ACI CONCRETE FIELD TESTING
TECHNICIAN 2026 ACTUAL EXAM
COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
ACI Concrete Field Testing Technician – Grade I
Examination
(Actual Exam Coverage / Content Areas)
The American Concrete Institute ACI Concrete Field
Testing Technician – Grade I Examination evaluates a
candidate’s ability to properly perform and document
standard fresh concrete field tests according to ASTM
procedures and ACI requirements.
Exam coverage
Sampling fresh concrete correctly
Performing slump tests accurately
Measuring air content using pressure and volumetric
methods
, Determining concrete temperature
Calculating unit weight and yield
Preparing cylinders and beams properly
Understanding ASTM procedures
Using testing equipment correctly
Applying proper consolidation methods
Protecting specimens during curing and transport
Following safety procedures
Completing documentation accurately
Recognizing invalid test conditions
Maintaining calibration and equipment tolerances
ACI Concrete Field Testing Technician – Grade I MCQs
(Questions 1–50)
1.
A technician performing a slump test lifts the slump cone
sideways instead of vertically after rodding the final layer.
What is the most likely consequence of this improper
procedure?
A. Increased measured air content
B. Invalid slump test result
,C. Higher compressive strength
D. Lower concrete temperature
Answer: B. Invalid slump test result
Rationale: ASTM C143 requires the cone to be lifted
vertically in a steady upward motion. Tilting or twisting
the cone disturbs the concrete mass and invalidates the
slump result because the concrete deforms improperly.
2.
During concrete sampling from a ready-mix truck, the
technician collects material only from the beginning
portion of discharge. Why is this procedure unacceptable?
A. Initial discharge always contains excessive water
B. Composite samples must represent the entire batch
C. Temperature testing cannot be completed afterward
D. Cement content becomes impossible to calculate
Answer: B. Composite samples must represent the entire
batch
Rationale: ASTM C172 requires composite sampling from
different portions of discharge to ensure the sample
accurately represents the entire concrete batch and avoids
segregation effects.
, 3.
A field technician rods each layer of concrete in a cylinder
mold only ten times instead of the required number. What
testing issue could most likely result?
A. Excessive bleeding only
B. Improper consolidation and trapped air voids
C. Faster concrete curing
D. Incorrect thermometer readings
Answer: B. Improper consolidation and trapped air voids
Rationale: ASTM C31 specifies a required number of
rodding strokes to properly consolidate concrete.
Insufficient rodding leaves trapped air and produces
nonrepresentative strength specimens.
4.
While conducting an air-content pressure test, a technician
notices aggregate particles trapped around the lid seal.
What should be done next?
A. Continue testing immediately
B. Add additional water pressure
C. Clean and reseal the apparatus properly
D. Increase the calibration factor manually
Answer: C. Clean and reseal the apparatus properly
TECHNICIAN 2026 ACTUAL EXAM
COMPLETE QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE THIS YEAR
JUST RELEASED
ACI Concrete Field Testing Technician – Grade I
Examination
(Actual Exam Coverage / Content Areas)
The American Concrete Institute ACI Concrete Field
Testing Technician – Grade I Examination evaluates a
candidate’s ability to properly perform and document
standard fresh concrete field tests according to ASTM
procedures and ACI requirements.
Exam coverage
Sampling fresh concrete correctly
Performing slump tests accurately
Measuring air content using pressure and volumetric
methods
, Determining concrete temperature
Calculating unit weight and yield
Preparing cylinders and beams properly
Understanding ASTM procedures
Using testing equipment correctly
Applying proper consolidation methods
Protecting specimens during curing and transport
Following safety procedures
Completing documentation accurately
Recognizing invalid test conditions
Maintaining calibration and equipment tolerances
ACI Concrete Field Testing Technician – Grade I MCQs
(Questions 1–50)
1.
A technician performing a slump test lifts the slump cone
sideways instead of vertically after rodding the final layer.
What is the most likely consequence of this improper
procedure?
A. Increased measured air content
B. Invalid slump test result
,C. Higher compressive strength
D. Lower concrete temperature
Answer: B. Invalid slump test result
Rationale: ASTM C143 requires the cone to be lifted
vertically in a steady upward motion. Tilting or twisting
the cone disturbs the concrete mass and invalidates the
slump result because the concrete deforms improperly.
2.
During concrete sampling from a ready-mix truck, the
technician collects material only from the beginning
portion of discharge. Why is this procedure unacceptable?
A. Initial discharge always contains excessive water
B. Composite samples must represent the entire batch
C. Temperature testing cannot be completed afterward
D. Cement content becomes impossible to calculate
Answer: B. Composite samples must represent the entire
batch
Rationale: ASTM C172 requires composite sampling from
different portions of discharge to ensure the sample
accurately represents the entire concrete batch and avoids
segregation effects.
, 3.
A field technician rods each layer of concrete in a cylinder
mold only ten times instead of the required number. What
testing issue could most likely result?
A. Excessive bleeding only
B. Improper consolidation and trapped air voids
C. Faster concrete curing
D. Incorrect thermometer readings
Answer: B. Improper consolidation and trapped air voids
Rationale: ASTM C31 specifies a required number of
rodding strokes to properly consolidate concrete.
Insufficient rodding leaves trapped air and produces
nonrepresentative strength specimens.
4.
While conducting an air-content pressure test, a technician
notices aggregate particles trapped around the lid seal.
What should be done next?
A. Continue testing immediately
B. Add additional water pressure
C. Clean and reseal the apparatus properly
D. Increase the calibration factor manually
Answer: C. Clean and reseal the apparatus properly
