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.Management Sciences
Category: Design of Masonry Structures
Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar. Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars?
Select your answer according to the codes 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.
The effective height of free standing nonload bearing wall and column respectively will be_________________?
A. 1.OH and 1.OH
B. 1.5Handl.5H
C. 2.0Handl.5H
D. 2.0H and 2.0H
where H is the height of wall or column between centers of supports.
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.
the correct statements are?
A. (i) and (ii)
B. (i) and (iii)
C. (ii) and (iv)
D. (ii) and (iii)
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
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