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.Management Sciences
Category: Design of Masonry Structures
Cement mortars richer than 1 : 3 are not used in masonry because_________________?
i) there is no gain in strength of masonry
ii) there is high shrinkage
iii) they are prone to segregation
select the correct statements?
A. Only (ii) is correct
B. (i) and (ii) are correct
C. (ii) and (iii) are correct
D. (i), (ii) and (iii) are correct
The thickness of each leaf of a cavity wall shall not be less than_________________?
A. 5 cm
B. 7.5 cm
C. 10 cm
D. 15 cm
For designing masonry components of a structure, seismic forces provision in the design calculation is not necessary for buildings constructed in________________?
A. Zone I only
B. Zone I and II
C. Zone I, II and III
D. Zone I, II, III and IV
Water retentivity for brick masonry should not be less than__________________?
A. 50%
B. 60%
C. 70%
D. 80%
The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.
The correct sequence of increasing order of their strengths is?
A. LLLZ.HLHI.MLMJ
B. L2,L,,M2>Mi,H2)H,
C. M,,M2, H,,H2,Li,L2
D. L2,L,,M,,M2,H,,H2
For earthquake resistant masonry buildings, where seismic coefficient is less than 0.08, the horizontal distance between two openings shall not be less than_________________?
A. Vt x height of shorter opening
B. Vt x height of longer opening
C. Ax height of shorter opening
D. Vi x height of longer opening
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)
Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be___________________?
A. more
B. less
C. the same in both the cases
D. 100%
The use of relatively weak mortar_______________?
Consider the following statements.
1. will accommodate movements due to loads and, cracking if any, and will be distributed as thin hair cracks which are less noticeable or harmful.
2. will result in reduction of stresses due to differential expansion of masonry units.
select the correct statements.
A. 1 alone is correct
B. 2 alone is correct
C. both 1 and 2 are correct
D. neither 1 nor 2 is correct
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