Q.1) Strength of concrete increases with :
A) Increase in w/c ratio
B) Increase in fineness of cement
C) Decrease in curing time
D) Decrease in size of aggregate
Option (B)
Q.2) The most commonly used admixture which prolongs the setting and hardening time is :
A) Gypsum
B) Calcium chloride
C) Sodium silicate
D) All of the above
Option (A)
Q.3) Modulus of rupture of concrete is a measure of :
A) Flexural tensile strength
B) Direct tensile strength
C) Compressive strength
D) Split tensile strength
Option (A)
Q.4) Diagonal tension in a beam :
A) Is maximum at neutral axis
B) Decreases below the neutral axis and increases above the neutral axis
C) Increases below the neutral axis and decreases above the neutral axis
D) Remains same
Option (C)
Q.5) In case of hand mixing of concrete, the extra cement to be added is –
A) 5%
B) 10%
C) 15%
D) 20%
Option (B)
Q.6) 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
Option (D)
Q.7) Minimum pitch of transverse reinforcement in a column is :
A) The least lateral dimension of the member
B) 16 x smallest diameter of longitudinal reinforcement bar to be tied
C) 48 x times the diameter of transverse reinforcement
D) Lesser of above three values
Option (D)
Q.8) A higher modular ratio shows :
A) Higher compressive strength of concrete
B) Lower compressive strength of concrete
C) Higher tensile strength of steel
D) Lower tensile strength of steel
Option (B)
Q.9) When shear stress exceeds the permissible limit in a slab, then it is reduced by :
A) Increasing the depth
B) Providing shear reinforcement
C) Using high strength steel
D) Using thinner bars but more in number
Option (A)
Q.10) The minimum diameter of longitudinal bars in a column is :
A) 6 mm
B) 8 mm
C) 12 mm
D) 16 mm
Option (C)
Q.11) Maximum percentage reinforcement in case of slabs is limited to :
A) 2
B) 4
C) 6
D) 8
Option (B)
Q.12) The critical section for finding maximum bending moment for footing under masonry wall is located :
A) At the middle of the wall
B) At the edge of the wall
C) Halfway between the middle and edge of the wall
D) At a distance equal to effective depth of footing from the edge of the wall
Option (C)
Q.13) The recommended value of modular ratio for reinforced brick work is :
A) 18
B) 30
C) 40
D) 58
Option (C)
Q.14) The maximum compressive stress in concrete for design purposes is based on a partial safety factor of :
A) 1.15
B) 1.50
C) 1.85
D) 2.50
Option (B)
Q.15) The creep strains are :
A) Caused due to dead loads only
B) Caused due to live loads only
C) Caused due to both dead loads and live loads
D) Independent of loads
Option (A)
Q.16) A beam curved in plan is designed for :
A) Bending moment and shear
B) Bending moment and torsion
C) Shear and torsion
D) Bending moment, shear and torsion
Option (D)
Q.17) 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
Option (C)
Q.18) 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
Option (A)
Q.19) Prestress loss due to friction occurs :
A) Only in post-tensioned beams
B) Only in pre-tensioned beams
C) Both in post-tensioned and pre-tensioned beams
D) None of the above
Option (A)
Q.20) In concrete, use of angular crushed aggregate in place of natural rounded gravel effects :
A) Direct tensile strength
B) Split tensile strength
C) Flexural tensile strength
D) Compressive strength
Option (C)
