ACI CONCRETE FIELD TESTING TECHNICIAN
GRADE 1 FINAL EXAMINATION TEST 2026
QUESTIONS AND SOLUTIONS 100% CORRECT
● The concrete thermometer must have at least
__________________________. Answer: 3in of cover in all directions
● What should you do after placing the thermometer in the concrete?
Answer: Press the concrete around the thermometer to prevent ambient
air temperature from affecting the reading
● What is the minimum time the thermometer must remain in the
concrete? Answer: 2min
● What is the maximum time the thermometer may remain in the
concrete?(for aggregate less than 3in) Answer: 5min
● Should you remove the thermometer when taking a reading? Answer:
No
● How do you report the temperature taken? Answer: To the nearest 1
degree
, ● If the aggregate size is larger than 3in how long might it take for
temperature to stabilize? Answer: Up to 20min
● How often must thermometers be calibrated? Answer: Every 12
months
● What is the required range of thermometers used to test concrete?
Answer: 30 to 120 degrees and read within 1 degree
● Should you take a concrete sample before or after all mix and job
water has been added? Answer: After
● What should you do to your container before obtaining a concrete
sample? Answer: Dampen container
● Sampling method for composite sample? Answer: Minimum two
samples from middle portion of the load
● What is the maximum time limit between obtaining the first and final
portions of the composite mixture? Answer: 15min
● How do you obtain the composite sample from a concrete truck?
Answer: Divert the entire discharge stream into sample container
GRADE 1 FINAL EXAMINATION TEST 2026
QUESTIONS AND SOLUTIONS 100% CORRECT
● The concrete thermometer must have at least
__________________________. Answer: 3in of cover in all directions
● What should you do after placing the thermometer in the concrete?
Answer: Press the concrete around the thermometer to prevent ambient
air temperature from affecting the reading
● What is the minimum time the thermometer must remain in the
concrete? Answer: 2min
● What is the maximum time the thermometer may remain in the
concrete?(for aggregate less than 3in) Answer: 5min
● Should you remove the thermometer when taking a reading? Answer:
No
● How do you report the temperature taken? Answer: To the nearest 1
degree
, ● If the aggregate size is larger than 3in how long might it take for
temperature to stabilize? Answer: Up to 20min
● How often must thermometers be calibrated? Answer: Every 12
months
● What is the required range of thermometers used to test concrete?
Answer: 30 to 120 degrees and read within 1 degree
● Should you take a concrete sample before or after all mix and job
water has been added? Answer: After
● What should you do to your container before obtaining a concrete
sample? Answer: Dampen container
● Sampling method for composite sample? Answer: Minimum two
samples from middle portion of the load
● What is the maximum time limit between obtaining the first and final
portions of the composite mixture? Answer: 15min
● How do you obtain the composite sample from a concrete truck?
Answer: Divert the entire discharge stream into sample container
