ACI CONCRETE FIELD TESTING TECHNICIAN GRADE 1
LATEST EXAM 2025 WITH 140 PREP QUESTIONS AND
CORRECT ANSWERS/ ACI FIELD TESTING GRADE 1
EXAM 2025/ CONCRETE FIELD TESTING GRADE 1 TEST
Q1. Start molding specimens for strength tests within 30 minutes after fabricating the composite
sample.
A. True
B. False - ANSWER-B. False
ASTM C172 -Para (4.1.2) - Start molding.
specimens for strength tests within 15 min after fabricating the
composite sample.
Q2. The maximum allowable time between obtaining the first and last portions of the composite
sample may not exceed 5 minutes.
A. True
B. False - ANSWER-B. False
ASTM C172 - Para (4.1)- The elapsed time shall not exceed 15 min. between obtaining the first and
final portions of the composite sample.
Q3. The composite concrete sample must be protected from sun, wind, contamination and rapid
evaporation.
A. True
B. False - ANSWER-A. True
ASTM C172 - Para (4.1.2)
,Q4. If the concrete contains 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 - ANSWER-A. True
ASTM C172- Para (6.1)
Q5. The composite sample should not be remixed before beginning any tests.
A. True
B. False - ANSWER-B. False
ASTM C172-Para (4.1.1) -The sample shall be combined and remixed with a shovel the minimum
amount necessary to ensure uniformity and compliance with the maximum time limits
Q6. Sampling should normally be performed, as the concrete is discharged from the mixer.
A. True
B. False - ANSWER-B. False
ASTM C172-Para (5). NOTE 2—Sampling should normally be performed as the concrete is 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 includes sampling from stationary mixers, paving mixers, truck mixers,
agitators, and non-agitating equipment.
A. True
,B. False - ANSWER-A. True
ASTM C172- Para (1.1)
Q8. After sampling is completed, start the tests for slump and air content within:
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
D. None of the above - ANSWER-D. None of the above
ASTM C172- Para (4.1.2) Start tests for slump, temperature, and air content within 5 min after
obtaining the final portion of the composite sample.
Q9. In any case, do not obtain samples until:
A. All the water and admixtures have been 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 - ANSWER-A. All the water and admixtures have been added to the concrete.
ASTM C172- Para (5.2.3). In any case do not obtain samples until after all of the water has been
added to the mixer.
Q10. No samples shall be taken before_________ or after_________ of the batch has been
discharged.
A. 10% or after 90%
B. 20% or after 90%
C. 20% or after 80%
D. None of the above - ANSWER-A. 10% or after 90%
, ASTM C172- Para (5.2.1).
NOTE 3—No samples should be taken before 10 % or after 90 % of the batch has been discharged.
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.
Q101. ASTM C138 states, "the minimum capacity of the bucket depends on the maximum slump
requirement."
A. True
B. False - ANSWER-B. False
ASTM C138- (Para 4.4)
The minimum capacity of the measure shall conform to the requirements of Table 1 based on the
nominal size of aggregate in the concrete to be tested.
Q102. According to ASTM C138, after rodding each layer, tap the sides of the container, with the rod
exactly 25 times.
A. True
B. False - ANSWER-B. False (10 to 15 times with the appropriate mallet)
ASTM C138- (Para 6.3)
After each layer is rodded, tap the sides of the measure 10 to 15 times with the appropriate mallet to
close any voids left by the tamping rod and to release any large bubbles of air that may have been
trapped.
Q103. The outside of the density bucket should be cleaned before weighing.
LATEST EXAM 2025 WITH 140 PREP QUESTIONS AND
CORRECT ANSWERS/ ACI FIELD TESTING GRADE 1
EXAM 2025/ CONCRETE FIELD TESTING GRADE 1 TEST
Q1. Start molding specimens for strength tests within 30 minutes after fabricating the composite
sample.
A. True
B. False - ANSWER-B. False
ASTM C172 -Para (4.1.2) - Start molding.
specimens for strength tests within 15 min after fabricating the
composite sample.
Q2. The maximum allowable time between obtaining the first and last portions of the composite
sample may not exceed 5 minutes.
A. True
B. False - ANSWER-B. False
ASTM C172 - Para (4.1)- The elapsed time shall not exceed 15 min. between obtaining the first and
final portions of the composite sample.
Q3. The composite concrete sample must be protected from sun, wind, contamination and rapid
evaporation.
A. True
B. False - ANSWER-A. True
ASTM C172 - Para (4.1.2)
,Q4. If the concrete contains 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 - ANSWER-A. True
ASTM C172- Para (6.1)
Q5. The composite sample should not be remixed before beginning any tests.
A. True
B. False - ANSWER-B. False
ASTM C172-Para (4.1.1) -The sample shall be combined and remixed with a shovel the minimum
amount necessary to ensure uniformity and compliance with the maximum time limits
Q6. Sampling should normally be performed, as the concrete is discharged from the mixer.
A. True
B. False - ANSWER-B. False
ASTM C172-Para (5). NOTE 2—Sampling should normally be performed as the concrete is 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 includes sampling from stationary mixers, paving mixers, truck mixers,
agitators, and non-agitating equipment.
A. True
,B. False - ANSWER-A. True
ASTM C172- Para (1.1)
Q8. After sampling is completed, start the tests for slump and air content within:
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
D. None of the above - ANSWER-D. None of the above
ASTM C172- Para (4.1.2) Start tests for slump, temperature, and air content within 5 min after
obtaining the final portion of the composite sample.
Q9. In any case, do not obtain samples until:
A. All the water and admixtures have been 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 - ANSWER-A. All the water and admixtures have been added to the concrete.
ASTM C172- Para (5.2.3). In any case do not obtain samples until after all of the water has been
added to the mixer.
Q10. No samples shall be taken before_________ or after_________ of the batch has been
discharged.
A. 10% or after 90%
B. 20% or after 90%
C. 20% or after 80%
D. None of the above - ANSWER-A. 10% or after 90%
, ASTM C172- Para (5.2.1).
NOTE 3—No samples should be taken before 10 % or after 90 % of the batch has been discharged.
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.
Q101. ASTM C138 states, "the minimum capacity of the bucket depends on the maximum slump
requirement."
A. True
B. False - ANSWER-B. False
ASTM C138- (Para 4.4)
The minimum capacity of the measure shall conform to the requirements of Table 1 based on the
nominal size of aggregate in the concrete to be tested.
Q102. According to ASTM C138, after rodding each layer, tap the sides of the container, with the rod
exactly 25 times.
A. True
B. False - ANSWER-B. False (10 to 15 times with the appropriate mallet)
ASTM C138- (Para 6.3)
After each layer is rodded, tap the sides of the measure 10 to 15 times with the appropriate mallet to
close any voids left by the tamping rod and to release any large bubbles of air that may have been
trapped.
Q103. The outside of the density bucket should be cleaned before weighing.
