Sunday, February 17, 2019

Civil- Design of Masonry Structures (Objective Questions With Answers)

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Question No. 01
Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars
(A) High shrinkage
(B) Less strength
(C) Both (A) and (B)
(D) None of above
Answer: Option A

Question No. 02
In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as
(A) Sum of thickness of both leaves
(B) Two-third of the sum of thickness of both the leaves
(C) Actual thickness of the stronger leaf
(D) Larger of (B) and (C)
Answer: Option D

Question No. 03
Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar.
Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.
Select your answer based on the codes given below:
(A) Both A and R is true and R is the correct explanation of A
(B) Both A and R is true but R is not a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
Answer: Option C

Question No. 04
For earthquake resistant masonry buildings, the vertical distance between openings one above the
other in a load bearing wall shall not be less than
(A) 50 cm
(B) 60 cm
(C) 75 cm
(D) 100 cm
Answer: Option B

Question No. 05
The mode of failure of a very short masonry member having h/t ratio of less than 4 is by
(A) Shear
(B) Vertical tensile splitting
(C) Buckling
(D) Any of the above
Answer: Option A

Question No. 06
Where a structural component or a system is providing lateral support to five or more walls or
columns, the lateral load to be resisted may be taken as _________ of the total vertical load on
the most heavily loaded wall or column in the group
(A) 4 %
(B) 5 %
(C) 6 %
(D) 7 %
Answer: Option D

Question No. 07
Consider the following statements regarding bands to be provided for strengthening masonry
work in masonry buildings constructed in zone III, IV and V.
(i) Lintel band is provided at lintel level on partition walls,
(ii) Gable band is provided at top of gable masonry below the purlins,
(iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth,
(iv) The bands shall be made of reinforced concrete only.
Of these statements, the correct statements are
(A) (i) and (ii)
(B) (i) and (iii)
(C) (ii) and (iv)
(D) (ii) and (iii)
Answer: Option D

Question No. 08
The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor
(A) 1.2
(B) 1.4
(C) 1.6
(D) 2.0
Answer: Option C

Question No. 09
The timber floor not spanning on the masonry wall but properly anchored to the wall gives
(A) Lateral restraint but not rotational restraint
(B) Rotational restraint but not lateral restraint
(C) Both lateral and rotational restraints
(D) Neither lateral nor rotational restraint
Answer: Option A

Question No. 10
A free standing brick wall 20 cm thick is subjected to a wind pressure of 75kg/m². The maximum
height of wall from stability consideration is
(A) 0.64 m
(B) 0.96 m
(C) 1.28 m
(D) 1.5 m
Answer: Option A

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