Cement Multiple-Choice Questions
1. What is the primary purpose of low heat cement?
- A) To increase the heat of hydration
- B) To minimize cracking risks in massive concrete structures
- C) To accelerate strength development
- D) To reduce setting time
Answer: B) To minimize cracking risks in massive concrete structures
2. Which of the following components is limited in low heat cement to reduce heat evolution?
- A) C3S
- B) C2S
- C) C3A
- D) C4AF
Answer: C) C3A
3. What is the approximate reduction in temperature rise during hydration achieved by low heat cement compared to OPC?
- A) 10%
- B) 40%
- C) 60%
- D) 80%
Answer: D) 80%
6. Which type of cement undergoes controlled expansion during hydration?
- A) Low heat cement
- B) High alumina cement
- C) Expansive cement
- D) Rapid hardening cement
Answer: C) Expansive cement
7. What is the primary purpose of expansive cement?
- A) To increase early strength
- B) To reduce temperature rise
- C) To counteract drying shrinkage effects
- D) To accelerate setting time
Answer: C) To counteract drying shrinkage effects
8. Which type of cement is recommended for concrete overlays to minimize reflective cracking?
- A) Low heat cement
- B) High alumina cement
- C) Slag cement
- D) Expansive cement
Answer: D) Expansive cement
9. What is the primary characteristic of rapid hardening cement?
- A) Slow strength development
- B) Long setting time
- C) High early strength
- D) Low heat of hydration
Answer: C) High early strength
10. Which cement type has reduced C3A content to improve resistance to sulfate attacks?
- A) Low heat cement
- B) Rapid hardening cement
- C) Sulfate resisting cement
- D) White cement
Answer: C) Sulfate resisting cement
11. What is the primary application of high alumina cement?
- A) Architectural finishes
- B) Marine structures
- C) Oil well construction
- D) Repair applications
Answer: D) Repair applications
12. Which component is added as a retarder in the manufacturing of high alumina cement?
- A) C3S
- B) C2S
- C) C3A
- D) Gypsum
Answer: D) Gypsum
13. What is the approximate range of aluminum oxide content in high alumina cement?
- A) 10-20%
- B) 25-50%
- C) 35-50%
- D) 60-75%
Answer: B) 25-50%
14. What distinguishes white cement from ordinary Portland cement?
- A) It has a higher C3S content
- B) It is more expensive
- C) It has a longer setting time
- D) It has a grey color
Answer: B) It is more expensive
15. What is the primary application of oil well cement?
- A) Marine structures
- B) Repair applications
- C) Oil well construction
- D) Architectural finishes
Answer: C) Oil well construction
16. Which cement type contains additional cementitious materials to induce controlled expansion?
- A) Low heat cement
- B) High alumina cement
- C) Expansive cement
- D) Rapid hardening cement
Answer: C) Expansive cement
17. What is the primary characteristic of oil well cement?
- A) High fluidity
- B) Low permeability
- C) Rapid setting time
- D) Controlled thickening time
Answer: A) High fluidity
18. Which cement type is recommended for sustainable construction due to the use of industrial by-products?
- A) Slag cement
- B) Low heat cement
- C) Rapid hardening cement
- D) High alumina cement
Answer: A) Slag cement
19. What distinguishes sulfate resisting cement from ordinary Portland cement?
- A) Lower C3A content
- B) Higher fineness
- C) Lower setting time
- D) Higher final strength
Answer: A) Lower C3A content
20. Which cement type has reduced C3S and C3A content to minimize heat of hydration?
- A) Low heat cement
- B) Rapid hardening cement
- C) Portland Pozzolana Cement
- D) High alumina cement
Answer: A) Low heat cement
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