ACI Field Grade 1 Testing QUESTIONS
AND CORRECT ANSWERS
It is acceptable to measure the temperature of freshly mixed concrete in the forms
provide :
A. The sensor of the temperature measuring device has at least 3 " of cover in all
directions.
B. The concrete has been properly consolidated.
C. The sensor of the temperature measuring device is made of metal.
D. The concrete has been wet sieved. - Answer - A. The sensor of the temperature
measuring device has at least 3 " of cover in all directions.
The temperature measuring devices shall be capable of accurately measuring the
temperature of freshly mixed concrete to 1 ° F throughout a range of
________________.
A. 20 - 100 ° F
B. 45 - 95 ° F
C. 30 - 120 ° F
D. 50 - 200 ° F - Answer - C. 30 - 120 ° F
Is the following statement true or false?
Composite samples are required even if the only purpose for obtaining the sample is to
determine temperature.
A. True
B. False - Answer - B. False
The temperature measuring device is left in the freshly mixed concrete for at least
__________ but not more than 5 minutes.
A. 10 seconds
B. 30 seconds
C. 1 minute
D. 2 minutes - Answer - D. 2 mintues
Is the following statement true or false?
Test Method C1064/C1064 specifies a maximum temperature of freshly mixed concrete.
A. True
B. False - Answer - B. False
, The elapsed time between obtaining the first and final portion of a composite sample
shall not exceed___________.
A. 15 minutes
B. 20 minutes
C. 30 minutes
D. 60 minutes - Answer - A. 15 minutes
Is the following statement true or false?
Individual samples shall be combined and remixed with a shovel the minimum amount
necessary to ensure uniformity.
A. True
B. False - Answer - A. True
The following test must be started within 5 minutes after obtaining the final portion of the
composite sample:
A. Slump
B. Temperature
C. Air content
D. All of the above - Answer - D. All of the above
The concrete sample must be protect from:
A. Contamination
B. Evaporation
C. A & B
D. None of the above - Answer - C. A & B
When strength specimens are to be made, the minimum sample size is _________.
A. 0.25 ft ³
B. 0.50 ft. ³
C. 1.0 ft. ³
D. 2.0 ft. ³ - Answer - C. 1.0 ft. ³
Portions of the composite should be taken from the _________ of the batch discharge.
A. Beginning
B. Middle
C. End
D. All of the above - Answer - B. Middle
AND CORRECT ANSWERS
It is acceptable to measure the temperature of freshly mixed concrete in the forms
provide :
A. The sensor of the temperature measuring device has at least 3 " of cover in all
directions.
B. The concrete has been properly consolidated.
C. The sensor of the temperature measuring device is made of metal.
D. The concrete has been wet sieved. - Answer - A. The sensor of the temperature
measuring device has at least 3 " of cover in all directions.
The temperature measuring devices shall be capable of accurately measuring the
temperature of freshly mixed concrete to 1 ° F throughout a range of
________________.
A. 20 - 100 ° F
B. 45 - 95 ° F
C. 30 - 120 ° F
D. 50 - 200 ° F - Answer - C. 30 - 120 ° F
Is the following statement true or false?
Composite samples are required even if the only purpose for obtaining the sample is to
determine temperature.
A. True
B. False - Answer - B. False
The temperature measuring device is left in the freshly mixed concrete for at least
__________ but not more than 5 minutes.
A. 10 seconds
B. 30 seconds
C. 1 minute
D. 2 minutes - Answer - D. 2 mintues
Is the following statement true or false?
Test Method C1064/C1064 specifies a maximum temperature of freshly mixed concrete.
A. True
B. False - Answer - B. False
, The elapsed time between obtaining the first and final portion of a composite sample
shall not exceed___________.
A. 15 minutes
B. 20 minutes
C. 30 minutes
D. 60 minutes - Answer - A. 15 minutes
Is the following statement true or false?
Individual samples shall be combined and remixed with a shovel the minimum amount
necessary to ensure uniformity.
A. True
B. False - Answer - A. True
The following test must be started within 5 minutes after obtaining the final portion of the
composite sample:
A. Slump
B. Temperature
C. Air content
D. All of the above - Answer - D. All of the above
The concrete sample must be protect from:
A. Contamination
B. Evaporation
C. A & B
D. None of the above - Answer - C. A & B
When strength specimens are to be made, the minimum sample size is _________.
A. 0.25 ft ³
B. 0.50 ft. ³
C. 1.0 ft. ³
D. 2.0 ft. ³ - Answer - C. 1.0 ft. ³
Portions of the composite should be taken from the _________ of the batch discharge.
A. Beginning
B. Middle
C. End
D. All of the above - Answer - B. Middle
