Category: Design of Concrete Structures

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

A. not needed
B. provided equally on inner and front faces
C. provided more on inner face than on front face
D. provided more on front face than on inner face

A. less
B. more
C. equal
D. none of the above

A. depends on as, only
B. depends on aCbC only
C. depends on both crst and acbc
D. is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bend¬ing compression

A. The loss of prestress is more in pre-tensioning system than in post-tensioning system.
B. Pretensioning system has greater certainty about its durability.
C. For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system
D. none of the above

A. the front face in one direction
B. the front face in both directions
C. the inner face in one direction
D. the inner face in both directions

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

A. workability admixtures
B. accelerators
C. retarders
D. air entraining agents

A. 0.15% to 2%
B. 0.8% to 4%
C. 0.8% to 6%
D. 0.8% to 8%

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