ACI Concrete Field Testing Technician- Grade I Exam Newest
2026/2027 Questions and Correct Detailed Answers Already
Graded A+
What method of consolidation must be used when the slump is less than 1 in. (25
mm]? - CORRECT ANSWER-Vibration
If rodding is the method of consolidation being used, the measure must be filled
in how many layers? - CORRECT ANSWER-3
For a measure of 0.5 ft^3 [14 L], what is the required number of strokes of the
tamping rod for consolidation of each layer? - CORRECT ANSWER-25
When rodding the middle and the top layers, the tamping rod should penetrate
into the layer below approximately _____. - CORRECT ANSWER-1 in. [25 mm]
If vibration is the method of consolidation, the measure must be filled in _____
approximately equal layers. - CORRECT ANSWER-2
,If, after consolidation of the final layer, the concrete level is 1/2 in. (13 mm) above
the top of the measure, what should be done? - CORRECT ANSWER-Remove a
representative portion of the excess concrete with a trowel or scoop
After consolidation of the final layer, an excess of concrete ____ above the top of
the measure is considered optimum. - CORRECT ANSWER-1/8 in. [3 mm]
After completing the strike-off procedure, what must be done before weighing
the measure and sample? - CORRECT ANSWER-Clean off any excess concrete
The pressure method of determining air content can be used on concrete
containing _____ _____ aggregate. - CORRECT ANSWER-Relatively Dense
The pressure method of determining air content cannot be used on concrete
containing the following types of aggregates, _____, _____, _____. - CORRECT
ANSWER-Lightweight, air-cooled blast furnace slag, or aggregates of high
porosity
What is the minimum allowable capacity of the measuring bowl used in this test
method? - CORRECT ANSWER-6 L (0.20 ft^3)
, What are the required characteristics of the tamping rod used in this test
method? - CORRECT ANSWER-Round, straight steel rod, with a 16 mm [5/8 in.]
+- 2 mm [1/16 in.] diameter, length at least 100 mm [4 in.] greater than the depth
of the measuring bowl, but not greater than 600 mm [24 in.] in overall length,
with the tamping end rounded to a hemispherical tip of the same diameter as the
rod.
What is the specified size of the mallet required for this test method when the
measuring bowl has the capacity of 14 L [0.5 ft^3] or less? - CORRECT
ANSWER-0.60 +- 0.25 kg [1.25 +- 0.50 lb.]
The sample of concrete used for this test is to be obtained in accordance with
what ASTM Standard? - CORRECT ANSWER-C172
The maximum size aggregate allowed for this test method is _____. - CORRECT
ANSWER-50 mm (2 in.)
If the concrete contains aggregate larger than the maximum allowed for this test,
the sample must be _____. - CORRECT ANSWER-Wet sieved over a 1 1/2 in.
(37.5 mm) sieve
2026/2027 Questions and Correct Detailed Answers Already
Graded A+
What method of consolidation must be used when the slump is less than 1 in. (25
mm]? - CORRECT ANSWER-Vibration
If rodding is the method of consolidation being used, the measure must be filled
in how many layers? - CORRECT ANSWER-3
For a measure of 0.5 ft^3 [14 L], what is the required number of strokes of the
tamping rod for consolidation of each layer? - CORRECT ANSWER-25
When rodding the middle and the top layers, the tamping rod should penetrate
into the layer below approximately _____. - CORRECT ANSWER-1 in. [25 mm]
If vibration is the method of consolidation, the measure must be filled in _____
approximately equal layers. - CORRECT ANSWER-2
,If, after consolidation of the final layer, the concrete level is 1/2 in. (13 mm) above
the top of the measure, what should be done? - CORRECT ANSWER-Remove a
representative portion of the excess concrete with a trowel or scoop
After consolidation of the final layer, an excess of concrete ____ above the top of
the measure is considered optimum. - CORRECT ANSWER-1/8 in. [3 mm]
After completing the strike-off procedure, what must be done before weighing
the measure and sample? - CORRECT ANSWER-Clean off any excess concrete
The pressure method of determining air content can be used on concrete
containing _____ _____ aggregate. - CORRECT ANSWER-Relatively Dense
The pressure method of determining air content cannot be used on concrete
containing the following types of aggregates, _____, _____, _____. - CORRECT
ANSWER-Lightweight, air-cooled blast furnace slag, or aggregates of high
porosity
What is the minimum allowable capacity of the measuring bowl used in this test
method? - CORRECT ANSWER-6 L (0.20 ft^3)
, What are the required characteristics of the tamping rod used in this test
method? - CORRECT ANSWER-Round, straight steel rod, with a 16 mm [5/8 in.]
+- 2 mm [1/16 in.] diameter, length at least 100 mm [4 in.] greater than the depth
of the measuring bowl, but not greater than 600 mm [24 in.] in overall length,
with the tamping end rounded to a hemispherical tip of the same diameter as the
rod.
What is the specified size of the mallet required for this test method when the
measuring bowl has the capacity of 14 L [0.5 ft^3] or less? - CORRECT
ANSWER-0.60 +- 0.25 kg [1.25 +- 0.50 lb.]
The sample of concrete used for this test is to be obtained in accordance with
what ASTM Standard? - CORRECT ANSWER-C172
The maximum size aggregate allowed for this test method is _____. - CORRECT
ANSWER-50 mm (2 in.)
If the concrete contains aggregate larger than the maximum allowed for this test,
the sample must be _____. - CORRECT ANSWER-Wet sieved over a 1 1/2 in.
(37.5 mm) sieve
