6/24/25, 9:12 AM )
ACI- Concrete Field-Testing Technician - Grade 1\\ TEST BANK EXAM
\NEWEST VERSION WITH COMPLETE QUESTIONS AND
ACCURATE DETAILED ANSWERS \LATEST UPDATE ||VERIFIED
SOLUTIONS ALREADY GRADED A+
Q1. Start molding B. False
specimens for strength tests
within 30 minutes after ASTM C172 -Para (4.1.2) - Start molding.
fabricating the composite specimens for strength tests within 15 min
sample. after fabricating the composite sample.
A. True
B. False
Q2. The maximum allowable B. False
time between obtaining the
first and last portions of the ASTM C172 - Para (4.1)- The elapsed time shall not
composite sample may exceed 15 min. between obtaining the first and final
not exceed 5 portions of the composite sample.
minutes.
A. True
B. False
Q3. The composite concrete A. True
sample must be protected
from sun, wind, ASTM C172 - Para (4.1.2)
contamination and rapid
evaporation.
A. True
B. False
/ 1/35
,6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
Q4. If the concrete contains A. True
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 tests. ASTM C172-Para (4.1.1) -The sample shall be combined
and remixed with a shovel the minimum amount
A. True necessary to ensure uniformity and compliance with the
B. False maximum time limits
B. False
Q6. Sampling should
normally be performed, as ASTM C172-Para (5). NOTE 2—Sampling should
the concrete is discharged normally be performed as the concrete is
from the mixer. delivered from the mixer.
A. True To the conveying vehicle used to transport the
B. False concrete to the forms; however, specifications may
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
2/35
,6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
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
Q9. In any case, do not A. All the water and admixtures have been added to the concrete.
obtain samples until:
ASTM C172- Para (5.2.3). In any case do not obtain
A. All the water and samples until after all of the water has been added to
admixtures have been the mixer.
added to the concrete
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
Q10. No samples shall be
taken
90% ASTM C172-
before_________ or after of the
batch
has been discharged. Para (5.2.1).
A. 10% or after 90% NOTE 3—No samples should be taken before 10 % or
B. 20% or after 90% after 90 % of the batch has been discharged.
C. 20% or after 80%
D. None of the above Due to the difficulty of determining the actual quantity of
concrete discharged, the
intent is to provide samples that are representative of
widely separated portions, but not the beginning and
the end of the load.
3/35
, 6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
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
Q12. Sample the concrete B.
from the chute of a truck
mixer by: Passing a receptacle completely through the discharge
steam or by completely diverting the discharge into
A. Raising chute to stop the the sample container.
flow and scoop concrete
from there into the slump ASTM C172- Para (5.2.3).
cone
and cylinder molds
B. Passing a receptacle
completely through the
discharge steam or by
completely
diverting the discharge into
the sample container
C. Holding a shovel in the
flow and direct half into a
bucket
D. None of the above
Q13. Fresh concrete to be C. Two or more regularly spaced intervals during
tested at the job site should discharge of the middle portion of the batch
be sampled from:
ASTM C172- Para (5.2.1).
A. The beginning of mixer
discharge
B. The last concrete discharged
C. Two or more regularly
spaced intervals during
discharge of the middle
portion of the batch
4/35
ACI- Concrete Field-Testing Technician - Grade 1\\ TEST BANK EXAM
\NEWEST VERSION WITH COMPLETE QUESTIONS AND
ACCURATE DETAILED ANSWERS \LATEST UPDATE ||VERIFIED
SOLUTIONS ALREADY GRADED A+
Q1. Start molding B. False
specimens for strength tests
within 30 minutes after ASTM C172 -Para (4.1.2) - Start molding.
fabricating the composite specimens for strength tests within 15 min
sample. after fabricating the composite sample.
A. True
B. False
Q2. The maximum allowable B. False
time between obtaining the
first and last portions of the ASTM C172 - Para (4.1)- The elapsed time shall not
composite sample may exceed 15 min. between obtaining the first and final
not exceed 5 portions of the composite sample.
minutes.
A. True
B. False
Q3. The composite concrete A. True
sample must be protected
from sun, wind, ASTM C172 - Para (4.1.2)
contamination and rapid
evaporation.
A. True
B. False
/ 1/35
,6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
Q4. If the concrete contains A. True
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 tests. ASTM C172-Para (4.1.1) -The sample shall be combined
and remixed with a shovel the minimum amount
A. True necessary to ensure uniformity and compliance with the
B. False maximum time limits
B. False
Q6. Sampling should
normally be performed, as ASTM C172-Para (5). NOTE 2—Sampling should
the concrete is discharged normally be performed as the concrete is
from the mixer. delivered from the mixer.
A. True To the conveying vehicle used to transport the
B. False concrete to the forms; however, specifications may
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
2/35
,6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
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
Q9. In any case, do not A. All the water and admixtures have been added to the concrete.
obtain samples until:
ASTM C172- Para (5.2.3). In any case do not obtain
A. All the water and samples until after all of the water has been added to
admixtures have been the mixer.
added to the concrete
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
Q10. No samples shall be
taken
90% ASTM C172-
before_________ or after of the
batch
has been discharged. Para (5.2.1).
A. 10% or after 90% NOTE 3—No samples should be taken before 10 % or
B. 20% or after 90% after 90 % of the batch has been discharged.
C. 20% or after 80%
D. None of the above Due to the difficulty of determining the actual quantity of
concrete discharged, the
intent is to provide samples that are representative of
widely separated portions, but not the beginning and
the end of the load.
3/35
, 6/24/25, 11:03 AM ACI- Concrete Field-Testing Technician - Grade 1
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
Q12. Sample the concrete B.
from the chute of a truck
mixer by: Passing a receptacle completely through the discharge
steam or by completely diverting the discharge into
A. Raising chute to stop the the sample container.
flow and scoop concrete
from there into the slump ASTM C172- Para (5.2.3).
cone
and cylinder molds
B. Passing a receptacle
completely through the
discharge steam or by
completely
diverting the discharge into
the sample container
C. Holding a shovel in the
flow and direct half into a
bucket
D. None of the above
Q13. Fresh concrete to be C. Two or more regularly spaced intervals during
tested at the job site should discharge of the middle portion of the batch
be sampled from:
ASTM C172- Para (5.2.1).
A. The beginning of mixer
discharge
B. The last concrete discharged
C. Two or more regularly
spaced intervals during
discharge of the middle
portion of the batch
4/35
