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.Management Sciences
Category: Design of Concrete Structures
For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than_______________?
A. 15 mm
B. 25 mm
C. 30 mm
D. 40 mm
Ratio of permissible stress in direct compression and bending compression is______________?
A. less than 1
B. between 1 and 1.5
C. between 1.5 and 2.0
D. greater than 2
During erection, the pile of length / is supported by a crane at a distance of________________?
A. 0.207 /
B. 0.293 /
C. 0.7071
D. 0.793 /
from the driving end of pile which rests on the ground
Approximate value of shrinkage strain in concrete, is________________?
A. 0.003
B. 0.0003
C. 0.00003
D. 0.03
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
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 compressive strength of 100 mm cube as compared to 150 mm cube is always_______________?
A. less
B. more
C. equal
D. none of the above
If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section_______________?
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
Select the incorrect statement?
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
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on______________?
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
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