ACI Concrete Transportation Inspector
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. What is the primary role of a Concrete Transportation Inspector?
A. To supervise the batching of concrete
B. To ensure concrete is transported, handled, and placed according to
specifications
C. To design concrete mix proportions
D. To test aggregates in the lab
Rationale: The inspector ensures concrete is handled properly during
transportation to maintain quality and compliance with project
specifications.
2. The most critical factor affecting concrete quality during transport is:
A. Truck driver’s skill
,B. Time between batching and placement
C. Truck color
D. Route taken
Rationale: The longer the transport time, the greater the risk of loss of
workability and premature setting.
3. ASTM C94 limits the time between batching and discharge to:
A. 60 minutes
B. 90 minutes
C. 120 minutes
D. 45 minutes
Rationale: ASTM C94 specifies 90 minutes unless a different time is
permitted by the purchaser.
4. The inspector should verify that the drum of a ready-mix truck makes how
many revolutions before discharge?
A. 20
B. 70–100
C. 10
D. 50–60
Rationale: Proper mixing requires 70–100 revolutions at mixing speed to
achieve uniformity.
,5. When water is added to the concrete at the jobsite, the inspector must:
A. Ignore it
B. Record the amount and ensure it doesn’t exceed water-cement ratio
limits
C. Allow any addition needed for workability
D. Restart mixing from scratch
Rationale: The inspector must ensure that added water maintains
compliance with the approved mix design and w/cm ratio.
6. The correct slump test standard is:
A. ASTM C231
B. ASTM C138
C. ASTM C143
D. ASTM C31
Rationale: ASTM C143 covers the slump test method for measuring
concrete consistency.
7. The temperature of concrete is measured according to:
A. ASTM C31
B. ASTM C138
C. ASTM C1064
D. ASTM C143
, Rationale: ASTM C1064 specifies methods for measuring fresh concrete
m m m m m m m m
m temperature. m
m
8. The inspector observes that concrete has segregated during transport.
m m m m m m m m m m
The best action is to:
m m m m m
A. Remix briefly at high speed
m m m m m m
B. Reject the load
m m m m
C. Add water to restore flow
m m m m m
D. Discharge anyway m m
Rationale: Segregation indicates improper handling or excessive
m m m m m m
m vibration—such concrete should be rejected. m m m m m
m
9. A concrete truck should discharge within how many revolutions
m m m m m m m m m
m after mixing? A. 100
m m m m
B. 300
m m
C. 150 m
D. 400 m
Rationale: ASTM C94 states discharge should be completed before 300
m m m m m m m m m
m revolutions of the drum. m m m m
m
10. When checking delivery tickets, inspectors must confirm:
m m m m m m m m
A. Truck driver’s signature
m m m
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary role of a Concrete Transportation Inspector?
A. To supervise the batching of concrete
B. To ensure concrete is transported, handled, and placed according to
specifications
C. To design concrete mix proportions
D. To test aggregates in the lab
Rationale: The inspector ensures concrete is handled properly during
transportation to maintain quality and compliance with project
specifications.
2. The most critical factor affecting concrete quality during transport is:
A. Truck driver’s skill
,B. Time between batching and placement
C. Truck color
D. Route taken
Rationale: The longer the transport time, the greater the risk of loss of
workability and premature setting.
3. ASTM C94 limits the time between batching and discharge to:
A. 60 minutes
B. 90 minutes
C. 120 minutes
D. 45 minutes
Rationale: ASTM C94 specifies 90 minutes unless a different time is
permitted by the purchaser.
4. The inspector should verify that the drum of a ready-mix truck makes how
many revolutions before discharge?
A. 20
B. 70–100
C. 10
D. 50–60
Rationale: Proper mixing requires 70–100 revolutions at mixing speed to
achieve uniformity.
,5. When water is added to the concrete at the jobsite, the inspector must:
A. Ignore it
B. Record the amount and ensure it doesn’t exceed water-cement ratio
limits
C. Allow any addition needed for workability
D. Restart mixing from scratch
Rationale: The inspector must ensure that added water maintains
compliance with the approved mix design and w/cm ratio.
6. The correct slump test standard is:
A. ASTM C231
B. ASTM C138
C. ASTM C143
D. ASTM C31
Rationale: ASTM C143 covers the slump test method for measuring
concrete consistency.
7. The temperature of concrete is measured according to:
A. ASTM C31
B. ASTM C138
C. ASTM C1064
D. ASTM C143
, Rationale: ASTM C1064 specifies methods for measuring fresh concrete
m m m m m m m m
m temperature. m
m
8. The inspector observes that concrete has segregated during transport.
m m m m m m m m m m
The best action is to:
m m m m m
A. Remix briefly at high speed
m m m m m m
B. Reject the load
m m m m
C. Add water to restore flow
m m m m m
D. Discharge anyway m m
Rationale: Segregation indicates improper handling or excessive
m m m m m m
m vibration—such concrete should be rejected. m m m m m
m
9. A concrete truck should discharge within how many revolutions
m m m m m m m m m
m after mixing? A. 100
m m m m
B. 300
m m
C. 150 m
D. 400 m
Rationale: ASTM C94 states discharge should be completed before 300
m m m m m m m m m
m revolutions of the drum. m m m m
m
10. When checking delivery tickets, inspectors must confirm:
m m m m m m m m
A. Truck driver’s signature
m m m
