minutes.
A. True
B. False
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Q3. The composite A. True
concrete sample must be
protected from sun, wind, ASTM C172 - Para (4.1.2)
contamination and rapid
evaporation.
A. True
B. False
Q4. If the concrete A. True
contains aggregates
larger than those that are ASTM C172- Para (6.1)
appropriate for a size of
mold or equipment used,
the sample should be wet
sieved before making the
test.
A. True
B. False
Q5. The composite sample B. False
should not be remixed
before beginning any ASTM C172-Para (4.1.1) -The sample shall be combined
tests. and remixed with a shovel the minimum amount
necessary to ensure uniformity and compliance with
A. True the maximum time limits
B. False
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B. False
Q6. Sampling should
ASTM C172-Para (5). NOTE 2—Sampling should
normally be performed, as
normally be performed as the concrete is delivered
the concrete is discharged
from the mixer.
from the mixer.
To the conveying vehicle used to transport the
A. True
concrete to the forms; however, specifications may
B. False
require other points of sampling, such as the
discharge of a concrete pump.
Q7. ASTM Method C172 A. True
includes sampling from
stationary mixers, paving ASTM C172- Para (1.1)
mixers, truck mixers,
agitators, and non-
agitating equipment.
A. True
B. False
Q8. After sampling is D. None of the above
completed, start the tests
for slump and air content ASTM C172- Para (4.1.2) Start tests for slump,
within: temperature, and air content within 5 min after
obtaining the final portion of the composite sample.
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
D. None of the above
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Q9. In any case, do not A. All the water and admixtures have been added to
obtain samples until: the concrete.
A. All the water and ASTM C172- Para (5.2.3). In any case do not obtain
admixtures have been samples until after all of the water has been added to
added to the concrete the mixer.
B. 200 revolutions of the
drum have been obtained
C. ½ of the water has been
added
D. None of the above
A. 10% or after 90%
Q10. No samples shall be
ASTM C172- Para (5.2.1).
taken before_________ or
after_________ of the batch
NOTE 3—No samples should be taken before 10 % or
has been discharged.
after 90 % of the batch has been discharged.
A. 10% or after 90%
Due to the difficulty of determining the actual quantity
B. 20% or after 90%
of concrete discharged, the intent is to provide
C. 20% or after 80%
samples that are representative of widely separated
D. None of the above
portions, but not the beginning and the end of the
load.
Q11. When strength tests B. 1 cubic foot
are to be made, the
minimum size of the ASTM C172- Para (5.1).
composite sample shall
be: Make the samples to be used for strength tests a
minimum of 28 L (1 ft3).
A. ¼ cubic foot
B. 1 cubic foot
C. Any convenient size
D. 1 Wheelbarrow
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ACI- Concrete Field-Testing Technician - Grade 1
Exam Questions & Answers | 100% Verified
solutions |Questions with Correct Answers 2025
latest update!!
Save
Terms in this set (133)
Q1. Start molding B. False
specimens for strength
tests within 30 minutes ASTM C172 -Para (4.1.2) - Start molding.
after fabricating the specimens for strength tests within 15 min after
composite sample. fabricating the
composite sample.
A. True
B. False
Q2. The maximum B. False
allowable time between
obtaining the first and last ASTM C172 - Para (4.1)- The elapsed time shall not
portions of the composite exceed 15 min. between obtaining the first and final
sample may not exceed 5 portions of the composite sample.
minutes.
A. True
B. False
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Q3. The composite A. True
concrete sample must be
protected from sun, wind, ASTM C172 - Para (4.1.2)
contamination and rapid
evaporation.
A. True
B. False
Q4. If the concrete A. True
contains aggregates
larger than those that are ASTM C172- Para (6.1)
appropriate for a size of
mold or equipment used,
the sample should be wet
sieved before making the
test.
A. True
B. False
Q5. The composite sample B. False
should not be remixed
before beginning any ASTM C172-Para (4.1.1) -The sample shall be combined
tests. and remixed with a shovel the minimum amount
necessary to ensure uniformity and compliance with
A. True the maximum time limits
B. False
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B. False
Q6. Sampling should
ASTM C172-Para (5). NOTE 2—Sampling should
normally be performed, as
normally be performed as the concrete is delivered
the concrete is discharged
from the mixer.
from the mixer.
To the conveying vehicle used to transport the
A. True
concrete to the forms; however, specifications may
B. False
require other points of sampling, such as the
discharge of a concrete pump.
Q7. ASTM Method C172 A. True
includes sampling from
stationary mixers, paving ASTM C172- Para (1.1)
mixers, truck mixers,
agitators, and non-
agitating equipment.
A. True
B. False
Q8. After sampling is D. None of the above
completed, start the tests
for slump and air content ASTM C172- Para (4.1.2) Start tests for slump,
within: temperature, and air content within 5 min after
obtaining the final portion of the composite sample.
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
D. None of the above
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Q9. In any case, do not A. All the water and admixtures have been added to
obtain samples until: the concrete.
A. All the water and ASTM C172- Para (5.2.3). In any case do not obtain
admixtures have been samples until after all of the water has been added to
added to the concrete the mixer.
B. 200 revolutions of the
drum have been obtained
C. ½ of the water has been
added
D. None of the above
A. 10% or after 90%
Q10. No samples shall be
ASTM C172- Para (5.2.1).
taken before_________ or
after_________ of the batch
NOTE 3—No samples should be taken before 10 % or
has been discharged.
after 90 % of the batch has been discharged.
A. 10% or after 90%
Due to the difficulty of determining the actual quantity
B. 20% or after 90%
of concrete discharged, the intent is to provide
C. 20% or after 80%
samples that are representative of widely separated
D. None of the above
portions, but not the beginning and the end of the
load.
Q11. When strength tests B. 1 cubic foot
are to be made, the
minimum size of the ASTM C172- Para (5.1).
composite sample shall
be: Make the samples to be used for strength tests a
minimum of 28 L (1 ft3).
A. ¼ cubic foot
B. 1 cubic foot
C. Any convenient size
D. 1 Wheelbarrow
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