ACI Concrete Field Testing Technician – Grade I – All Questions & 100% Correct Answers, Already Graded A+ – Latest Update (3 Versions)

1|Page




ACI Concrete Field Testing Technician- Grade I ALL QUESTIONS AND 100% CORRECT
ANSWERS ALREADY GRADED A+ - LATEST UPDATE 2026-2027 [3 VERSIONS]



Question 1

What is the primary purpose of field testing concrete?

A. To assess the concrete’s color
B. To verify compliance with specifications and ensure proper quality
C. To reduce the water content
D. To determine the curing time

Correct Answer: B

Rationale:
Field testing ensures that concrete meets project specifications for strength, consistency, and
durability.



Question 2

Which test is used to measure the consistency or workability of freshly mixed concrete?

A. Slump Test
B. Air Content Test
C. Compressive Strength Test
D. Unit Weight Test

Correct Answer: A

Rationale:
The slump test assesses the workability of concrete and helps identify excessive water or
improper mix.



Question 3

What is the standard size of the slump cone used in testing?

A. 6 in. top × 12 in. bottom × 12 in. height
B. 8 in. top × 12 in. bottom × 12 in. height


UPDATED exam 2026

,2|Page


C. 4 in. top × 8 in. bottom × 12 in. height
D. 6 in. top × 8 in. bottom × 12 in. height

Correct Answer: B

Rationale:
The standard slump cone has an 8-inch top, 12-inch bottom, and 12-inch height.



Question 4

Which tool is used to consolidate concrete in a test specimen or small area?

A. Float
B. Screed
C. Tamping Rod
D. Bull Float

Correct Answer: C

Rationale:
A tamping rod is used to consolidate concrete in molds during sample preparation or testing.



Question 5

What does a low slump indicate?

A. High workability
B. Low water content and stiff concrete
C. Excessive air content
D. Rapid setting

Correct Answer: B

Rationale:
A low slump means the mix is stiff with low workability.



Question 6

Which test measures the air content in freshly mixed concrete?




UPDATED exam 2026

,3|Page


A. Slump Test
B. Air Content Test (pressure or volumetric)
C. Unit Weight Test
D. Compressive Strength Test

Correct Answer: B

Rationale:
Air content tests ensure proper air entrainment, which improves freeze-thaw durability.



Question 7

Why is it important to fill the slump cone in three layers during testing?

A. To improve color uniformity
B. To ensure uniform compaction and remove air pockets
C. To speed up curing
D. To reduce water content

Correct Answer: B

Rationale:
Filling in three layers and rodding each layer ensures uniform compaction and accurate test
results.



Question 8

Which temperature range is recommended for curing concrete specimens for compressive
strength tests?

A. 32–40°F
B. 50–60°F
C. 73 ± 3°F
D. 90–100°F

Correct Answer: C

Rationale:
Concrete specimens are cured at 73 ± 3°F (23 ± 2°C) to ensure consistent strength development.




UPDATED exam 2026

, 4|Page


Question 9

What is the main purpose of the unit weight test of freshly mixed concrete?

A. To determine slump
B. To verify the density and proportion of materials
C. To assess air content only
D. To test for compressive strength

Correct Answer: B

Rationale:
Unit weight testing evaluates the density, which can reveal inconsistencies in mix proportions.



Question 10

When performing a slump test, how should the cone be lifted?

A. Twisted sideways
B. Pulled slowly and vertically
C. Hammered lightly
D. Tilted to one side

Correct Answer: B

Rationale:
The cone must be lifted slowly and vertically to prevent disturbance of the concrete and ensure
accurate measurement.



Question 11

Which of the following affects the results of a slump test?

A. Temperature
B. Aggregate size
C. Method of filling and rodding
D. All of the above

Correct Answer: D

Rationale:
Slump test results are influenced by temperature, aggregate size, water content, and procedure.



UPDATED exam 2026