ACI- Concrete Field-Testing Technician -
Grade 1 Exam Questions and verified
Answers
Question 1
Q67.When raising the slump mold, it should not be rotated or twisted.
A. True
B. False
Correct Answer
A. True
ASTM C143- (Para 7.3)
Raise the mold a distance of 12 in. [300 mm] in 5 _+ 2 s by a steady upward lift with
no lateral or torsional motion.
Question 2
Q88. What method of consolidation must be used when the slump is less than 25 mm
[1 in.]?
Correct Answer
vibration
ASTM C138- (Para 6.1)
Consolidate concretes with a slump less than 25 mm [1 in.] by vibration.
Page 1 of 54
,Question 3
Q24. Start molding specimens for strength tests within how many min. after
fabricating the composite sample?
Correct Answer
within 15 min
ASTM C172- (Para. 4.1.2)
Question 4
Q54. The slump cone should be raised carefully, vertically upward, in a steady motion
in ________ Seconds.
A. 2 to 6
B. 4 to 8
C. 3 to 7
D. 5 to 9
Correct Answer
C. 3 to 7
ASTM C143-(Para 7.3)
Remove the mold immediately from the concrete by raising it carefully in a vertical
direction. Raise the mold a distance of 12 in. [300 mm] in 5 +_ 2 s by a steady
upward lift with no lateral or
torsional motion.
Question 5
Q5. The composite sample should not be remixed before beginning any tests.
A. True
B. False
Correct 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
Page 2 of 54
,Question 6
Q51. The slump cone is filled in three layers of equal volume.
A. True
B. False
Correct Answer
B. False
ASTM C143-(Para 7.1)
in three layers, each approximately one third the volume of the mold.
Question 7
Q47. When filling the final layer of the slump cone, never heap the concrete above the
top of the mold.
A. True
B. False
Correct Answer
B. False
ASTM C143-(Para 7.3)
In filling and rodding the top layer, heap the concrete above the mold before
rodding is started.
Question 8
Q77. What's the required shape of the tamping end of the rod?
Correct 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.
Page 3 of 54
, Question 9
Q84. Measures other than air meter bowls used for this test must conform to Test
Method_________.
Correct Answer
C29/C29M
ASTM C138- (Para 4.4)
All measures, except for measuring bowls of air meters which are also used for Test
Method C138/C138M tests, shall conform to the requirements of Test Method
C29/C29M.
Question 10
Q92. If vibration is the method of consolidation, the measure must be filed in ______
approximately equal layers.
Correct Answer
two
ASTM C138- (Para 6.4)
Fill and vibrate the measure in two approximately equal layers.
Question 11
Q133. What must be done if there is an excessive amount of concrete in the measure
following consolidation of the final layer?
Correct Answer
remove a representative portion of concrete with a trowel or scoop before the
measure is struck off.
ASTM C231- (Para 8.1.4)
NOTE 6—If the measure contains a great excess, remove a representative portion of
concrete with a trowel or scoop before the measure is struck off.
Page 4 of 54
Grade 1 Exam Questions and verified
Answers
Question 1
Q67.When raising the slump mold, it should not be rotated or twisted.
A. True
B. False
Correct Answer
A. True
ASTM C143- (Para 7.3)
Raise the mold a distance of 12 in. [300 mm] in 5 _+ 2 s by a steady upward lift with
no lateral or torsional motion.
Question 2
Q88. What method of consolidation must be used when the slump is less than 25 mm
[1 in.]?
Correct Answer
vibration
ASTM C138- (Para 6.1)
Consolidate concretes with a slump less than 25 mm [1 in.] by vibration.
Page 1 of 54
,Question 3
Q24. Start molding specimens for strength tests within how many min. after
fabricating the composite sample?
Correct Answer
within 15 min
ASTM C172- (Para. 4.1.2)
Question 4
Q54. The slump cone should be raised carefully, vertically upward, in a steady motion
in ________ Seconds.
A. 2 to 6
B. 4 to 8
C. 3 to 7
D. 5 to 9
Correct Answer
C. 3 to 7
ASTM C143-(Para 7.3)
Remove the mold immediately from the concrete by raising it carefully in a vertical
direction. Raise the mold a distance of 12 in. [300 mm] in 5 +_ 2 s by a steady
upward lift with no lateral or
torsional motion.
Question 5
Q5. The composite sample should not be remixed before beginning any tests.
A. True
B. False
Correct 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
Page 2 of 54
,Question 6
Q51. The slump cone is filled in three layers of equal volume.
A. True
B. False
Correct Answer
B. False
ASTM C143-(Para 7.1)
in three layers, each approximately one third the volume of the mold.
Question 7
Q47. When filling the final layer of the slump cone, never heap the concrete above the
top of the mold.
A. True
B. False
Correct Answer
B. False
ASTM C143-(Para 7.3)
In filling and rodding the top layer, heap the concrete above the mold before
rodding is started.
Question 8
Q77. What's the required shape of the tamping end of the rod?
Correct 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.
Page 3 of 54
, Question 9
Q84. Measures other than air meter bowls used for this test must conform to Test
Method_________.
Correct Answer
C29/C29M
ASTM C138- (Para 4.4)
All measures, except for measuring bowls of air meters which are also used for Test
Method C138/C138M tests, shall conform to the requirements of Test Method
C29/C29M.
Question 10
Q92. If vibration is the method of consolidation, the measure must be filed in ______
approximately equal layers.
Correct Answer
two
ASTM C138- (Para 6.4)
Fill and vibrate the measure in two approximately equal layers.
Question 11
Q133. What must be done if there is an excessive amount of concrete in the measure
following consolidation of the final layer?
Correct Answer
remove a representative portion of concrete with a trowel or scoop before the
measure is struck off.
ASTM C231- (Para 8.1.4)
NOTE 6—If the measure contains a great excess, remove a representative portion of
concrete with a trowel or scoop before the measure is struck off.
Page 4 of 54
