Hi everyone, this post provides you Top 50 MCQ question on Cement. These question will help you for GATE exam, RRB exam, SSC JE exam and civil engineering exams. Kindly read the question properly and learn with explanation.
1. What is cement primarily used for?
A) Insulation B) Structural support C) Decoration D) Lubrication Answer: B Explanation: Cement is primarily used for providing structural support in construction projects. It binds materials together to create strong and durable structures.
2. Which raw material is a primary component of cement production? A) Sand B) Water C) Clay D) Plastic Answer: C Explanation: Clay is a primary component of cement production, as it provides the necessary silica, alumina, and iron oxide required for cement's chemical composition.
3. The process of cement hydration involves: A) Drying of cement B) Mixing with water to form a paste C) Evaporation of water D) Freezing of cement Answer: B Explanation: Cement hydration is the chemical reaction that occurs when cement reacts with water to form a paste, which eventually hardens and gains strength.
4. What is the main role of gypsum in cement production? A) Color enhancement B) Accelerating setting time C) Reducing strength D) Providing flexibility Answer: B Explanation: Gypsum is added to cement to control the setting time and prevent rapid setting. It helps in achieving the desired workability and strength development.
5. The main chemical compound responsible for cement's strength is: A) Calcium carbonate B) Silica C) Alumina D) Tricalcium silicate Answer: D Explanation: Tricalcium silicate (C3S) is the main chemical compound in cement responsible for early strength development and hydration.
6. Which type of cement is suitable for use in marine structures? A) Ordinary Portland Cement (OPC) B) Rapid Hardening Cement C) Sulphate Resistant Cement D) White Cement Answer: C Explanation: Sulphate Resistant Cement is specifically designed to resist the harmful effects of sulfate attack, making it suitable for marine and sulfate-rich environments.
7. Which type of cement is produced by adding pozzolanic materials? A) Rapid Hardening Cement B) Portland Pozzolana Cement (PPC) C) White Cement D) Low Heat Cement Answer: B Explanation: Portland Pozzolana Cement (PPC) is produced by adding pozzolanic materials like fly ash, silica fumes, etc., to Ordinary Portland Cement (OPC) to improve durability and workability.
8. The initial setting time of cement refers to: A) The time it takes to mix cement with water B) The time it takes for the cement paste to harden completely C) The time it takes for the cement paste to partially harden D) The time it takes for cement clinker to form Answer: C Explanation: The initial setting time of cement is the time it takes for the cement paste to partially harden after adding water.
9. Which type of cement is used to reduce the heat generated during hydration? A) High Alumina Cement B) Low Heat Cement C) Quick-setting Cement D) Blended Cement Answer: B Explanation: Low Heat Cement is used to reduce the heat generated during the hydration process, which is especially important in massive concrete structures to prevent cracks.
10. The compound responsible for the gray color of cement is: A) Calcium oxide B) Iron oxide C) Aluminum oxide D) Magnesium oxide Answer: B Explanation: Iron oxide is responsible for the gray color of cement. The presence of iron compounds gives cement its characteristic gray appearance.
11. Which type of cement is used in artistic and decorative applications? A) Rapid Hardening Cement B) Blended Cement C) White Cement D) Portland Pozzolana Cement (PPC) Answer: C Explanation: White Cement is used in artistic and decorative applications due to its bright white color, which allows for better coloring and aesthetics.
12. The standard consistency of cement paste is determined by the: A) Vicat apparatus B) Le Chatelier apparatus C) Autoclave D) Compaction test Answer: A Explanation: The standard consistency of cement paste is determined using the Vicat apparatus, which measures the amount of water required to achieve a standard consistency.
13. Which type of cement is produced by grinding clinker with a small amount of gypsum? A) Rapid Hardening Cement B) Low Heat Cement C) Ordinary Portland Cement (OPC) D) Sulphate Resistant Cement Answer: C Explanation: Ordinary Portland Cement (OPC) is produced by grinding clinker with a small amount of gypsum to regulate its setting time and control early strength development.
14. The property of cement that allows it to maintain its volume after setting is called: A) Workability B) Plasticity C) Shrinkage D) Autogenous healing Answer: D Explanation: Autogenous healing is the property of cement that allows it to self-heal and maintain its volume after setting, which can help in sealing small cracks.
15. Which type of cement is used in cold weather conditions due to its ability to set quickly? A) Portland Pozzolana Cement (PPC) B) Quick-setting Cement C) Low Heat Cement D) Rapid Hardening Cement Answer: B Explanation: Quick-setting Cement is used in cold weather conditions because it sets quickly, allowing construction to proceed even in low temperatures.
16. The primary chemical compounds in cement responsible for its strength are: A) C3S and C2S B) C3A and C4AF C) C2S and C3A D) C4AF and C2S Answer: A Explanation: The primary chemical compounds responsible for cement's strength are Tricalcium Silicate (C3S) and Dicalcium Silicate (C2S).
17. What is the effect of an increased percentage of C3A in cement? A) Increased early strength B) Reduced heat generation C) Improved workability D) Increased susceptibility to sulfate attack Answer: D Explanation: An increased percentage of C3A in cement makes it more susceptible to sulfate attack, leading to reduced durability.
