ACI Concrete Field Testing Technician Grade 1 (CP-1) – 150
Practice Exam Questions & Answers Complete Study Guide
– Latest 2027/2028 | 100% Verified
SUMMARY TABLE
Section Questions Key Topics Covered
ASTM C1064 – Temperature 1-15 Temperature measurement, device requirements,
calibration, procedure
ASTM C172 – Sampling 16-40 Composite sampling, time limits, mixer types, wet sieving
ASTM C143 – Slump 41-65 Slump test procedure, rodding, layers, measurement
ASTM C138 – Density/Unit 66-90 Density calculation, rodding, vibration, strike-off
Weight
ASTM C231 – Air Content 91-115 Pressure method, aggregate types, consolidation, rodding
(Pressure)
ASTM C173 – Air Content 116-130 Volumetric method, alcohol, all aggregate types
(Volumetric)
ASTM C31 – Making & Curing 131-150 Specimen preparation, rodding, vibration, curing methods
TOTAL 150 Complete ACI CP-1 Exam Coverage
Questions
This comprehensive document contains 150 practice questions for the ACI Concrete Field
Testing Technician Grade 1 (CP-1) Certification Exam. The questions are based on the
required ASTM standards: C1064/C1064M (Temperature), C172/C172M (Sampling),
C143/C143M (Slump), C138/C138M (Density/Unit Weight), C231/C231M (Pressure Air
Content), C173/C173M (Volumetric Air Content), and C31/C31M (Making and Curing
Cylinders) . Each answer includes the correct option in bold with a detailed rationale .
,SECTION 1: ASTM C1064 – TEMPERATURE OF FRESHLY MIXED CONCRETE
(Questions 1–25)
1. What is the standard test method for measuring the temperature of freshly mixed
hydraulic-cement concrete?
A) ASTM C172
B) ASTM C1064
C) ASTM C143
D) ASTM C138
Answer: B
ASTM C1064 is the Standard Test Method for Temperature of Freshly Mixed Hydraulic-
Cement Concrete .
2. The sensor of the temperature measuring device shall be submerged a minimum of
how many inches into the freshly mixed concrete?
A) 1 inch
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C
The temperature measuring device sensor must be submerged a minimum of 3 inches (75
mm) into the freshly mixed concrete to ensure an accurate reading .
3. The temperature measuring device shall have a capacity of measuring temperature
to ± ______ °F throughout a range of ____________.
,A) 2°F, 20°F to 100°F
B) 1°F, 30°F to 120°F
C) 0.5°F, 40°F to 140°F
D) 1°F, 50°F to 150°F
Answer: B
The device must measure temperature to an accuracy of ±1°F (±0.5°C) throughout a range
of 30°F to 120°F .
4. The temperature measuring device shall be calibrated _______, or whenever there
is a question of _______.
A) Monthly, calibration
B) Annually, accuracy
C) Semi-annually, precision
D) Quarterly, reliability
Answer: B
The temperature measuring device must be verified annually or whenever there is a
question of accuracy .
5. The temperature of concrete may be measured in a wheelbarrow. True or False?
A) True
B) False
Answer: A
Temperature may be measured in a wheelbarrow, provided the concrete is properly
sampled and protected from environmental conditions .
6. The temperature of concrete may be measured in a wall form. True or False?
, A) True
B) False
Answer: A
Temperature may be measured in a wall form, but the sample must be representative of the
batch .
7. What must be done to the sample container prior to sampling the concrete?
A) Dry it thoroughly
B) Dampen with water
C) Heat it
D) Coat with oil
Answer: B
The sample container should be dampened with water before sampling to prevent
absorption of water from the concrete, which could affect the sample .
8. What must be done to the concrete surrounding the temperature measuring device
after the device is submerged in the fresh concrete?
A) Stir the concrete vigorously
B) Close off air voids by gently pressing the concrete around the device
C) Remove excess concrete
D) Tap the container
Answer: B
Air voids around the temperature probe should be closed off by gently pressing the concrete
around the device to ensure accurate reading .
