Prestress loss due to friction occurs________________?

Related Mcqs:

1. Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?

   A. elastic shortening of concrete
   B. shrinkage of concrete
   C. creep of concrete
   D. loss due to friction

2. Due to circumferential action of the spiral in a spirally reinforced column________________?

   A. capacity of column is decreased
   B. ductility of column reduces
   C. capacity of column is decreased but ductility of column increases
   D. both the capacity of column and ductility of column increase

3. 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

4. In a spherical dome the hoop stress due to a concentrated load at crown is_______________?

   A. compressive everywhere
   B. tensile everywhere
   C. partly compressive and partly tensile
   D. zero

5. Workability of concrete is directly proportional to________________?

   A. aggregate cement ratio
   B. time of transit
   C. grading of the aggregate
   D. all of above

6. Workability of concrete is inversely pro¬portional to______________?

   A. time of transit
   B. ‘vater-cement ratio
   C. the air in the mix
   D. size of aggregate

7. For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?

   A. 0.75-0.80
   B. 0.80-0.85
   C. 0.85 – 0.92
   D. above 0.92

8. Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to________________?

   A. 1/3
   B. 1/5
   C. 1/7
   D. 1/10
   where 1 is the span

9. The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of__________________?

   A. 0.367 xu
   B. 0.416 xu
   C. 0.446 xu
   D. 0.573 xu

   where xu is the depth of neutral axis at the limit state of collapse

10. The main reinforcement in the toe of a T- shaped R C. retaining wall is provided on_______________?

    1. top face parallel to the wall
    2. top face perpendicular to the wall
    3. bottom face paralleUo the wall
    4. bottom face perpendicular to the wall
    The correct answer is ?

    A. only (2) is correct
    B. (1) and (2)are correct
    C. (3) and (4) are correct
    D. only (4) is correct