18. Which type of cement is used in high-temperature applications like foundries and furnace linings? A) High Alumina Cement B) Quick-setting Cement C) Low Heat Cement D) Portland Pozzolana Cement (PPC) Answer: A Explanation: High Alumina Cement is used in high-temperature applications due to its excellent resistance to heat and fire.
19. Which test is used to determine the soundness of cement? A) Vicat test B) Le Chatelier test C) Setting time test D) Fineness test Answer: B Explanation: The Le Chatelier test is used to determine the soundness of cement, which indicates its ability to resist volume changes after setting.
20. Which type of cement is used to prevent corrosion of steel reinforcement in concrete structures? A) Sulphate Resistant Cement B) Blended Cement C) Portland Pozzolana Cement (PPC) D) Ordinary Portland Cement (OPC) Answer: A Explanation: Sulphate Resistant Cement is used to prevent the corrosion of steel reinforcement in concrete structures exposed to sulfate-rich environments.
21. What is the minimum percentage of calcium sulfate (gypsum) that is added to cement during production? A) 1% B) 2% C) 3% D) 5% Answer: B Explanation: Typically, around 2% of calcium sulfate (gypsum) is added to cement during production to control its setting time.
22. Which type of cement is used in the construction of dams and large hydraulic structures? A) Low Heat Cement B) Rapid Hardening Cement C) Sulphate Resistant Cement D) Blended Cement Answer: A Explanation: Low Heat Cement is used in the construction of dams and large hydraulic structures to control the heat generated during hydration and prevent cracks.
23. The fineness of cement is determined by: A) Vicat apparatus B) Le Chatelier apparatus C) Blaine air permeability test D) Compaction test Answer: C Explanation: The fineness of cement is determined using the Blaine air permeability test, which measures the specific surface area of the cement particles.
24. Which type of cement is produced by intergrinding or blending clinker with pozzolanic materials or granulated slag? A) Rapid Hardening Cement B) Portland Pozzolana Cement (PPC) C) Sulphate Resistant Cement D) Low Heat Cement Answer: B Explanation: Portland Pozzolana Cement (PPC) is produced by intergrinding or blending clinker with pozzolanic materials or granulated slag to enhance durability and workability.
25. Which type of cement is used for decorative purposes and architectural finishes? A) Rapid Hardening Cement B) Sulphate Resistant Cement C) White Cement D) Blended Cement Answer: C Explanation: White Cement is used for decorative purposes and architectural finishes due to its aesthetic appeal and ability to be colored easily.
26. What is the effect of adding too much water during cement mixing? A) Increased strength B) Reduced workability C) Faster setting time D) Reduced durability Answer: B Explanation: Adding too much water during cement mixing reduces the workability of the mixture and can negatively affect the final strength and durability of the concrete.
27. Which type of cement gains strength more slowly than Ordinary Portland Cement (OPC)? A) Rapid Hardening Cement B) Low Heat Cement C) Sulphate Resistant Cement D) Quick-setting Cement Answer: B Explanation: Low Heat Cement gains strength more slowly than Ordinary Portland Cement (OPC), making it suitable for mass concrete structures to prevent cracking due to heat.
28. The heat of hydration in cement is released during: A) Mixing B) Setting C) Curing D) Drying Answer: B Explanation: The heat of hydration in cement is released during the setting process, when the chemical reactions between cement and water are most active.
29. Which type of cement is used for making precast elements and high-strength concrete? A) Portland Pozzolana Cement (PPC) B) Blended Cement C) Rapid Hardening Cement D) Sulphate Resistant Cement Answer: C Explanation: Rapid Hardening Cement is used for making precast elements and high-strength concrete due to its early strength development.
30. Which test is used to determine the compressive strength of cement? A) Vicat test B) Le Chatelier test C) Setting time test D) Compression test Answer: D Explanation: The compression test is used to determine the compressive strength of cement, indicating its ability to withstand axial loads.
31. Which compound in cement contributes to its high early strength development? A) Tricalcium silicate (C3S) B) Dicalcium silicate (C2S) C) Tricalcium aluminate (C3A) D) Tetracalcium aluminoferrite (C4AF) Answer: A Explanation: Tricalcium silicate (C3S) is the compound in cement responsible for its high early strength development during hydration.
32. Which type of cement is produced by reducing the amount of C3A to prevent sulfate attack? A) Rapid Hardening Cement B) Low Heat Cement C) Sulphate Resistant Cement D) Portland Pozzolana Cement (PPC) Answer: C Explanation: Sulphate Resistant Cement is produced by reducing the amount of Tricalcium aluminate (C3A) to enhance resistance against sulfate attack.
33. Which test measures the soundness of cement by subjecting it to high-pressure steam? A) Vicat test B) Le Chatelier test C) Autoclave test D) Compaction test Answer: C Explanation: The autoclave test measures the soundness of cement by subjecting it to high-pressure steam, simulating the conditions that can lead to volume changes.
