CI Concrete Field Testing Technician – Grade 1 Final
A
& Practice Exam 2025 – Complete Verified Questions
with Detailed Answers
1. Start molding specimensfor strength tests within 30 minutes
Q
after fabricating the composite sample.
A. True
B. False
B.False
STM C172 -Para (4.1.2) - Start
A
molding. specimens for strength tests
within 15 min after fabricating the
composite sample.
2. The maximum allowable time between obtaining the first and
Q
last portions of the composite sample may not exceed 5 minutes.
A. True
B. False
B.False
STM C172 - Para (4.1)- The elapsed time shall not exceed 15 min.
A
between obtaining the first and final portions of the composite sample.
, 3. The composite concrete sample must be protected from sun,
Q
wind, contamination and rapid evaporation.
A. True
B. False
A.True
ASTM C172 - Para (4.1.2)
4. If the concrete contains aggregates larger than those that are
Q
appropriate for a size of mold or equipment used, the sample should
be wet sieved before making the test.
A. True
B. False
A.True
ASTM C172- Para (6.1)
5. The composite sample should not be remixed before beginning
Q
any tests.
A. True
B. False
B.False
STM C172-Para (4.1.1) -The sample shall be combined and remixed with
A
a shovel the minimum amount necessary to ensure uniformity and
compliance with the maximum time limits
, 6. Sampling should normally be performed, as the concrete is
Q
discharged from the mixer.
A. True
B. False
B. False
STM C172-Para (5). NOTE 2—Sampling should normally be performed as
A
the concrete is delivered from the mixer.
o the conveying vehicle used to transport the concrete to the forms;
T
however, specifications may require other points of sampling, such as
the discharge of a concrete pump.
7. ASTM Method C172 includes sampling from stationary mixers,
Q
paving mixers, truck mixers, agitators, and non-agitating
equipment.
A. True
B. False
A. True
ASTM C172- Para (1.1)
8. After sampling is completed, start the tests for slump and air
Q
content within:
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
, D. None of the above
D.None of the above
STM C172- Para (4.1.2) Start tests for slump, temperature, and air
A
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
A.All the water and admixtures have been added to the concrete.
STM C172- Para (5.2.3). In any case do not obtain samples until after all
A
of the water has been added to the mixer.
10. No samples shall be taken before_________ or after_________ of
Q
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
A.10% or after 90%
ASTM C172- Para (5.2.1).
A
& Practice Exam 2025 – Complete Verified Questions
with Detailed Answers
1. Start molding specimensfor strength tests within 30 minutes
Q
after fabricating the composite sample.
A. True
B. False
B.False
STM C172 -Para (4.1.2) - Start
A
molding. specimens for strength tests
within 15 min after fabricating the
composite sample.
2. The maximum allowable time between obtaining the first and
Q
last portions of the composite sample may not exceed 5 minutes.
A. True
B. False
B.False
STM C172 - Para (4.1)- The elapsed time shall not exceed 15 min.
A
between obtaining the first and final portions of the composite sample.
, 3. The composite concrete sample must be protected from sun,
Q
wind, contamination and rapid evaporation.
A. True
B. False
A.True
ASTM C172 - Para (4.1.2)
4. If the concrete contains aggregates larger than those that are
Q
appropriate for a size of mold or equipment used, the sample should
be wet sieved before making the test.
A. True
B. False
A.True
ASTM C172- Para (6.1)
5. The composite sample should not be remixed before beginning
Q
any tests.
A. True
B. False
B.False
STM C172-Para (4.1.1) -The sample shall be combined and remixed with
A
a shovel the minimum amount necessary to ensure uniformity and
compliance with the maximum time limits
, 6. Sampling should normally be performed, as the concrete is
Q
discharged from the mixer.
A. True
B. False
B. False
STM C172-Para (5). NOTE 2—Sampling should normally be performed as
A
the concrete is delivered from the mixer.
o the conveying vehicle used to transport the concrete to the forms;
T
however, specifications may require other points of sampling, such as
the discharge of a concrete pump.
7. ASTM Method C172 includes sampling from stationary mixers,
Q
paving mixers, truck mixers, agitators, and non-agitating
equipment.
A. True
B. False
A. True
ASTM C172- Para (1.1)
8. After sampling is completed, start the tests for slump and air
Q
content within:
A. 2 ½ minutes
B. 10 minutes
C. 15 minutes
, D. None of the above
D.None of the above
STM C172- Para (4.1.2) Start tests for slump, temperature, and air
A
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
A.All the water and admixtures have been added to the concrete.
STM C172- Para (5.2.3). In any case do not obtain samples until after all
A
of the water has been added to the mixer.
10. No samples shall be taken before_________ or after_________ of
Q
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
A.10% or after 90%
ASTM C172- Para (5.2.1).
