ACI CONCRETE FIELD TESTING TECHNICIAN
GRADE I COMPREHENSIVE EXAM 2026 FULL
QUESTIONS AND SOLUTIONS GRADED A+
◉ C1064/C1064M Temperature
The temperature measuring device shall be capable of accurately
measuring the temperature of freshly mixed concrete to _____ degree F
[_____C] throughout a range of __-___ degrees F [_____C]. Answer: 1
degree F [0.5 C], 30-120 degrees F [0-50 C]
◉ C1064/C1064M Temperature
The temperature measuring device shall be calibrated ________, or
whenever there is a question of ________. Answer: Annually, accuracy
◉ C1064/C1064M Temperature
The temperature of concrete may be measured in a wheelbarrow. True or
False? Answer: True
,◉ C1064/C1064M Temperature
The temperature of concrete may be measured in a wall form. True of
False? Answer: True
◉ C1064/C1064M Temperature
A composite sample of concrete is required even if the only purpose for
obtaining the sample is to determine temperature. True of False?
Answer: False
◉ C1064/C1064M Temperature
What must be done to the sample container prior to sampling the
concrete? Answer: Dampen (with water)
◉ C1064/C1064M Temperature
What must be done to the concrete surrounding the temperature
measuring device after the device is submerged in the fresh concrete.
Answer: Gently press the concrete around the temperature measuring
device at the surface of the concrete
◉ C1064/C1064M Temperature
,How long must the temperature measuring device remain in the freshly
mixed concrete? Answer: At least 2 minutes but not more than 5 minutes
◉ C1064/C1064M Temperature
After the temperature of the concrete is read, what is then required?
Answer: Reporting of temperature
◉ C1064/C1064M Temperature
The temperature of concrete is reported to the nearest _____ degrees F
[_____ C]. Answer: 1 degree F [0.5 C]
◉ C1064/C1064M Temperature
According to ASTM C1064, what is one reason to take the temperature
of concrete? Answer: Verify conformance to a specified requirement for
temperature of concrete
◉ C1064/C1064M Temperature
A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True of False? Answer: False
, ◉ C1064/C1064M Temperature
The sample of concrete used for temperature determination must be
rodded 25 times. True or False? Answer: False
◉ C172/C172M Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to
determine __________ with specification requirements. Answer:
Compliance
◉ C172/C172M Sampling Freshly Mixed Concrete
This practice covers sampling from five types of equipment, which are
_________________, _____________, ___________________,
_________________ and _______________. Answer: Stationary
mixers, paving mixers, revolving drum mixers, continuous mixers, and
open top mixers
◉ C172/C172M Sampling Freshly Mixed Concrete
The elapsed time between obtaining the first and final portions of a
composite sample shall not exceed __________. Answer: 15 minutes
GRADE I COMPREHENSIVE EXAM 2026 FULL
QUESTIONS AND SOLUTIONS GRADED A+
◉ C1064/C1064M Temperature
The temperature measuring device shall be capable of accurately
measuring the temperature of freshly mixed concrete to _____ degree F
[_____C] throughout a range of __-___ degrees F [_____C]. Answer: 1
degree F [0.5 C], 30-120 degrees F [0-50 C]
◉ C1064/C1064M Temperature
The temperature measuring device shall be calibrated ________, or
whenever there is a question of ________. Answer: Annually, accuracy
◉ C1064/C1064M Temperature
The temperature of concrete may be measured in a wheelbarrow. True or
False? Answer: True
,◉ C1064/C1064M Temperature
The temperature of concrete may be measured in a wall form. True of
False? Answer: True
◉ C1064/C1064M Temperature
A composite sample of concrete is required even if the only purpose for
obtaining the sample is to determine temperature. True of False?
Answer: False
◉ C1064/C1064M Temperature
What must be done to the sample container prior to sampling the
concrete? Answer: Dampen (with water)
◉ C1064/C1064M Temperature
What must be done to the concrete surrounding the temperature
measuring device after the device is submerged in the fresh concrete.
Answer: Gently press the concrete around the temperature measuring
device at the surface of the concrete
◉ C1064/C1064M Temperature
,How long must the temperature measuring device remain in the freshly
mixed concrete? Answer: At least 2 minutes but not more than 5 minutes
◉ C1064/C1064M Temperature
After the temperature of the concrete is read, what is then required?
Answer: Reporting of temperature
◉ C1064/C1064M Temperature
The temperature of concrete is reported to the nearest _____ degrees F
[_____ C]. Answer: 1 degree F [0.5 C]
◉ C1064/C1064M Temperature
According to ASTM C1064, what is one reason to take the temperature
of concrete? Answer: Verify conformance to a specified requirement for
temperature of concrete
◉ C1064/C1064M Temperature
A maximum temperature of freshly mixed concrete is specified in
ASTM C1064. True of False? Answer: False
, ◉ C1064/C1064M Temperature
The sample of concrete used for temperature determination must be
rodded 25 times. True or False? Answer: False
◉ C172/C172M Sampling Freshly Mixed Concrete
Sampling by this method is required when tests are to be made to
determine __________ with specification requirements. Answer:
Compliance
◉ C172/C172M Sampling Freshly Mixed Concrete
This practice covers sampling from five types of equipment, which are
_________________, _____________, ___________________,
_________________ and _______________. Answer: Stationary
mixers, paving mixers, revolving drum mixers, continuous mixers, and
open top mixers
◉ C172/C172M Sampling Freshly Mixed Concrete
The elapsed time between obtaining the first and final portions of a
composite sample shall not exceed __________. Answer: 15 minutes
