ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
Q1. Start molding specimens B. False ASTM C172
for strength tests within 30
minutes after fabricating the - Para (4.1.2)
composite sample. A. True B.
False - Start molding. specimens for
strength tests within 15 min after
fabricating the composite sample.
Q2. The maximum allowable B. False ASTM C172
time between obtaining the
first and last portions of the - Para (4.1)- The elapsed time shall
composite sample may not not exceed 15 min. between
exceed 5 minutes. A. True B. obtaining the first and final portions
False of the composite sample.
Q3. The composite concrete A. True ASTM C172
sample must be protected
from sun, wind, contamination - Para (4.1.2)
and rapid evaporation. A. True
B. False
Q4. If the concrete contains A. True ASTM C172- Para (6.1)
aggregates larger than those
that are 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 ASTM C172-Para (4.1.1)
should not be remixed before
beginning any tests. A. True B. - The sample shall be combined and
False remixed with a shovel the minimum
amount necessary to ensure
uniformity and compliance with the
maximum time limits
Q6. Sampling should normally B. False ASTM C172-Para (5). NOTE
be performed, as the concrete 2-Sampling should normally be
is discharged from the mixer. performed as the concrete is
A. True B. False delivered from the mixer. To the
conveying vehicle used to transport
the 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 ASTM C172- Para (1.1)
includes sampling from
stationary mixers, paving
mixers, truck mixers,
agitators, and non-agitating
equipment. A. True B. False
Q8. After sampling is D. None of the above ASTM C172-
completed, start the tests for Para (4.1.2) Start tests for slump,
slump and air content within: temperature, and air content within
A. 2 ½ minutes B. 10 minutes 5 min after obtaining the final
C. 15 minutes D. None of the portion of the composite sample.
above
, Q9. In any case, do not obtain A. All the water and admixtures
samples until: A. All the water have been added to the concrete.
and admixtures have been ASTM C172- Para (5.2.3). In any case
added to the concrete B. 200 do not obtain samples until after all
revolutions of the drum have of the water has been added to the
been obtained C. ½ of the mixer.
water has been added D. None
of the above
Q10. No samples shall be A. 10% or after 90% ASTM C172-
taken before_________ or Para (5.2.1). NOTE 3-No samples
after_________ of the batch has should be taken before 10 % or after
been discharged. A. 10% or 90 % of the batch has been
after 90% B. 20% or after 90% discharged. Due to the difficulty of
C. 20% or after 80% D. None determining the actual quantity of
of the above 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.
Q11. When strength tests are B. 1 cubic foot ASTM C172- Para
to be made, the minimum size (5.1). Make the samples to be used
of the composite sample shall for strength tests a minimum of 28 L
be: A. ¼ cubic foot B. 1 cubic (1 ft3).
foot C. Any convenient size D.
1 Wheelbarrow
Q12. Sample the concrete B. Passing a receptacle completely
from the chute of a truck through the discharge steam or by
mixer by: A. Raising chute to completely diverting the discharge
stop the flow and scoop into the sample container. ASTM
concrete from there into the C172- Para (5.2.3).
slump cone and cylinder molds
Grade 1 Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
Q1. Start molding specimens B. False ASTM C172
for strength tests within 30
minutes after fabricating the - Para (4.1.2)
composite sample. A. True B.
False - Start molding. specimens for
strength tests within 15 min after
fabricating the composite sample.
Q2. The maximum allowable B. False ASTM C172
time between obtaining the
first and last portions of the - Para (4.1)- The elapsed time shall
composite sample may not not exceed 15 min. between
exceed 5 minutes. A. True B. obtaining the first and final portions
False of the composite sample.
Q3. The composite concrete A. True ASTM C172
sample must be protected
from sun, wind, contamination - Para (4.1.2)
and rapid evaporation. A. True
B. False
Q4. If the concrete contains A. True ASTM C172- Para (6.1)
aggregates larger than those
that are 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 ASTM C172-Para (4.1.1)
should not be remixed before
beginning any tests. A. True B. - The sample shall be combined and
False remixed with a shovel the minimum
amount necessary to ensure
uniformity and compliance with the
maximum time limits
Q6. Sampling should normally B. False ASTM C172-Para (5). NOTE
be performed, as the concrete 2-Sampling should normally be
is discharged from the mixer. performed as the concrete is
A. True B. False delivered from the mixer. To the
conveying vehicle used to transport
the 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 ASTM C172- Para (1.1)
includes sampling from
stationary mixers, paving
mixers, truck mixers,
agitators, and non-agitating
equipment. A. True B. False
Q8. After sampling is D. None of the above ASTM C172-
completed, start the tests for Para (4.1.2) Start tests for slump,
slump and air content within: temperature, and air content within
A. 2 ½ minutes B. 10 minutes 5 min after obtaining the final
C. 15 minutes D. None of the portion of the composite sample.
above
, Q9. In any case, do not obtain A. All the water and admixtures
samples until: A. All the water have been added to the concrete.
and admixtures have been ASTM C172- Para (5.2.3). In any case
added to the concrete B. 200 do not obtain samples until after all
revolutions of the drum have of the water has been added to the
been obtained C. ½ of the mixer.
water has been added D. None
of the above
Q10. No samples shall be A. 10% or after 90% ASTM C172-
taken before_________ or Para (5.2.1). NOTE 3-No samples
after_________ of the batch has should be taken before 10 % or after
been discharged. A. 10% or 90 % of the batch has been
after 90% B. 20% or after 90% discharged. Due to the difficulty of
C. 20% or after 80% D. None determining the actual quantity of
of the above 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.
Q11. When strength tests are B. 1 cubic foot ASTM C172- Para
to be made, the minimum size (5.1). Make the samples to be used
of the composite sample shall for strength tests a minimum of 28 L
be: A. ¼ cubic foot B. 1 cubic (1 ft3).
foot C. Any convenient size D.
1 Wheelbarrow
Q12. Sample the concrete B. Passing a receptacle completely
from the chute of a truck through the discharge steam or by
mixer by: A. Raising chute to completely diverting the discharge
stop the flow and scoop into the sample container. ASTM
concrete from there into the C172- Para (5.2.3).
slump cone and cylinder molds
