Approximate value of shrinkage strain in concrete, is________________?

Related Mcqs:

1. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?

   A. compressive and tensile
   B. tensile and compressive
   C. both compressive
   D. both tensile

2. Shrinkage of concrete depends upon_____________?

   1. humidity of atmosphere
   2. passage of time
   3. stress
   The correct answer is?

   A. (1) and (2)
   B. (2)and (3)
   C. only (3)
   D. All (1), (2)and (3)

3. According to Whitney’s theory, ultimate strain of concrete is assumed to be_____________?

   A. 0.03%
   B. 0.1%
   C. 0.3%
   D. 3%

4. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?

   A. M15
   B. M20
   C. M 10
   D. M25

5. The approximate value of the ratio between direct tensile strength and flexural strength is_____________?

   A. 0.33
   B. 0.5
   C. 0.75
   D. 1.0

6. According to IS : 456-1978, the fiexural strength of concrete is________________?

   A. directly proportional to compressive strength
   B. inversely proportional to compressive strength
   C. directly proportional to square root of compressive strength
   D. inversely proportional to square root of compressive strength

7. The purpose of reinforcement in prestressed concrete is________________?

   A. to provide adequate bond stress
   B. to resist tensile stresses
   C. to impart initial compressive stress in concrete
   D. all of the above

8. The effect of adding calcium chloride in concrete is________________?

   1. to increase shrinkage
   2. to decrease shrinkage
   3. to increase setting time
   4. to decrease setting time
   The correct answer is?
   A. (1) and (3)
   B. (1)and(4)
   C. (2)and (3)
   D. (2)and (4)

9. Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to_____________?

   A. deflect downward
   B. deflect upward
   C. deflect downward or upward
   D. none of the above

10. Stress strain curve of high tensile steel_______________?

    A. has a definite yield point
    B. does not show definite yield point but yield point is defined by 0.1% proof stress
    C. does not show definite yield point but yield point is defined by 0.2% proof stress
    D. does not show definite yield point but yield point is defined by 2% proof stress