ACI- Concrete Field-Testing Technician - Grade 1 Exam
2025/2026 Most Recent Exam / Actual Complete Real Exam
Questions And Correct Answers (Verified Answers) Already
Graded A+ ,Guaranteed Success!! Newest Exam / Just
Released!!
ASTM C143- (Para 7.1)
place it on a rigid, flat, level, moist, nonabsorbent surface, free
of vibration, and
that is large enough to contain all of the
slumped concrete.
Q.In order to determine slump, you should measure the
vertical distance
from:
A. Top of the mold to the highest point of the slumped concrete
B. Top of the concrete to the base of the concrete
C. Top of the mold to the displaced original center of the top
surface
D. None of the above - ANSWER-C. Top of the mold to the
displaced original center of the top surface.
ASTM C143- (Para 7.4)
,Immediately measure the slump by
determining the
vertical difference between the top of the
mold and the
displaced original center of the top surface of
the specimen.
Q- How much time is allowed to conduct the slump test from
beginning to
completion? - ANSWER-within an elapsed time
of 21⁄2 min.
ASTM C143- (Para 7.4)
Complete the entire test from the start of the
filling through removal of the mold without
interruption and complete it within an elapsed
time of 21⁄2 min.
Q- The diameter of the tamping rod used in this test method
is____________
. - ANSWER-16 mm [5⁄8 in.] _+ 2 mm [1⁄16 in.]
diameter.
ASTM C138- (Para 4.2)
Tamping Rod—A round, smooth, straight
steel rod, with
,a 16 mm [5⁄8 in.] _+ 2 mm [1⁄16 in.]
diameter
Q What's the required shape of the tamping end of the rod?
- ANSWER-
rounded to a
hemispherical tip.
ASTM C138- (Para 4.2)
The rod shall have the tamping end or both ends
rounded to a
hemispherical tip of the same diameter
as the rod.
Q What is the required minimum frequency of the vibrator
used in this test
method? - ANSWER-at least 9000 vibrations per
minute [150 Hz]
ASTM C138- (Para 4.3)
The vibrator frequency shall be at least 9000 vibrations per
minute [150 Hz]
while the vibrator is operating in the
concrete.
Q The outside diameter or side dimension of the vibrating
element must be at least_______ but not greater
, than__________ . - ANSWER-at least 19 mm [0.75 in.] and not
greater than 38 mm [1.50 in.]
ASTM C138- (Para 4.3)
The outside diameter or the side dimension of the vibrating
element shall be at
least 19 mm [0.75 in.] and not greater than 38 mm
[1.50 in.].
Q. Aplastic container can be used for the measure in this test
method.
A.
True
B. False - ANSWER-B.
False
ASTM C138- (Para 4.3)
A cylindrical container made of steel or other suitable metal.
Q What is the minimum thickness of a metal strike-off plate? -
ANSWER-at
least 6 mm [1⁄4 in.]
thick
ASTM C138- (Para 4.5)
2025/2026 Most Recent Exam / Actual Complete Real Exam
Questions And Correct Answers (Verified Answers) Already
Graded A+ ,Guaranteed Success!! Newest Exam / Just
Released!!
ASTM C143- (Para 7.1)
place it on a rigid, flat, level, moist, nonabsorbent surface, free
of vibration, and
that is large enough to contain all of the
slumped concrete.
Q.In order to determine slump, you should measure the
vertical distance
from:
A. Top of the mold to the highest point of the slumped concrete
B. Top of the concrete to the base of the concrete
C. Top of the mold to the displaced original center of the top
surface
D. None of the above - ANSWER-C. Top of the mold to the
displaced original center of the top surface.
ASTM C143- (Para 7.4)
,Immediately measure the slump by
determining the
vertical difference between the top of the
mold and the
displaced original center of the top surface of
the specimen.
Q- How much time is allowed to conduct the slump test from
beginning to
completion? - ANSWER-within an elapsed time
of 21⁄2 min.
ASTM C143- (Para 7.4)
Complete the entire test from the start of the
filling through removal of the mold without
interruption and complete it within an elapsed
time of 21⁄2 min.
Q- The diameter of the tamping rod used in this test method
is____________
. - ANSWER-16 mm [5⁄8 in.] _+ 2 mm [1⁄16 in.]
diameter.
ASTM C138- (Para 4.2)
Tamping Rod—A round, smooth, straight
steel rod, with
,a 16 mm [5⁄8 in.] _+ 2 mm [1⁄16 in.]
diameter
Q What's the required shape of the tamping end of the rod?
- ANSWER-
rounded to a
hemispherical tip.
ASTM C138- (Para 4.2)
The rod shall have the tamping end or both ends
rounded to a
hemispherical tip of the same diameter
as the rod.
Q What is the required minimum frequency of the vibrator
used in this test
method? - ANSWER-at least 9000 vibrations per
minute [150 Hz]
ASTM C138- (Para 4.3)
The vibrator frequency shall be at least 9000 vibrations per
minute [150 Hz]
while the vibrator is operating in the
concrete.
Q The outside diameter or side dimension of the vibrating
element must be at least_______ but not greater
, than__________ . - ANSWER-at least 19 mm [0.75 in.] and not
greater than 38 mm [1.50 in.]
ASTM C138- (Para 4.3)
The outside diameter or the side dimension of the vibrating
element shall be at
least 19 mm [0.75 in.] and not greater than 38 mm
[1.50 in.].
Q. Aplastic container can be used for the measure in this test
method.
A.
True
B. False - ANSWER-B.
False
ASTM C138- (Para 4.3)
A cylindrical container made of steel or other suitable metal.
Q What is the minimum thickness of a metal strike-off plate? -
ANSWER-at
least 6 mm [1⁄4 in.]
thick
ASTM C138- (Para 4.5)
