ACI Concrete Field Testing Technician - Grade I Questions
With Complete Solutions
A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine temp. T/F
Correct Answers False
A max. temp. of freshly mixed concrete is specified in ASTM
C1064. T/F Correct Answers False
A plastic container can be used for the measure in this method.
T/F Correct Answers False
According to ASTM C1064, what is one reason to take the
temperature of concrete? Correct Answers to verify
conformance to a specific requirement.
After completing the strike-off procedure, what must be done
before weighing the measure and sample? Correct Answers
Clean excess concrete.
After consolidation of the final layer, and excess of concrete __
above the top of the measure is considered optimum. Correct
Answers 1/8"
After the final rodding, the sides of the slump mold should be
tapped lightly with the tamping rod. T/F Correct Answers
False
After the temperature of the concrete is read, what is then
required? Correct Answers Reporting of temp.
, Concrete samples from a truck mixer will be obtained before
any water or admixtures are added to the mixer at the job site.
T/F Correct Answers False
Each layer should fill approximately __ the volume of the mold.
Correct Answers 1/3
For a measure of .5 ft3, what is the required number of strokes
for tamping rod for consolidation of each layer? Correct
Answers 25
For use in the slump test, the end or both ends of the tamping
rod must be __. Correct Answers Rounded
How deep should the tamping rod penetrate into each layer?
Correct Answers Fully & 1" into previous layer.
How long must the temperature measuring device remain in the
freshly mixed concrete? Correct Answers At least 2 min., no
longer than 5 min.
How much time is allowed for lifting the slump mold? Correct
Answers 5 +/- 2 seconds
How much time is allowed to conduct the slump test from
beginning to the end? Correct Answers 2.5 min.
If rodding is the method of consolidation, the measure must be
filled in how many layers? Correct Answers 3
With Complete Solutions
A composite sample of concrete is required even if the only
purpose for obtaining the sample is to determine temp. T/F
Correct Answers False
A max. temp. of freshly mixed concrete is specified in ASTM
C1064. T/F Correct Answers False
A plastic container can be used for the measure in this method.
T/F Correct Answers False
According to ASTM C1064, what is one reason to take the
temperature of concrete? Correct Answers to verify
conformance to a specific requirement.
After completing the strike-off procedure, what must be done
before weighing the measure and sample? Correct Answers
Clean excess concrete.
After consolidation of the final layer, and excess of concrete __
above the top of the measure is considered optimum. Correct
Answers 1/8"
After the final rodding, the sides of the slump mold should be
tapped lightly with the tamping rod. T/F Correct Answers
False
After the temperature of the concrete is read, what is then
required? Correct Answers Reporting of temp.
, Concrete samples from a truck mixer will be obtained before
any water or admixtures are added to the mixer at the job site.
T/F Correct Answers False
Each layer should fill approximately __ the volume of the mold.
Correct Answers 1/3
For a measure of .5 ft3, what is the required number of strokes
for tamping rod for consolidation of each layer? Correct
Answers 25
For use in the slump test, the end or both ends of the tamping
rod must be __. Correct Answers Rounded
How deep should the tamping rod penetrate into each layer?
Correct Answers Fully & 1" into previous layer.
How long must the temperature measuring device remain in the
freshly mixed concrete? Correct Answers At least 2 min., no
longer than 5 min.
How much time is allowed for lifting the slump mold? Correct
Answers 5 +/- 2 seconds
How much time is allowed to conduct the slump test from
beginning to the end? Correct Answers 2.5 min.
If rodding is the method of consolidation, the measure must be
filled in how many layers? Correct Answers 3
