ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
Q1. Start molding specimens for strength tests within 30
minutes after fabricating the composite sample.
A. True
B. False - Correct Answers ✅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 - Correct Answers ✅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.
,ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
A. True
B. False - Correct Answers ✅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 - Correct Answers ✅A. True
ASTM C172- Para (6.1)
Q5. The composite sample should not be remixed before
beginning any tests.
A. True
B. False - Correct Answers ✅B. False
ASTM C172-Para (4.1.1) -The sample shall be combined and
remixed with a shovel the minimum amount necessary to
,ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
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 - Correct Answers ✅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 - Correct Answers ✅A. True
, ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
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 - Correct Answers ✅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 - Correct Answers ✅A. All the water
and admixtures have been added to the concrete.
Grade 1 Exam Questions and Answers
2025
Q1. Start molding specimens for strength tests within 30
minutes after fabricating the composite sample.
A. True
B. False - Correct Answers ✅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 - Correct Answers ✅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.
,ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
A. True
B. False - Correct Answers ✅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 - Correct Answers ✅A. True
ASTM C172- Para (6.1)
Q5. The composite sample should not be remixed before
beginning any tests.
A. True
B. False - Correct Answers ✅B. False
ASTM C172-Para (4.1.1) -The sample shall be combined and
remixed with a shovel the minimum amount necessary to
,ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
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 - Correct Answers ✅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 - Correct Answers ✅A. True
, ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and Answers
2025
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 - Correct Answers ✅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 - Correct Answers ✅A. All the water
and admixtures have been added to the concrete.
