ACI Written Exam Questions with Correct
Answers 2024/2025
The sensor of the temperature measureing device shall be submerged a minimum of ____ in - correct
answer 3 (75mm)
The temperature measureing device shall have a capacity of measuring temperature of freshly mixed
conrcrete to +-_____ degrees F throught a range of _____ - correct answer 1(.5 degrees C), 30-120 (0-50
degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a question of _____ -
correct answer annually, accuracy
The temp of concrete may be measured in a wheelbarrow - correct answer true
the temp of concrete may be measured in a wall form - correct answer true
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temp. - correct answer false
What must be done to the sample container prior to sampling the concrete - correct answer dampen
(with water)
what must be done to the concrete surrounding the temp measuring device after the device has
submerged - correct answer Press concrete around measuring device
How long must the temp device remain in the concrete - correct answer at least 2 minutes (but no more
than 5)
After temp of concrete is read, what then is required - correct answer reporting of temp
the temp of concrete to be measured to the nearest ____degree F - correct answer 1 (.5 degree C)
, According to the ASTM C1064 what is one reason to take the temp of concrete - correct answer verify
conformance to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 - correct answer False
The sample of concrete used for temp determination must be rodded 25 times - correct answer False
Sampling by this method is required when tests are to be made to determine ____ with specification
requirements - correct answer compliance
The method covers sampling from four types of mixers which are _____, _____, ____, and _______ -
correct answer stationary mixes, 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 - correct answer 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample -
correct answer True
The maximum elapsed time allowed between obtaining the final portion of the composite sample and
beginning the tests for slump, temp, and air content is ______ minutes - correct answer 5
the molding of strength test specimens shall begin within ____ minutes after fabricating the composite
sample - correct answer 15
The concrete sample must be protected from contamination and ____ - correct answer rapid
evaporation
The minimum size sample test specimen is - correct answer 28 L (1ft^3)
when sampling from a stationary mixer the batch must be sampled at _____ or more regularly spaced
intervals during discharge of the middle portion of the batch - correct answer 2
Answers 2024/2025
The sensor of the temperature measureing device shall be submerged a minimum of ____ in - correct
answer 3 (75mm)
The temperature measureing device shall have a capacity of measuring temperature of freshly mixed
conrcrete to +-_____ degrees F throught a range of _____ - correct answer 1(.5 degrees C), 30-120 (0-50
degrees C)
The temperature measuring device shall be calibrated____, or whenever there is a question of _____ -
correct answer annually, accuracy
The temp of concrete may be measured in a wheelbarrow - correct answer true
the temp of concrete may be measured in a wall form - correct answer true
A composite sample of concrete is required even if the only purpose for obtaining the sample is to
determine temp. - correct answer false
What must be done to the sample container prior to sampling the concrete - correct answer dampen
(with water)
what must be done to the concrete surrounding the temp measuring device after the device has
submerged - correct answer Press concrete around measuring device
How long must the temp device remain in the concrete - correct answer at least 2 minutes (but no more
than 5)
After temp of concrete is read, what then is required - correct answer reporting of temp
the temp of concrete to be measured to the nearest ____degree F - correct answer 1 (.5 degree C)
, According to the ASTM C1064 what is one reason to take the temp of concrete - correct answer verify
conformance to a specified requirement for temp
A max temp of concrete is specified in ASTM C1064 - correct answer False
The sample of concrete used for temp determination must be rodded 25 times - correct answer False
Sampling by this method is required when tests are to be made to determine ____ with specification
requirements - correct answer compliance
The method covers sampling from four types of mixers which are _____, _____, ____, and _______ -
correct answer stationary mixes, 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 - correct answer 15
Portions of a composite sample shall be thoroughly remixed before beginning tests on the sample -
correct answer True
The maximum elapsed time allowed between obtaining the final portion of the composite sample and
beginning the tests for slump, temp, and air content is ______ minutes - correct answer 5
the molding of strength test specimens shall begin within ____ minutes after fabricating the composite
sample - correct answer 15
The concrete sample must be protected from contamination and ____ - correct answer rapid
evaporation
The minimum size sample test specimen is - correct answer 28 L (1ft^3)
when sampling from a stationary mixer the batch must be sampled at _____ or more regularly spaced
intervals during discharge of the middle portion of the batch - correct answer 2
