NRMCA CONCRETE TECHNOLOGIST LEVEL
2 CERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2026 Q&A | INSTANT
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CORE DOMAINS
• Fundamentals of Concrete and Cement Chemistry
• Cementitious Materials, Supplementary Cementitious
Materials, and Aggregates
• Chemical Admixtures and Their Applications
• Mixture Proportioning and ACI 211 Absolute Volume Method
• Fresh Concrete Properties and Testing Procedures
• Hardened Concrete Properties, Durability, and Testing
• Quality Control, Statistical Methods, and ASTM Specifications
• Concrete Production, Troubleshooting, and Extreme Weather
Concreting
INTRODUCTION
The NRMCA Concrete Technologist Level 2 Certification
examination assesses the knowledge, skills, and judgment required
to evaluate concrete materials, production practices, and mixture
proportioning methods. The exam evaluates cement chemistry,
aggregate properties, admixture applications, fresh and hardened
concrete testing, quality control procedures, and statistical
,evaluation through multiple-choice and scenario-based questions.
Candidates must demonstrate competency in interpreting ASTM
standards, applying ACI code requirements, troubleshooting field
issues, and making data-driven decisions to ensure concrete quality
and performance in real-world applications.
SECTION ONE: QUESTIONS 1–100
Question 1
Which property most directly affects concrete pumpability?
A. Cement alkali content
B. Aggregate shape and grading
C. Air temperature
D. Concrete color
B. Aggregate shape and grading
RATIONALE: Well-graded aggregates with rounded particles
improve cohesion and reduce friction, enhancing pumpability. The
shape and grading of aggregates significantly influence how easily
concrete can be pumped through lines.
Question 2
The primary purpose of supplementary cementitious materials
(SCMs) in concrete is to:
A. Increase setting time only
B. Improve durability and/or performance
,C. Reduce aggregate content
D. Eliminate curing requirements
B. Improve durability and/or performance
RATIONALE: SCMs such as fly ash and slag enhance durability,
strength development, and long-term performance by reacting with
calcium hydroxide to form additional calcium silicate hydrate.
Question 3
Which of the following best describes the primary chemical
compound responsible for early strength development in Portland
cement?
A. Dicalcium silicate (C₂S)
B. Tricalcium aluminate (C₃A)
C. Tricalcium silicate (C₃S)
D. Tetracalcium aluminoferrite (C₄AF)
C. Tricalcium silicate (C₃S)
RATIONALE: Tricalcium silicate (C₃S) hydrates rapidly and is
primarily responsible for early strength development in the first 28
days. C₂S contributes more to late-age strength.
Question 4
A concrete mixture using Type IV Portland cement would be most
appropriate for which application?
, A. Rapid pavement repair requiring high early strength
B. Mass concrete foundation in a large dam
C. Precast concrete elements in a factory
D. Concrete exposed to sulfate-rich soil
B. Mass concrete foundation in a large dam
RATIONALE: Type IV cement is a low-heat cement specifically
designed for mass concrete applications such as dams, where heat
generation during hydration must be minimized to prevent thermal
cracking.
Question 5
What is the maximum allowable loss on ignition (LOI) for Class F
fly ash used in concrete per ASTM C618?
A. 3%
B. 6%
C. 10%
D. 12%
B. 6%
RATIONALE: ASTM C618 limits the loss on ignition for Class F
fly ash to a maximum of 6%. Higher LOI indicates unburned carbon
that can interfere with air-entraining admixtures.
Question 6
2 CERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
CORE DOMAINS
• Fundamentals of Concrete and Cement Chemistry
• Cementitious Materials, Supplementary Cementitious
Materials, and Aggregates
• Chemical Admixtures and Their Applications
• Mixture Proportioning and ACI 211 Absolute Volume Method
• Fresh Concrete Properties and Testing Procedures
• Hardened Concrete Properties, Durability, and Testing
• Quality Control, Statistical Methods, and ASTM Specifications
• Concrete Production, Troubleshooting, and Extreme Weather
Concreting
INTRODUCTION
The NRMCA Concrete Technologist Level 2 Certification
examination assesses the knowledge, skills, and judgment required
to evaluate concrete materials, production practices, and mixture
proportioning methods. The exam evaluates cement chemistry,
aggregate properties, admixture applications, fresh and hardened
concrete testing, quality control procedures, and statistical
,evaluation through multiple-choice and scenario-based questions.
Candidates must demonstrate competency in interpreting ASTM
standards, applying ACI code requirements, troubleshooting field
issues, and making data-driven decisions to ensure concrete quality
and performance in real-world applications.
SECTION ONE: QUESTIONS 1–100
Question 1
Which property most directly affects concrete pumpability?
A. Cement alkali content
B. Aggregate shape and grading
C. Air temperature
D. Concrete color
B. Aggregate shape and grading
RATIONALE: Well-graded aggregates with rounded particles
improve cohesion and reduce friction, enhancing pumpability. The
shape and grading of aggregates significantly influence how easily
concrete can be pumped through lines.
Question 2
The primary purpose of supplementary cementitious materials
(SCMs) in concrete is to:
A. Increase setting time only
B. Improve durability and/or performance
,C. Reduce aggregate content
D. Eliminate curing requirements
B. Improve durability and/or performance
RATIONALE: SCMs such as fly ash and slag enhance durability,
strength development, and long-term performance by reacting with
calcium hydroxide to form additional calcium silicate hydrate.
Question 3
Which of the following best describes the primary chemical
compound responsible for early strength development in Portland
cement?
A. Dicalcium silicate (C₂S)
B. Tricalcium aluminate (C₃A)
C. Tricalcium silicate (C₃S)
D. Tetracalcium aluminoferrite (C₄AF)
C. Tricalcium silicate (C₃S)
RATIONALE: Tricalcium silicate (C₃S) hydrates rapidly and is
primarily responsible for early strength development in the first 28
days. C₂S contributes more to late-age strength.
Question 4
A concrete mixture using Type IV Portland cement would be most
appropriate for which application?
, A. Rapid pavement repair requiring high early strength
B. Mass concrete foundation in a large dam
C. Precast concrete elements in a factory
D. Concrete exposed to sulfate-rich soil
B. Mass concrete foundation in a large dam
RATIONALE: Type IV cement is a low-heat cement specifically
designed for mass concrete applications such as dams, where heat
generation during hydration must be minimized to prevent thermal
cracking.
Question 5
What is the maximum allowable loss on ignition (LOI) for Class F
fly ash used in concrete per ASTM C618?
A. 3%
B. 6%
C. 10%
D. 12%
B. 6%
RATIONALE: ASTM C618 limits the loss on ignition for Class F
fly ash to a maximum of 6%. Higher LOI indicates unburned carbon
that can interfere with air-entraining admixtures.
Question 6
