101. The depth of footing for an isolated column is governed by
i) maximum bending moment
ii) shear force
iii) punching shear
The correct answer is
a) only (i)
b) (i)and(ii)
c) (i) and (iii)
d) (i), (ii) and (iii)
Ans: d
102. If the foundations of all the columns of a structure are designed on the total live and dead load basis, then
a) there will be no settlement of columns
b) there will be no differential settlement
c) the settlement of exterior columns will be more than interior columns
d) the settlement of interior columns will be more than exterior columns
Ans:c
103. To minimise the effect of differential settlement, the area of a footing should be designed for
a) dead load only
b) dead load + live load
c) dead load + fraction of live load
d) live load + fraction of dead load
Ans: c
104. 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
Ans: c
105. In a pile of length /, the points of suspen¬sion from ends for lifting it are located at
a) 0.207 1
b) 0.25 /
c) 0.293 /
d) 0.333 /
Ans: a
106. 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
Ans: c
107. While designing the pile as a column, the end conditions are nearly
a) both ends hinged
b) both ends fixed
c) one end fixed and other end hinged
d) one end fixed and other end free
Ans: c
108. The recommended value of modular ratio for reinforced brick work is
a) 18
b) 30
c) 40
d) 58
Ans: c
109. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is
a) 0.43 d
b) 0.55 d
c) 0.68 d
d) 0.85 d
Ans: a
110. Assertion A : The load factor for live load is greater than that for dead load.
Reason R : The live loads are more uncertain than dead loads.
Select your answer based on the coding system given below :
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Ans: a
111. The centroid of compressive force, from the extreme compression fibre, in limit state design lies at a distance of
a) 0.367 xu
b) 0.416 xu
c) 0.446 xu
d) 0.573 xu
where xu is the depth of neutral axis at the limit state of collapse
Ans: b
112. The design yield stress of steel according to IS: 456-1978 is
a) 0.37 fy
b) 0.57 fy
c) 0.67 fy
d) 0.87 fy
where fy is the characteristic yield strength of steel
Ans: d
113. According to Whitney’s theory, ultimate strain of concrete is assumed to be
a) 0.03%
b) 0.1%
c) 0.3%
d) 3%
Ans: c
114. According to Whitney’s theory, depth of stress block for a balanced section of a concrete beam is limited to
a) 0.43 d
b) 0.537 d
c) 0.68 d
d) 0.85 d
where d is effective depth of beam
Ans: b
115. The load factors for live load and dead load are taken respectively as
a) 1.5 and 2.2
b) 2.2 and 1.5
c) 1.5 and 1.5
d) 2.2 and 2.2
Ans:b
116. As per Whitney’s theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by
a) ^acybd2
b) ^acybd2
c) 0.185acybd2
d) 0.43acybd2
where acy is the cylinder compressive strength of concrete
Ans: b
127. The effect of creep on modular ratio is
a) to decrease it
b) to increase it
c) either to decrease or to increase it
d) to keep it unchanged
Ans: b
128. Shrinkage of concrete depends upon
i) humidity of atmosphere
ii) passage of time
iii) stress
The correct answer is
a) (i) and (ii)
b) (ii) and (iii)
c) only (iii)
d) All (i), (ii) and (iii)
Ans: a
129. Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to
a) deflect downward
b) deflect upward
c) deflect downward or upward
d) none of the above
Ans: a
130. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively
a) compressive and tensile
b) tensile and compressive
c) both compressive
d) both tensile
Ans: b
131. 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
Ans: d
132. In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always
a) zero
b) tensile
c) compressive
d) tensile or compressive
Ans: c
133. Sinking of an intermediate support of a continuous beam
i) reduces the negative moment at support
ii) increases the negative moment at support
iii) reduces the positive moment at centre of span
iv) increases the positive moment at centre of span
The correct answer is
a) (i) and (iii)
b) (i)and(iv)
c) (ii) and (iii)
d) (ii) and (iv)
Ans: b
134. The maximum value of hoop compression in a dome is given by
a) wR / 4d
b) wR/2d
c) wR/d
d) 2wR/d
where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome
Ans: b
135. In a spherical dome the hoop stress due to a concentrated load at crown is
a) compressive everywhere
b) tensile everywhere
c) partly compressive and partly tensile
d) zero
Ans:b