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🧪 Materials Engineer Accreditation Exam Reviewer – Part 5 Cement Types, Properties, and Pozzolanic Materials


📘 Topic Focus: Cement Types, Properties, and Pozzolanic Materials
✍️ Total Questions: 25
🔍 Based on: DPWH Blue Book 2024 Edition

👷 Instructions: Answer each question based on your knowledge or review. Scroll down for the answer key.

🧠 Knowledge Check – Cement and Pozzolans

  1. Which type of cement is used where low heat of hydration is needed?
    A. Type I
    B. Type II
    C. Type IV
    D. Type V
  2. Which compound in cement is primarily responsible for early strength?
    A. C3S
    B. C2S
    C. C3A
    D. C4AF
  3. Which test determines the soundness of cement?
    A. Fineness test
    B. Vicat test
    C. Le Chatelier test
    D. Slump test
  4. What is the minimum setting time for Portland cement?
    A. 15 mins
    B. 30 mins
    C. 45 mins
    D. 60 mins
  5. Which pozzolanic material is volcanic in origin?
    A. Fly ash
    B. Silica fume
    C. Natural pozzolan
    D. Slag cement
  6. What is the standard size of cement bag in the Philippines?
    A. 25 kg
    B. 30 kg
    C. 40 kg
    D. 40 kg (net weight)
  7. Which cement is suitable for marine structures?
    A. Type I
    B. Type II
    C. Type IV
    D. Type V
  8. The initial setting time of cement is tested using:
    A. Slump cone
    B. Le Chatelier apparatus
    C. Vicat apparatus
    D. Curing tank
  9. Which test checks the fineness of cement?
    A. Blaine air permeability test
    B. Vicat apparatus
    C. Le Chatelier
    D. CBR test
  10. Which mineral admixture improves sulfate resistance?
    A. Fly ash
    B. Natural pozzolan
    C. GGBFS
    D. All of the above
  11. What is the specific gravity of ordinary Portland cement?
    A. 1.5
    B. 2.0
    C. 3.15
    D. 4.0
  12. What is the typical Blaine fineness of cement in cm²/g?
    A. 2000
    B. 3200
    C. 4000
    D. 5000
  13. GGBFS stands for:
    A. Ground Granulated Blast Furnace Slag
    B. General Graded Binder for Sand
    C. Graded Granule Base Filler Slab
    D. Ground Gravel Binding Fine Sand
  14. Which cement type gains strength rapidly?
    A. Type I
    B. Type II
    C. Type III
    D. Type V
  15. When cement is exposed to water, what hydration compound primarily forms strength?
    A. Ettringite
    B. CSH
    C. Gypsum
    D. Lime
  16. Fly ash is a byproduct of:
    A. Steel industry
    B. Cement plant
    C. Coal combustion
    D. Iron smelting
  17. Which test evaluates pozzolanic activity?
    A. Blaine test
    B. Strength activity index
    C. Soundness test
    D. Flow test
  18. The maximum allowable expansion in Le Chatelier test is:
    A. 5 mm
    B. 8 mm
    C. 10 mm
    D. 12 mm
  19. What compound in cement causes flash setting?
    A. C2S
    B. C3S
    C. C3A
    D. C4AF
  20. Which cement type is not recommended for sulfate areas?
    A. Type I
    B. Type II
    C. Type V
    D. Blended cement
  21. Pozzolans react with which cement compound to form CSH?
    A. Gypsum
    B. Free lime (CaOH)
    C. C3S
    D. Ferrite
  22. Which factor reduces the rate of hydration of cement?
    A. Fineness
    B. C3A content
    C. Cooling temperature
    D. Water content
  23. Which standard governs Portland cement specifications in the Philippines?
    A. ASTM C150
    B. AASHTO T99
    C. ASTM D698
    D. ACI 318
  24. What is the primary purpose of gypsum in cement?
    A. Increase workability
    B. Accelerate setting
    C. Retard setting
    D. Improve fineness
  25. Silica fume increases which property in concrete?
    A. Bleeding
    B. Setting time
    C. Permeability
    D. Strength

📋 Answer Key

1. C   2. A   3. C   4. B   5. C   6. D   7. D   8. C   9. A   10. D
11. C   12. B   13. A   14. C   15. B   16. C   17. B   18. B   19. C   20. A
21. B   22. C   23. A   24. C   25. D

📎 References

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