ACI CONCRETE FIELD TESTING TECHNICIAN -
GRADE I EXAM QUESTIONS WITH CORRECT
ANSWERS
INTRODUCTION .
This comprehensive study guide is designed for candidates preparing for the American
Concrete Institute (ACI) Concrete Field Testing Technician - Grade I Certification
Examination for the 2025/2026 testing cycle. The certification is recognized internationally and
validates an individual's ability to properly perform and record the results of seven basic field
tests on freshly mixed concrete .
Required ASTM Standards Covered:
Standard Title
ASTM C172 / C172M Sampling Freshly Mixed Concrete
ASTM C1064 / C1064M Temperature of Freshly Mixed Concrete
ASTM C143 / C143M Slump of Hydraulic-Cement Concrete
ASTM C138 / C138M Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
ASTM C231 / C231M Air Content of Freshly Mixed Concrete by the Pressure Method
ASTM C173 / C173M Air Content of Freshly Mixed Concrete by the Volumetric Method
ASTM C31 / C31M Making and Curing Concrete Test Specimens in the Field
Examination Requirements:
, • Written Exam: 1 hour, closed book, 55 multiple-choice questions
• Passing Criteria: Minimum 60% on each ASTM standard AND 70% overall
• Performance Exam: Requires demonstration of six ASTM tests plus verbal description
of sampling procedures
• Recertification: Required every 5 years
Required Study Materials:
• ACI CP-1 Technician Workbook for Concrete Field Testing Technician - Grade I
SECTION 1: TEMPERATURE OF FRESHLY MIXED
CONCRETE (ASTM C1064)
Q1
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____ mm] into the freshly mixed concrete.
Answer: 3 in. [75 mm]
Rationale: ASTM C1064, Para 7.1 specifies this minimum submergence depth to ensure
accurate temperature reading of the concrete mass .
Q2
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to ± _____ °F [± _____ °C] throughout a range of _____.
Answer: 1 °F [0.5 °C], 30 °F to 120 °F [0 °C to 50 °C]
, Rationale: ASTM C1064, Para 6.1 specifies the required accuracy and range for temperature
measuring devices used in this test method .
Q3
The temperature measuring device shall be calibrated _____, or whenever there is a question of
_____.
Answer: Annually, accuracy
Rationale: ASTM C1064, Para 6.2 requires annual calibration to maintain reliability.
Documentation of calibration is essential .
Q4
The temperature of concrete may be measured in a wheelbarrow. True or False?
Answer: True
Rationale: ASTM C1064, Para 4.2 permits temperature measurement in a wheelbarrow as long
as the sample is representative .
Q5
The temperature of concrete may be measured in a wall form. True or False?
Answer: True
GRADE I EXAM QUESTIONS WITH CORRECT
ANSWERS
INTRODUCTION .
This comprehensive study guide is designed for candidates preparing for the American
Concrete Institute (ACI) Concrete Field Testing Technician - Grade I Certification
Examination for the 2025/2026 testing cycle. The certification is recognized internationally and
validates an individual's ability to properly perform and record the results of seven basic field
tests on freshly mixed concrete .
Required ASTM Standards Covered:
Standard Title
ASTM C172 / C172M Sampling Freshly Mixed Concrete
ASTM C1064 / C1064M Temperature of Freshly Mixed Concrete
ASTM C143 / C143M Slump of Hydraulic-Cement Concrete
ASTM C138 / C138M Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
ASTM C231 / C231M Air Content of Freshly Mixed Concrete by the Pressure Method
ASTM C173 / C173M Air Content of Freshly Mixed Concrete by the Volumetric Method
ASTM C31 / C31M Making and Curing Concrete Test Specimens in the Field
Examination Requirements:
, • Written Exam: 1 hour, closed book, 55 multiple-choice questions
• Passing Criteria: Minimum 60% on each ASTM standard AND 70% overall
• Performance Exam: Requires demonstration of six ASTM tests plus verbal description
of sampling procedures
• Recertification: Required every 5 years
Required Study Materials:
• ACI CP-1 Technician Workbook for Concrete Field Testing Technician - Grade I
SECTION 1: TEMPERATURE OF FRESHLY MIXED
CONCRETE (ASTM C1064)
Q1
The sensor of the temperature measuring device shall be submerged a minimum of _____ in.
[_____ mm] into the freshly mixed concrete.
Answer: 3 in. [75 mm]
Rationale: ASTM C1064, Para 7.1 specifies this minimum submergence depth to ensure
accurate temperature reading of the concrete mass .
Q2
The temperature measuring device shall have a capacity of measuring temperature of freshly
mixed concrete to ± _____ °F [± _____ °C] throughout a range of _____.
Answer: 1 °F [0.5 °C], 30 °F to 120 °F [0 °C to 50 °C]
, Rationale: ASTM C1064, Para 6.1 specifies the required accuracy and range for temperature
measuring devices used in this test method .
Q3
The temperature measuring device shall be calibrated _____, or whenever there is a question of
_____.
Answer: Annually, accuracy
Rationale: ASTM C1064, Para 6.2 requires annual calibration to maintain reliability.
Documentation of calibration is essential .
Q4
The temperature of concrete may be measured in a wheelbarrow. True or False?
Answer: True
Rationale: ASTM C1064, Para 4.2 permits temperature measurement in a wheelbarrow as long
as the sample is representative .
Q5
The temperature of concrete may be measured in a wall form. True or False?
Answer: True
