ACI- Concrete Field-Testing Technician -
Grade 1 {latest 2026 -2027 update}
questions and answers 100% correct
Air meter bowls used for this test must conform to Test Method_______ and be
calibrated for volume according to Test Method_______ . - correct answer Test Method
C231/C231M, Test Method C29/C29M.
ASTM C138- (Para 4.4)
When measuring bowls of air meters are used, they shall conform to the requirements
of Test Method C231/C231M,and shall be calibrated for volume as described in Test
Method C29/C29M.
The concrete sample must be obtained in accordance with what ASTM Practice? -
correct answer C172/C172M
,ASTM C138- (Para 5.1)
Obtain the sample of freshly mixed concrete in accordance.
with Practice C172/C172
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.].
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.
If rodding is the method of consolidation being used, the measure must be filled in
how many layers? - correct answer three layers
ASTM C138- (Para 6.3)
Rodding—Place the concrete in the measure in three layers of approximately equal
volume.
For a measure of 14 L [0.5 ft"), what is the required number of strokes of the tamping
rod for consolidation of each layer? - correct answer 25 strokes
, ASTM C138- (Para 6.3)
Rod each layer with 25 strokes of the tamping rod when nominal 14-L [0.5-ft3].
When rodding the middle and the top layers, the tamping rod should penetrate into the
layer below approximately_________ . - correct answer 25 mm [1 in.]
ASTM C138- (Para 6.3)
For each upper layer, allow the rod to penetrate through the layer being rodded and
into the layer below approximately 25 mm [1 in.].
Q92. If vibration is the method of consolidation, the measure must be filed in ______
approximately equal layers. - correct answer two
Grade 1 {latest 2026 -2027 update}
questions and answers 100% correct
Air meter bowls used for this test must conform to Test Method_______ and be
calibrated for volume according to Test Method_______ . - correct answer Test Method
C231/C231M, Test Method C29/C29M.
ASTM C138- (Para 4.4)
When measuring bowls of air meters are used, they shall conform to the requirements
of Test Method C231/C231M,and shall be calibrated for volume as described in Test
Method C29/C29M.
The concrete sample must be obtained in accordance with what ASTM Practice? -
correct answer C172/C172M
,ASTM C138- (Para 5.1)
Obtain the sample of freshly mixed concrete in accordance.
with Practice C172/C172
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.].
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.
If rodding is the method of consolidation being used, the measure must be filled in
how many layers? - correct answer three layers
ASTM C138- (Para 6.3)
Rodding—Place the concrete in the measure in three layers of approximately equal
volume.
For a measure of 14 L [0.5 ft"), what is the required number of strokes of the tamping
rod for consolidation of each layer? - correct answer 25 strokes
, ASTM C138- (Para 6.3)
Rod each layer with 25 strokes of the tamping rod when nominal 14-L [0.5-ft3].
When rodding the middle and the top layers, the tamping rod should penetrate into the
layer below approximately_________ . - correct answer 25 mm [1 in.]
ASTM C138- (Para 6.3)
For each upper layer, allow the rod to penetrate through the layer being rodded and
into the layer below approximately 25 mm [1 in.].
Q92. If vibration is the method of consolidation, the measure must be filed in ______
approximately equal layers. - correct answer two
