ACI CONCRETE FIELD TESTING TECHNICIAN - GRADE 1 EXAM | 2026/2027
American Concrete Institute Concrete Field Testing Technician Grade 1 Certification Exam with
Complete Questions & Verified Answers | Latest Version
Overview
This 2026/2027 updated resource contains the latest ACI Concrete Field Testing Technician
Grade 1 Certification Examination with the exact 110 questions and verified answers, following
current ACI certification program requirements, ASTM International standards, and industry best
practices for field testing of fresh and hardened concrete.
Key Features
● ✓ Actual ACI certification exam format with the official 110 questions
● ✓ Comprehensive coverage of concrete testing procedures, equipment, and calculations
● ✓ Updated 2026/2027 ASTM standard revisions and ACI program requirements
● ✓ Practical field testing scenarios and problem-solving applications
● ✓ Quality control and documentation requirements
Core Content Areas (110 Total Questions)
● Concrete Fundamentals & Materials (20 Qs)
● Fresh Concrete Testing Procedures (35 Qs)
● Hardened Concrete Testing & Evaluation (25 Qs)
● Test Equipment & Calibration (15 Qs)
● Quality Control & Documentation (15 Qs)
Detailed Content Breakdown
● Slump Testing (ASTM C143) (12 Qs)
● Air Content Testing (ASTM C173, C231) (10 Qs)
● Unit Weight & Yield Calculations (ASTM C138) (10 Qs)
● Temperature Measurements (ASTM C1064) (6 Qs)
● Cylinder Molding & Curing (ASTM C31, C192) (15 Qs)
● Compressive Strength Testing (ASTM C39) (12 Qs)
● Probe Penetration & Rebound Hammer Tests (ASTM C803, C805) (8 Qs)
● Moisture Content & Absorption Testing (7 Qs)
● Equipment Maintenance & Calibration Procedures (10 Qs)
● Report Preparation & Documentation Requirements (10 Qs)
● Safety Procedures & Personal Protective Equipment (10 Qs)
Answer Format
Correct answers are marked in bold green and include: - Specific ASTM standard citation
applications and compliance requirements - Step-by-step testing procedure validations and
error identification - Calculation methods for yield, air content, and compressive strength -
Equipment calibration frequency and documentation requirements - Acceptance criteria
interpretations and non-conformance reporting - Safety protocol implementations and
hazard mitigation strategies
,Updates for 2026/2027
● Reflects 2026-2027 ASTM standard revisions for concrete testing
● Updated ACI certification program requirements and recertification processes
● Enhanced digital reporting and data management requirements
● New sustainability testing procedures for green concrete
● Revised temperature monitoring and hot/cold weather concreting protocols
● Updated equipment verification and calibration standards
● New safety requirements for silica exposure and respiratory protection
● Revised technician competency assessment and performance evaluation criteria
ACI Concrete Field Testing Technician Grade 1 Exam – Full 110 Questions with Verified
Answers & Rationale
1. According to ASTM C143, what is the required shape of the slump cone?
A. Square pyramid
B. Frustum of a cone
C. Cylinder
D. Sphere
Rationale: ASTM C143 specifies the slump cone as a frustum of a cone with bottom diameter 8 in (200
mm), top diameter 4 in (100 mm), and height 12 in (300 mm).
2. How many layers is concrete placed into the slump cone during testing per ASTM C143?
A. 1
B. 3
C. 4
D. 2
Rationale: ASTM C143 requires filling the slump cone in three equal layers, each rodded 25 times with a
tamping rod.
3. What is the maximum time allowed to raise the slump cone after rodding the final layer?
A. 1 to 3 seconds
,B. 3 to 7 seconds
C. 10 to 15 seconds
D. Immediately
Rationale: ASTM C143 states the mold must be lifted vertically in 3 to 7 seconds without lateral or
torsional motion.
4. Which ASTM standard governs air content testing by the pressure method?
A. ASTM C173
B. ASTM C231
C. ASTM C138
D. ASTM C1064
Rationale: ASTM C231 covers the pressure method for determining air content of fresh concrete; C173 is
the volumetric method.
5. According to ASTM C1064, when must concrete temperature be measured?
A. Only at the batch plant
B. At the time of sampling for other tests
C. After placement
D. Once per day
Rationale: ASTM C1064 requires temperature measurement at the time of sampling to ensure
compliance with specified limits, typically between 50°F and 95°F unless modified.
6. What is the minimum dimension of the base plate used for slump testing?
A. 12 x 12 inches
B. 24 x 24 inches or 2 ft²
C. 18 x 18 inches
, D. No base plate required
Rationale: ASTM C143 requires a non-absorbent, rigid base plate with a minimum area of 2 ft² (e.g.,
24" x 24") to prevent movement during testing.
7. How often must the slump cone be checked for dimensional accuracy?
A. Annually
B. Every 6 months
C. Before each use
D. Only when damaged
Rationale: ACI CP-1 and ASTM C143 require dimensional verification of the slump cone at least every 6
months.
8. What is the maximum allowed time between obtaining a concrete sample and beginning
slump test?
A. 1 minute
B. 5 minutes
C. 10 minutes
D. 15 minutes
Rationale: ASTM C143 states testing must begin within 5 minutes after obtaining the sample to prevent
setting or evaporation effects.
9. Which type of slump is considered acceptable per ASTM C143?
A. Shear slump
B. Collapse slump
C. True slump
D. All slumps are acceptable
Rationale: Only a "true slump" (uniform vertical subsidence) is valid. Shear or collapse slumps indicate
segregation and require retesting with a new sample.