34. Which type of cement is used in the construction of water-retaining structures and sewage systems? A) Sulphate Resistant Cement B) Blended Cement C) Rapid Hardening Cement D) Portland Pozzolana Cement (PPC) Answer: A Explanation: Sulphate Resistant Cement is used in the construction of water-retaining structures and sewage systems to resist the effects of sulfate attack.
35. Which type of cement has a lower heat of hydration compared to Ordinary Portland Cement (OPC)? A) Rapid Hardening Cement B) Low Heat Cement C) Quick-setting Cement D) Sulphate Resistant Cement Answer: B Explanation: Low Heat Cement has a lower heat of hydration compared to Ordinary Portland Cement (OPC), making it suitable for massive concrete structures.
36. The primary compound responsible for the setting of cement is: A) Tricalcium silicate (C3S) B) Dicalcium silicate (C2S) C) Tricalcium aluminate (C3A) D) Tetracalcium aluminoferrite (C4AF) Answer: A Explanation: Tricalcium silicate (C3S) is the primary compound responsible for the initial setting of cement during hydration.
37. What is the role of fineness in cement? A) To enhance color B) To control setting time C) To increase strength D) To reduce workability Answer: B Explanation: Fineness in cement affects its setting time. Finer particles lead to faster setting, while coarser particles result in slower setting times.
38. Which type of cement is used for mass concrete structures like dams and foundations? A) Rapid Hardening Cement B) Low Heat Cement C) Quick-setting Cement D) Portland Pozzolana Cement (PPC) Answer: B Explanation: Low Heat Cement is used for mass concrete structures to prevent excessive heat generation during hydration, which can lead to cracks.
39. Which test measures the expansion of cement due to unsoundness? A) Vicat test B) Le Chatelier test C) Setting time test D) Autoclave test Answer: B Explanation: The Le Chatelier test measures the expansion of cement due to unsoundness, indicating its susceptibility to volume changes after setting.
40. Which type of cement is used in the construction of roads and pavements? A) Rapid Hardening Cement B) Low Heat Cement C) Sulphate Resistant Cement D) Ordinary Portland Cement (OPC) Answer: D Explanation: Ordinary Portland Cement (OPC) is commonly used in the construction of roads and pavements due to its availability and suitability for such applications.
41. What is the primary function of pozzolanic materials in blended cement? A) Increasing setting time B) Enhancing workability C) Reducing heat of hydration D) Improving color Answer: C Explanation: The primary function of pozzolanic materials in blended cement is to reduce the heat of hydration and improve durability.
42. Which type of cement is produced by adding a higher amount of alumina and ferric oxide? A) High Alumina Cement B) Low Heat Cement C) Rapid Hardening Cement D) Portland Pozzolana Cement (PPC) Answer: A Explanation: High Alumina Cement is produced by adding a higher amount of alumina and ferric oxide, making it suitable for high-temperature applications.
43. The process of grinding clinker, gypsum, and other materials to produce cement is called: A) Hydration B) Calcination C) Clinkering D) Blending Answer: C Explanation: The process of grinding clinker, gypsum, and other materials to produce cement is called clinkering.
44. Which type of cement is used to reduce the heat of hydration and the risk of thermal cracking? A) High Alumina Cement B) Low Heat Cement C) Rapid Hardening Cement D) Blended Cement Answer: B Explanation: Low Heat Cement is used to reduce the heat of hydration and the risk of thermal cracking in large concrete structures.
45. What is the effect of a higher percentage of C4AF in cement? A) Increased strength B) Reduced heat of hydration C) Faster setting time D) Improved workability Answer: B Explanation: A higher percentage of Tetracalcium aluminoferrite (C4AF) in cement reduces the heat of hydration, making it suitable for structures where heat generation is a concern.
46. Which type of cement is used for repairing structures due to its rapid setting characteristics? A) Rapid Hardening Cement B) Low Heat Cement C) Quick-setting Cement D) Sulphate Resistant Cement Answer: C Explanation: Quick-setting Cement is used for repairing structures where rapid setting is required to minimize downtime.
47. The compound responsible for the early strength development of cement is: A) Tricalcium silicate (C3S) B) Dicalcium silicate (C2S) C) Tricalcium aluminate (C3A) D) Tetracalcium aluminoferrite (C4AF) Answer: A Explanation: Tricalcium silicate (C3S) is responsible for the early strength development of cement during the hydration process.
48. Which type of cement is used in decorative concrete flooring and terrazzo finishes? A) Blended Cement B) White Cement C) Quick-setting Cement D) Low Heat Cement Answer: B Explanation: White Cement is used in decorative concrete flooring and terrazzo finishes due to its color and aesthetic appeal.
49. The initial setting time of cement is affected by: A) Fineness of cement particles B) Percentage of gypsum C) Type of aggregate used D) Ambient temperature Answer: B Explanation: The initial setting time of cement is affected by the percentage of gypsum added, which controls the rate of setting.
50. Which type of cement has a higher percentage of alumina and iron oxide? A) Rapid Hardening Cement B) Low Heat Cement C) Quick-setting Cement D) High Alumina Cement Answer: D Explanation: High Alumina Cement has a higher percentage of alumina and iron oxide, giving it superior heat resistance properties.
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