Minnesota Aggregate Technician
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of aggregate testing?
A. To determine color
B. To evaluate suitability for construction use
C. To measure electrical conductivity
D. To identify chemical composition
Correct Answer: B
Rationale: Aggregate testing ensures materials meet required
physical and mechanical properties for construction performance.
2. Which test determines particle size distribution?
A. Los Angeles abrasion test
B. Sieve analysis
C. Soundness test
D. Specific gravity test
, Correct Answer: B
Rationale: Sieve analysis separates particles by size to determine
gradation.
3. Fine aggregate is defined as material passing which sieve?
A. 4.75 mm
B. 9.5 mm
C. 12.5 mm
D. 2.36 mm
Correct Answer: A
Rationale: Fine aggregate passes the 4.75 mm (No. 4) sieve.
4. The Los Angeles abrasion test measures:
A. Moisture content
B. Resistance to wear and impact
C. Particle shape
D. Chemical composition
Correct Answer: B
Rationale: It evaluates toughness and abrasion resistance of
aggregates.
5. What is the purpose of sampling aggregate?
A. Reduce cost
B. Obtain representative material for testing
C. Improve gradation
, D. Dry the material
Correct Answer: B
Rationale: Sampling ensures test results represent the entire
stockpile or source.
6. Moisture content in aggregates is determined by:
A. Heating and weighing
B. Crushing and sieving
C. Chemical titration
D. Magnetic separation
Correct Answer: A
Rationale: Moisture content is found by drying the sample and
measuring weight loss.
7. Specific gravity of aggregate refers to:
A. Color density
B. Weight compared to water
C. Particle size
D. Hardness
Correct Answer: B
Rationale: It is the ratio of aggregate density to water density.
8. Bulk density of aggregate is:
A. Weight per unit volume including voids
B. Weight of water displaced
, C. Chemical weight
D. Solid particle density only
Correct Answer: A
Rationale: Bulk density includes both solids and void spaces.
9. Which sieve is commonly used as the No. 200 sieve?
A. 75 µm
B. 150 µm
C. 300 µm
D. 600 µm
Correct Answer: A
Rationale: No. 200 sieve has an opening of 75 micrometers.
10. Soundness test evaluates resistance to:
A. Heat
B. Freezing and thawing
C. Crushing
D. Chemical staining
Correct Answer: B
Rationale: It tests durability under weathering cycles.
11. Coarse aggregate is material retained on which sieve?
A. 4.75 mm
B. 2.36 mm
C. 1.18 mm
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of aggregate testing?
A. To determine color
B. To evaluate suitability for construction use
C. To measure electrical conductivity
D. To identify chemical composition
Correct Answer: B
Rationale: Aggregate testing ensures materials meet required
physical and mechanical properties for construction performance.
2. Which test determines particle size distribution?
A. Los Angeles abrasion test
B. Sieve analysis
C. Soundness test
D. Specific gravity test
, Correct Answer: B
Rationale: Sieve analysis separates particles by size to determine
gradation.
3. Fine aggregate is defined as material passing which sieve?
A. 4.75 mm
B. 9.5 mm
C. 12.5 mm
D. 2.36 mm
Correct Answer: A
Rationale: Fine aggregate passes the 4.75 mm (No. 4) sieve.
4. The Los Angeles abrasion test measures:
A. Moisture content
B. Resistance to wear and impact
C. Particle shape
D. Chemical composition
Correct Answer: B
Rationale: It evaluates toughness and abrasion resistance of
aggregates.
5. What is the purpose of sampling aggregate?
A. Reduce cost
B. Obtain representative material for testing
C. Improve gradation
, D. Dry the material
Correct Answer: B
Rationale: Sampling ensures test results represent the entire
stockpile or source.
6. Moisture content in aggregates is determined by:
A. Heating and weighing
B. Crushing and sieving
C. Chemical titration
D. Magnetic separation
Correct Answer: A
Rationale: Moisture content is found by drying the sample and
measuring weight loss.
7. Specific gravity of aggregate refers to:
A. Color density
B. Weight compared to water
C. Particle size
D. Hardness
Correct Answer: B
Rationale: It is the ratio of aggregate density to water density.
8. Bulk density of aggregate is:
A. Weight per unit volume including voids
B. Weight of water displaced
, C. Chemical weight
D. Solid particle density only
Correct Answer: A
Rationale: Bulk density includes both solids and void spaces.
9. Which sieve is commonly used as the No. 200 sieve?
A. 75 µm
B. 150 µm
C. 300 µm
D. 600 µm
Correct Answer: A
Rationale: No. 200 sieve has an opening of 75 micrometers.
10. Soundness test evaluates resistance to:
A. Heat
B. Freezing and thawing
C. Crushing
D. Chemical staining
Correct Answer: B
Rationale: It tests durability under weathering cycles.
11. Coarse aggregate is material retained on which sieve?
A. 4.75 mm
B. 2.36 mm
C. 1.18 mm
