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ACI Concrete Field Testing Technician- Grade I
Latest Update 2024-2025 Actual Exam 150
Questions and 100% Verified Correct Answers
Guaranteed A+
A 6 by 12 in [150 mm by 300 mm] cylinder mold can be used for concrete containing
aggregate with particles not exceeding _____ in size, without the need for wet sieving
the concrete. - CORRECT ANSWER: 2 in. [50 mm]
A composite sample of concrete is required even if the only purpose for obtaining the
sample is to determine temperature. True of False? - CORRECT ANSWER: False
A mallet weighing ____ must be used to tap the sides of the bowl after rodding each
layer. - CORRECT ANSWER: 1.25 +- 0.50 lb. (600 +- 200 g)
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of
False? - CORRECT ANSWER: False
A plastic container can be used for the measure in this method. True or False? -
CORRECT ANSWER: False, measure must be steel or another suitable metal
According to ASTM C1064, what is one reason to take the temperature of concrete? -
CORRECT ANSWER: Verify conformance to a specified requirement for temperature of
concrete
After completing the strike-off procedure, what must be done before weighing the
measure and sample? - CORRECT ANSWER: Clean off any excess concrete
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 molding test specimens, you should wait two hours before moving them to the
location of initial storage. True or False? - CORRECT ANSWER: False; the specimens
must be moved immediately
After rodding each layer, what should be done to the measure before adding another
layer of concrete? - CORRECT ANSWER: Tap the sides of the measure smartly 10 to
15 times with the mallet
After the final rodding, the sides of the slump mold should should be tapped lightly with
the tamping rod. True or False? - CORRECT ANSWER: False
After the temperature of the concrete is read, what is required? - CORRECT ANSWER:
Reporting of temperature
Air meter bowls used for this test must conform to ASTM _____ and be calibrated for
volumee according to ASTM _____. - CORRECT ANSWER: C231, C29
ASTM Method gives standardized requirements for _____, _____, _____, and _____, of
test specimens. - CORRECT ANSWER: Making, curing, protecting, transporting
At the end of the procedure, the air meter is _____. - CORRECT ANSWER:
Disassembled and its contents examined
Concrete mixtures with specified strengths of 6000 psi [40 MPa] or greater shall have
an initial curing temperature between __________. - CORRECT ANSWER: 68 and 78
degrees F [20 and 26 C]
Concrete samples from a truck mixer must be obtained before any water or admixtures
are added to the mixer at the job site. True or False? - CORRECT ANSWER: False
Cylinders made for the purpose of determining when a structure may be put into service
shall be removed from the mold __________. - CORRECT ANSWER: At the time of the
removal of formwork
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