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
Most common method of prestressing used for factory production is________________?
(A) Long line method
(B) Freyssinet system
(C) Magnel-Blaton system
(D) Lee-Macall system
Prestress loss due to friction occurs________________?
(A) only in post-tensioned beams
(B) only in pretensioned beams
(C) in both post-tensioned and preten-sioned beams
(D) none of the above
High carbon content in the steel causes_______________?
(A) decrease in tensile strength but increase in ductility
(B) increase in tensile strength but decrease in ductility
(C) decrease in both tensile strength and ductility
(D) increase in both tensile strength and ductility
In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on_______________?
(A) only (1)
(B) only (2)
(C) both (1) and (4)
(D) both (2)and (3)
The effect of adding calcium chloride in concrete is________________?
(A) (1) and (3)
(B) (1)and(4)
(C) (2)and (3)
(D) (2)and (4)
Which of the following types of soil is transported by gravitational forces ?
(A) loess
(B) talus
(C) drift
(D) dune sand
Voids ratio of a soil mass can_________________?
(A) never be greater than unity
(B) be zero
(C) take any value greater than zero
(D) take values between 0 and 1 only
If the voids of a soil mass are full of air only, the soil is termed as_______________?
(A) air entrained soil
(B) partially saturated soil
(C) dry soil
(D) dehydrated soil
Constant head permeameter is used to test permeability of_______________?
(A) silt
(B) clay
(C) coarse sand
(D) fine sand