NRMCA Concrete Technologist
Level 2 Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Guaranteed Pass
(GRADED A+)
1. Which type of cement is most commonly used for general-
purpose concrete?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: A
Rationale: Type I Portland cement is the general-purpose cement
suitable for most applications where special properties like high
early strength or low heat of hydration are not required.
2. What is the typical maximum water-cement ratio (w/c)
recommended for normal-strength concrete to maintain
durability and minimize shrinkage?
A. 0.35
,B. 0.45
C. 0.55
D. 0.65
Correct Answer: B
Rationale: A w/c ratio of 0.45 or less is commonly recommended
to maintain durability and minimize shrinkage and cracking.
3. What is the primary purpose of air-entraining admixtures
in concrete?
A. Increase strength
B. Improve workability
C. Improve freeze-thaw durability
D. Accelerate setting
Correct Answer: C
Rationale: Air-entraining admixtures create microscopic air
bubbles, which improve resistance to freeze-thaw cycles and
deicing chemicals.
4. Which aggregate property has the greatest influence on
concrete workability?
A. Specific gravity
B. Particle shape and texture
C. Moisture content
D. Thermal conductivity
,Correct Answer: B
Rationale: Angular and rough-textured aggregates reduce
workability, while rounded and smooth aggregates improve it.
5. What is the standard specimen shape for compressive
strength testing of concrete?
A. Cylinder
B. Cube
C. Prism
D. Beam
Correct Answer: A
Rationale: Concrete cylinders, typically 6x12 inches or 4x8 inches,
are the standard specimen for compressive strength tests.
6. What is the main effect of a high water-cement ratio on
hardened concrete?
A. Increases strength
B. Reduces permeability and durability
C. Reduces strength and durability
D. Improves workability only
Correct Answer: C
Rationale: Excess water increases porosity in hardened concrete,
reducing strength and durability.
, 7. Which type of cement is recommended for rapid strength
gain?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: C
Rationale: Type III cement is a high-early-strength cement,
allowing faster construction schedules.
8. What is the primary purpose of using a low-heat cement
(Type IV) in mass concrete?
A. Increase early strength
B. Reduce temperature rise and thermal cracking
C. Improve workability
D. Accelerate setting time
Correct Answer: B
Rationale: Low-heat cement limits the heat of hydration, helping
to control temperature gradients and prevent thermal cracking in
large pours.
9. In the Absolute Volume Method for mixture proportioning,
the volume of cementitious material is calculated by which
formula?
A. Mass ÷ unit weight of water
Level 2 Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales
2026 Q&A | Guaranteed Pass
(GRADED A+)
1. Which type of cement is most commonly used for general-
purpose concrete?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: A
Rationale: Type I Portland cement is the general-purpose cement
suitable for most applications where special properties like high
early strength or low heat of hydration are not required.
2. What is the typical maximum water-cement ratio (w/c)
recommended for normal-strength concrete to maintain
durability and minimize shrinkage?
A. 0.35
,B. 0.45
C. 0.55
D. 0.65
Correct Answer: B
Rationale: A w/c ratio of 0.45 or less is commonly recommended
to maintain durability and minimize shrinkage and cracking.
3. What is the primary purpose of air-entraining admixtures
in concrete?
A. Increase strength
B. Improve workability
C. Improve freeze-thaw durability
D. Accelerate setting
Correct Answer: C
Rationale: Air-entraining admixtures create microscopic air
bubbles, which improve resistance to freeze-thaw cycles and
deicing chemicals.
4. Which aggregate property has the greatest influence on
concrete workability?
A. Specific gravity
B. Particle shape and texture
C. Moisture content
D. Thermal conductivity
,Correct Answer: B
Rationale: Angular and rough-textured aggregates reduce
workability, while rounded and smooth aggregates improve it.
5. What is the standard specimen shape for compressive
strength testing of concrete?
A. Cylinder
B. Cube
C. Prism
D. Beam
Correct Answer: A
Rationale: Concrete cylinders, typically 6x12 inches or 4x8 inches,
are the standard specimen for compressive strength tests.
6. What is the main effect of a high water-cement ratio on
hardened concrete?
A. Increases strength
B. Reduces permeability and durability
C. Reduces strength and durability
D. Improves workability only
Correct Answer: C
Rationale: Excess water increases porosity in hardened concrete,
reducing strength and durability.
, 7. Which type of cement is recommended for rapid strength
gain?
A. Type I
B. Type II
C. Type III
D. Type IV
Correct Answer: C
Rationale: Type III cement is a high-early-strength cement,
allowing faster construction schedules.
8. What is the primary purpose of using a low-heat cement
(Type IV) in mass concrete?
A. Increase early strength
B. Reduce temperature rise and thermal cracking
C. Improve workability
D. Accelerate setting time
Correct Answer: B
Rationale: Low-heat cement limits the heat of hydration, helping
to control temperature gradients and prevent thermal cracking in
large pours.
9. In the Absolute Volume Method for mixture proportioning,
the volume of cementitious material is calculated by which
formula?
A. Mass ÷ unit weight of water
