300+ TOP Construction Engineering Interview Questions and Answers

CONSTRUCTION Engineering Interview Questions :-

1. What are all the types of cement?

1. Ordinary Portland cement
2. PC33,OPC43 and OPC53 grade
3. Rapid hardening cement
4. Extra rapid hardening cement
5. Sulphate resisting cement
6. Portland slag cement
7. Quick setting cement
8. Low heat cement
9. Portland pazzolona cement
10. Air entraining cement
11. Colored cement

2. Differentiate dry process and wet process of manufacturing cement? Process

• Lime stone and clay are ground to fine powder separately and are mixed together
• Water is added to make a thick paste which contains 14% of moisture
• The paste format are dried and off charged into a rotary kiln
• The product obtained often calcinations in rotary kiln

Process

• The crushed raw materials are fed in to a ball mill and a little water is added
• The steel balls in the ball mill pulverized the raw material which form a slurry with water
• The slurry is passed through storage tanks where the proportioning of compound is adjusted to ensure desired chemical composition

3. Explain batching, what are all the methods of batching?

The measurement of materials for making concrete is known as batching. Methods of batching Volume batching Weigh batching

4. What are all the raw materials of the cement?

• Lime
• Silica
• Alumina
• Calcium sulphate
• Iron oxide
• Magnesium oxide
• Sulphar ti oxide
• alkalis

5. Write notes on steam curing.

This approach is widely used in precast concrete units.here the precast units are kept under warm and damp atmosphere of a steam chamber.

6. Define non destructive testing.

Non destructive testing is done on haredend concrete in non destructive testing methods soe properties of concrete are used to estimate strength durability ,elastic parameters,crack depth micro cracks and progressive deteriotion of concrete.

7. What are all the types of concrete test?

Slump test compressive test split tensile strength.

8. Initial Setting Time of Cement?

9. Final Setting Time of Cement?

10. List out Grades of Cement available in Market?

11. Apparatus used for Soundness of Cement?

12. Equipment used for Abrasion Test?

13. Equipment used for Attrition Test?

14. Workability Means?

15. List out Workability Tests?

16. Slump value required for RCC Slab?

17. What is Segregation of concrete?

18. List out various sizes of Coarse Aggregate used in Concrete?

19. Equipment used to test Compressive Strength of Concrete?

20. Size of Concrete Cubes?

21. What is the standard w/c value for nominal mix of concrete?

22. Density of Concrete?

23. No. of Cube samples required for testing Compressive Strength for 100 m3 of concrete?

24. List out Shape Tests on Coarse Aggregate?

25. Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course?

26. The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate is harder?

27. Two materials have abrasion values 3 and 10 respectively. Which one is harder and why?

28. Define flash and fire points of Bitumen?

29. Define specific gravity?

30. What do you understand by the term 80/100 bitumen?

31. What is softening point?

32. If material A has softening point of 56 and B has 42 which binder is good and why?

33. List the factors that affect the result of a ductility test?

34. Explain the significance of ductility test?

35. Explain the term viscosity?

36. Explain aggregate crushing value. How would you express?

37. Aggregate crushing value of material A is 40 and that of B is 25. Which one is better and why?

38. How is aggregate impact value expressed?

39. Aggregate impact value material A is 20 and that of B is 45. Which one is better for surface course? Why?

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