American Concrete Institute Concrete Field Testing Technician Grade 1 Certification Exam with
Complete Questions & Verified Answers | Latest Version
Overview
This 2026/2027 updated resource contains the latest ACI Concrete Field Testing Technician
Grade 1 Certification Examination with the exact 110 questions and verified answers, following
current ACI certification program requirements, ASTM International standards, and industry best
practices for field testing of fresh and hardened concrete.
Key Features
● ✓ Actual ACI certification exam format with the official 110 questions
● ✓ Comprehensive coverage of concrete testing procedures, equipment, and calculations
● ✓ Updated 2026/2027 ASTM standard revisions and ACI program requirements
● ✓ Practical field testing scenarios and problem-solving applications
● ✓ Quality control and documentation requirements
Core Content Areas (110 Total Questions)
● Concrete Fundamentals & Materials (20 Qs)
● Fresh Concrete Testing Procedures (35 Qs)
● Hardened Concrete Testing & Evaluation (25 Qs)
● Test Equipment & Calibration (15 Qs)
● Quality Control & Documentation (15 Qs)
Detailed Content Breakdown
● Slump Testing (ASTM C143) (12 Qs)
● Air Content Testing (ASTM C173, C231) (10 Qs)
● Unit Weight & Yield Calculations (ASTM C138) (10 Qs)
● Temperature Measurements (ASTM C1064) (6 Qs)
● Cylinder Molding & Curing (ASTM C31, C192) (15 Qs)
● Compressive Strength Testing (ASTM C39) (12 Qs)
● Probe Penetration & Rebound Hammer Tests (ASTM C803, C805) (8 Qs)
● Moisture Content & Absorption Testing (7 Qs)
● Equipment Maintenance & Calibration Procedures (10 Qs)
● Report Preparation & Documentation Requirements (10 Qs)
● Safety Procedures & Personal Protective Equipment (10 Qs)
Answer Format
Correct answers are marked in bold green and include: - Specific ASTM standard citation
applications and compliance requirements - Step-by-step testing procedure validations and
error identification - Calculation methods for yield, air content, and compressive strength -
Equipment calibration frequency and documentation requirements - Acceptance criteria
interpretations and non-conformance reporting - Safety protocol implementations and
hazard mitigation strategies
,Updates for 2026/2027
● Reflects 2026-2027 ASTM standard revisions for concrete testing
● Updated ACI certification program requirements and recertification processes
● Enhanced digital reporting and data management requirements
● New sustainability testing procedures for green concrete
● Revised temperature monitoring and hot/cold weather concreting protocols
● Updated equipment verification and calibration standards
● New safety requirements for silica exposure and respiratory protection
● Revised technician competency assessment and performance evaluation criteria
ACI Concrete Field Testing Technician Grade 1 Exam – Full 110 Questions with Verified
Answers & Rationale
1. According to ASTM C143, what is the required shape of the slump cone?
A. Square pyramid
B. Frustum of a cone
C. Cylinder
D. Sphere
Rationale: ASTM C143 specifies the slump cone as a frustum of a cone with bottom diameter 8 in (200
mm), top diameter 4 in (100 mm), and height 12 in (300 mm).
2. How many layers is concrete placed into the slump cone during testing per ASTM C143?
A. 1
B. 3
C. 4
D. 2
Rationale: ASTM C143 requires filling the slump cone in three equal layers, each rodded 25 times with a
tamping rod.
3. What is the maximum time allowed to raise the slump cone after rodding the final layer?
A. 1 to 3 seconds
,B. 3 to 7 seconds
C. 10 to 15 seconds
D. Immediately
Rationale: ASTM C143 states the mold must be lifted vertically in 3 to 7 seconds without lateral or
torsional motion.
4. Which ASTM standard governs air content testing by the pressure method?
A. ASTM C173
B. ASTM C231
C. ASTM C138
D. ASTM C1064
Rationale: ASTM C231 covers the pressure method for determining air content of fresh concrete; C173 is
the volumetric method.
5. According to ASTM C1064, when must concrete temperature be measured?
A. Only at the batch plant
B. At the time of sampling for other tests
C. After placement
D. Once per day
Rationale: ASTM C1064 requires temperature measurement at the time of sampling to ensure
compliance with specified limits, typically between 50°F and 95°F unless modified.
6. What is the minimum dimension of the base plate used for slump testing?
A. 12 x 12 inches
B. 24 x 24 inches or 2 ft²
C. 18 x 18 inches
, D. No base plate required
Rationale: ASTM C143 requires a non-absorbent, rigid base plate with a minimum area of 2 ft² (e.g.,
24" x 24") to prevent movement during testing.
7. How often must the slump cone be checked for dimensional accuracy?
A. Annually
B. Every 6 months
C. Before each use
D. Only when damaged
Rationale: ACI CP-1 and ASTM C143 require dimensional verification of the slump cone at least every 6
months.
8. What is the maximum allowed time between obtaining a concrete sample and beginning
slump test?
A. 1 minute
B. 5 minutes
C. 10 minutes
D. 15 minutes
Rationale: ASTM C143 states testing must begin within 5 minutes after obtaining the sample to prevent
setting or evaporation effects.
9. Which type of slump is considered acceptable per ASTM C143?
A. Shear slump
B. Collapse slump
C. True slump
D. All slumps are acceptable
Rationale: Only a "true slump" (uniform vertical subsidence) is valid. Shear or collapse slumps indicate
segregation and require retesting with a new sample.
