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
✅ The correct answer is option D.

The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is______________?

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
✅ The correct answer is option D.

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
✅ The correct answer is option C.

Minimum pitch of transverse reinforcement in a column is________________?

A. the least lateral dimension of the member
B. sixteen times the smallest diameter of longitudinal reinforcement bar to be tied
C. forty-eight times the diameter of transverse reinforcement
D. lesser of the above three values
✅ The correct answer is option D.