Practice Exam Questions & Answers Complete Study Guide
– Latest 2027/2028 | 100% Verified
SUMMARY TABLE
Section Questions Key Topics Covered
ASTM C1064 – Temperature 1-15 Temperature measurement, device requirements,
calibration, procedure
ASTM C172 – Sampling 16-40 Composite sampling, time limits, mixer types, wet sieving
ASTM C143 – Slump 41-65 Slump test procedure, rodding, layers, measurement
ASTM C138 – Density/Unit 66-90 Density calculation, rodding, vibration, strike-off
Weight
ASTM C231 – Air Content 91-115 Pressure method, aggregate types, consolidation, rodding
(Pressure)
ASTM C173 – Air Content 116-130 Volumetric method, alcohol, all aggregate types
(Volumetric)
ASTM C31 – Making & Curing 131-150 Specimen preparation, rodding, vibration, curing methods
TOTAL 150 Complete ACI CP-1 Exam Coverage
Questions
This comprehensive document contains 150 practice questions for the ACI Concrete Field
Testing Technician Grade 1 (CP-1) Certification Exam. The questions are based on the
required ASTM standards: C1064/C1064M (Temperature), C172/C172M (Sampling),
C143/C143M (Slump), C138/C138M (Density/Unit Weight), C231/C231M (Pressure Air
Content), C173/C173M (Volumetric Air Content), and C31/C31M (Making and Curing
Cylinders) . Each answer includes the correct option in bold with a detailed rationale .
,SECTION 1: ASTM C1064 – TEMPERATURE OF FRESHLY MIXED CONCRETE
(Questions 1–25)
1. What is the standard test method for measuring the temperature of freshly mixed
hydraulic-cement concrete?
A) ASTM C172
B) ASTM C1064
C) ASTM C143
D) ASTM C138
Answer: B
ASTM C1064 is the Standard Test Method for Temperature of Freshly Mixed Hydraulic-
Cement Concrete .
2. The sensor of the temperature measuring device shall be submerged a minimum of
how many inches into the freshly mixed concrete?
A) 1 inch
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C
The temperature measuring device sensor must be submerged a minimum of 3 inches (75
mm) into the freshly mixed concrete to ensure an accurate reading .
3. The temperature measuring device shall have a capacity of measuring temperature
to ± ______ °F throughout a range of ____________.
,A) 2°F, 20°F to 100°F
B) 1°F, 30°F to 120°F
C) 0.5°F, 40°F to 140°F
D) 1°F, 50°F to 150°F
Answer: B
The device must measure temperature to an accuracy of ±1°F (±0.5°C) throughout a range
of 30°F to 120°F .
4. The temperature measuring device shall be calibrated _______, or whenever there
is a question of _______.
A) Monthly, calibration
B) Annually, accuracy
C) Semi-annually, precision
D) Quarterly, reliability
Answer: B
The temperature measuring device must be verified annually or whenever there is a
question of accuracy .
5. The temperature of concrete may be measured in a wheelbarrow. True or False?
A) True
B) False
Answer: A
Temperature may be measured in a wheelbarrow, provided the concrete is properly
sampled and protected from environmental conditions .
6. The temperature of concrete may be measured in a wall form. True or False?
, A) True
B) False
Answer: A
Temperature may be measured in a wall form, but the sample must be representative of the
batch .
7. What must be done to the sample container prior to sampling the concrete?
A) Dry it thoroughly
B) Dampen with water
C) Heat it
D) Coat with oil
Answer: B
The sample container should be dampened with water before sampling to prevent
absorption of water from the concrete, which could affect the sample .
8. What must be done to the concrete surrounding the temperature measuring device
after the device is submerged in the fresh concrete?
A) Stir the concrete vigorously
B) Close off air voids by gently pressing the concrete around the device
C) Remove excess concrete
D) Tap the container
Answer: B
Air voids around the temperature probe should be closed off by gently pressing the concrete
around the device to ensure accurate reading .
