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Biotechnology MCQ set-3

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1. What function does iron oxide perform in cement?




2. How many major ingredients are present in the composition of cement?




3. Sulphur in cement is present in what amount?




4. In the same figure in question 2, what is ‘b’ and its function?




5. How is the argillaceous material used in the manufacture of cement stored?




6. Which one of the below is rarely used as fuel in burning stage of wet process of cement manufacturing?




7. How much does a bag of cement weigh?




8. What is the advantage of using precalciner?




9. Which stone provides the calcareous component required for the manufacture of cement?




10. Which one of the below is not a feature of cement Kiln?




11. What is the abbreviation of PPC?




12. Which of the following is not an advantage of rapid hardening cement?




13. How many types of cement are there based on the ability to set in presence of water?




14. What property does air-entraining cement provide?




15. Which of the following types of cement is used in marine structures?




16. Which pair of the compound and coloured cement mentioned below is wrong?




17. Which of the following is not a pozzolanic material?




18. Water proof cement is prepared by mixing ordinary cement with:




19. Ordinary Portland cement (OPC) has been classified into how many grades?




20. Grade 43 OPC is used widely for:




21. After how many days is the strength of cement is tested and graded according to the result?




22. Grade 43 OPC shall be rejected if it remains in bulk storage in the factory for:




23. The ratio of percentage of alumina to iron oxide in OPC 43 grade is:




24. Which of the following cannot be added in 33 grade OPC after burning stage?




25. How much maximum percentage by mass of performance improvers can be added in grade 33 OPC?




26. How many constituents are there in the brick earth?




27. Which one of the below is the most important ingredient in the brick earth?




28. In what form should lime be present in the brick earth?




29. Excess of oxides of iron makes the brick:




30. What happens to raw bricks if an excess of alumina is present?




31. What is the harmful effect of presents of alkali in brick earth on bricks?




32. Why do bricks become brittle when excess silica is present?




33. Which of the following leads to the formation of small pores in brick?




34. The presence of which of the below renders clay totally unsuitable for brick manufacture?




35. How many types of the brick earth are there?




36. Loamy, mild or sandy clay has __________ percentage of alkali?




37. Which one of the below is the first step in the preparation of brick earth process?




38. Why is the process of weathering performed?




39. The process of kneading brick earth is called:




40. Which one of the following is not a part of pug mill?




41. How many methods of moulding brick earth are there?




42. The meaning of slop moulded bricks is:




43. Which is the most commonly employed drying method in India?




44. Which of the following is not a chemical change that takes place in the brick earth during burning?




45. The depression provided in the face of a brick during its manufacturing is called:




46. What is the recommended size of a brick?




47. A good brick should not absorb more than what percent of water when soaked?




48. Which of the following bricks is not preferred?




49. Which of the below is used to sound proof bricks?




50. A good brick when dropped from the height of 1 metre can: