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ACI Concrete Field Testing Technician-
Grade I Questions with Detailed Verified
Answers
The sensor of the temperature measuring device shall be submerged a
minimum of _____ in. [_____mm] into the freshly mixed concrete. Ans:
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 _____. Ans: 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 _____. Ans: Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or
False? Ans: True
The temperature of concrete may be measured in a wall form. True of
False Ans: True
A composite sample of concrete is required even if the only purpose for
obtaining the sample is to determine temperature. True of False? Ans:
False
What must be done to the sample container prior to sampling the
concrete? Ans: Dampen (with water)
What must be done to the concrete surrounding the temperature
measuring device after the device is submerged in the fresh concrete.
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Ans: 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? Ans: At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? Ans:
Reporting of temperature
The temperature of concrete is reported to the nearest _____ degrees F
[_____ C] Ans: 1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of
concrete? Ans: 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? Ans: False
The sample of concrete used for temperature determination must be
rodded 25 times. True or False? Ans: False
Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. Ans: Compliance
This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. Ans: 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. Ans: 15
Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? Ans: 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. Ans: 5
ACI Concrete Field Testing Technician-
Grade I Questions with Detailed Verified
Answers
The sensor of the temperature measuring device shall be submerged a
minimum of _____ in. [_____mm] into the freshly mixed concrete. Ans:
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 _____. Ans: 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 _____. Ans: Annually, accuracy
The temperature of concrete may be measured in a wheelbarrow. True or
False? Ans: True
The temperature of concrete may be measured in a wall form. True of
False Ans: True
A composite sample of concrete is required even if the only purpose for
obtaining the sample is to determine temperature. True of False? Ans:
False
What must be done to the sample container prior to sampling the
concrete? Ans: Dampen (with water)
What must be done to the concrete surrounding the temperature
measuring device after the device is submerged in the fresh concrete.
, Page | 2
Ans: 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? Ans: At least 2 minutes but not more than 5 minutes
After the temperature of the concrete is read, what is required? Ans:
Reporting of temperature
The temperature of concrete is reported to the nearest _____ degrees F
[_____ C] Ans: 1 degree F [0.5 C]
According to ASTM C1064, what is one reason to take the temperature of
concrete? Ans: 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? Ans: False
The sample of concrete used for temperature determination must be
rodded 25 times. True or False? Ans: False
Sampling by this method is required when tests are to be made to
determine _____ with specification requirements. Ans: Compliance
This method covers sampling from four types of mixtures which are
_____, _____, _____, and _____. Ans: 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. Ans: 15
Portions of a composite sample shall be thoroughly remixed bfore
beginning tests on the sample. True of False? Ans: 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. Ans: 5
