Concrete TechnologyQuiz-1 Answer all the following questions.1. What is the difference between static modulus of elasticity and dynamic modulus of elasticity in concrete?

2. Explain the procedure to find the compressive strength, tensile strength, and modulus of elasticity of concrete.

3. Draw the stress strain curve for mild steel bar and HYSD bar when subjected to static tension test.

4. What is Hookes law? Give an example for a non hookean material. What is the difference between elastic limit and proportional limit?

5. What is Poissons ratio? Give the value range for concrete. Does Poissons ratio can be negative? If so, state an example.

6. Can the stress strain curve for mild steel can be obtained by static compression test. If so, explain the curve clearly and the limitation in it.

7. Explain the following terms. (a). Creep. (b). Relaxation.

8. What do you mean by the terms segregation and bleeding in concrete? Give some reasons how they occur.

9. State the following statements are true or false. Give a proper justification.(a) The use of high grade cement does not necessarily yield high grade concrete as the strength of the concrete depends upon the mix proportions of ingredients.(b) Is it possible to produce concrete of wide ranging strengths using a particular grade of cement?

10. State the disadvantages of using higher grades of cement upon lower grades of cement.

11. Does the use of higher grade of cement produces good quality of concrete? Can we produce good quality of concrete even with lower grade of cement?

12. Is it mandatory for a pozzolonic material to have a cementitious value? Justify it.

13. If you were given a bag of aggregates, how will you segregate coarse aggregate and fine aggregate?

14. Discuss zone I sand and Zone IV sand.

15. What is the initial and final setting time of cement? How would you determine the setting time experimentally?

16. What is responsible in the composition of cement to arrest the flash setting?

17. Why you will be able to see lumps in a cement bag, when it is exposed to air.

18. Can the pH value of water can be 6, which is used for the preparation of concrete? Is so, specify the pH limits of water.

19. What is workability? State some tests to measure workability. Are the tests accurate or they are empirical tests? Explain any one test in detail.

20. Write about Shrinkage in concrete?