ACI Concrete Field-Testing Technician- Grade I Study Guide 100% Correct Answers Verified Latest 2024 Version
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ACI
ACI Concrete Field-Testing Technician- Grade I
Study Guide | 100% Correct Answers | Verified |
Latest 2024 Version
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - 3 in. [75 mm]
The temperature measuring devic...
ACI Concrete Field-Testing Technician- Grade I
Study Guide | 100% Correct Answers | Verified |
Latest 2024 Version
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____mm] into the freshly mixed concrete. - ✔✔3 in. [75 mm]
The temperature measuring device shall have a capacity of measuring temperature of freshly mixed
concrete to +- _____ degrees F [+- _____ C] throughout a range of _____. - ✔✔1 degree F [0.5 C], 30
degrees F to 120 F [0 C to 50 C]
The temperature measuring device shall be calibrated _____, or whenever there is a question of _____. -
✔✔Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or False? - ✔✔True
The temperature of concrete may be measured in a wall form. True of False - ✔✔True
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temperature. True of False? - ✔✔False
What must be done to the sample container prior to sampling the concrete? - ✔✔Dampen (with water)
What must be done to the concrete surrounding the temperature measuring device after the device is
submerged in the fresh concrete. - ✔✔Gently press the concrete around the temperature measuring
device at the surface of the concrete
How long must the temperature measuring device remain in the freshly mixed concrete? - ✔✔At least 2
minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? - ✔✔Reporting of temperature
, The temperature of concrete is reported to the nearest _____ degrees F [_____ C] - ✔✔1 degree F [0.5
C]
According to ASTM C1064, what is one reason to take the temperature of concrete? - ✔✔Verify
conformance to a specified requirement for temperature of concrete
A maximum temperature of freshly mixed concrete is specified in ASTM C1064. True of False? - ✔✔False
The sample of concrete used for temperature determination must be rodded 25 times. True or False? -
✔✔False
Sampling by this method is required when tests are to be made to determine _____ with specification
requirements. - ✔✔Compliance
This method covers sampling from four types of mixtures which are _____, _____, _____, and _____. -
✔✔Stationary mixers, paving mixers, revolving drum mixers, and open top mixers
The maximum allowable time between obtaining the first and final portions of a composite sample is
_____ minutes. - ✔✔15
Portions of a composite sample shall be thoroughly remixed bfore beginning tests on the sample. True of
False? - ✔✔True
The maximum elapsed time allowed between obtaining the final portion of the composite sample and
beginning the tests for slump, temperature, and air content is _____ minutes. - ✔✔5
The molding of strength test specimens shall begin within _____ minutes after fabricating the composite
sample. - ✔✔15
The concrete sample must be protected from contamination and _____. - ✔✔Rapid evaporation
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