ACI- Concrete Field-Testing Technician - Grade 1 Exam
Questions and Correct Answers
Question 1
Q37. The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of
____mm [__in] into the freshly mixed concrete.
Correct Answer
a minimum of 75 mm [3 in.] into the freshly mixed concrete.
ASTM C1064- (Para 7.1)
Question 2
Q124. If the concrete sample is to be consolidated by rodding, the measure is filled in ____ layers.
Correct Answer
three layers
ASTM C231- (Para 8.1.2)
Place the concrete in the measuring bowl in three layers of approximately equal volume.
Page 1 of 75
,Question 3
Q87. What method of consolidation must be used when the slump is greater than 75 mm [3 in.]?
Correct Answer
Rodding
ASTM C138- (Para 6.1)
Rod concretes with a slump greater than 75 mm [3 in.].
Question 4
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.
Page 2 of 75
,Question 5
Q127. Vibration of the concrete sample is not allowed when the slump of the concrete exceeds __________ .
Correct Answer
3 in. (75 mm)
ASTM C231- (Para 8.1.1)
Rod concretes with a slump greater than 3 in. (75 mm)
Question 6
Q63. When rodding the bottom layer, the tamping rod must be __________ to uniformly distribute the strokes.
Correct Answer
slightly inclined
ASTM C143- (Para 7.2)
For the bottom layer, this will necessitate inclining the rod slightly and making approximately half of the strokes near the
perimeter.
Page 3 of 75
, Question 7
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 8
Q101. ASTM C138 states, "the minimum capacity of the bucket depends on the maximum slump requirement."
A. True
B. False
Correct 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.
Page 4 of 75
Questions and Correct Answers
Question 1
Q37. The end of the temperature sensing portion of the temperature measuring device is submerged a minimum of
____mm [__in] into the freshly mixed concrete.
Correct Answer
a minimum of 75 mm [3 in.] into the freshly mixed concrete.
ASTM C1064- (Para 7.1)
Question 2
Q124. If the concrete sample is to be consolidated by rodding, the measure is filled in ____ layers.
Correct Answer
three layers
ASTM C231- (Para 8.1.2)
Place the concrete in the measuring bowl in three layers of approximately equal volume.
Page 1 of 75
,Question 3
Q87. What method of consolidation must be used when the slump is greater than 75 mm [3 in.]?
Correct Answer
Rodding
ASTM C138- (Para 6.1)
Rod concretes with a slump greater than 75 mm [3 in.].
Question 4
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.
Page 2 of 75
,Question 5
Q127. Vibration of the concrete sample is not allowed when the slump of the concrete exceeds __________ .
Correct Answer
3 in. (75 mm)
ASTM C231- (Para 8.1.1)
Rod concretes with a slump greater than 3 in. (75 mm)
Question 6
Q63. When rodding the bottom layer, the tamping rod must be __________ to uniformly distribute the strokes.
Correct Answer
slightly inclined
ASTM C143- (Para 7.2)
For the bottom layer, this will necessitate inclining the rod slightly and making approximately half of the strokes near the
perimeter.
Page 3 of 75
, Question 7
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 8
Q101. ASTM C138 states, "the minimum capacity of the bucket depends on the maximum slump requirement."
A. True
B. False
Correct 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.
Page 4 of 75
