Design of Masonry Structures
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. Codes:

Both A and R is true and R is the correct explanation of A
A is true but R is false
A is false but R is true
Both A and R is true but R is not a correct explanation of A

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Design of Masonry Structures
Consider the following statements: The use of relatively weak mortar 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.

1 alone is correct
Both 1 and 2 are correct
2 alone is correct
Neither 1 nor 2 is correct

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Design of Masonry Structures
Maximum slenderness ratio of load bearing walls for a dwelling having more than 2 storeys(i) Shall not exceed 12 if lime mortar is used(ii) Shall not exceed 18 if cement lime mortar 1 : 2 : 9 is used(iii) Shall not exceed 24 if cement mortar 1 : 6 is used

(ii) and (iii) are correct
(i) and (iii) are correct
(i) and (ii) are correct
(i) and (ii) and (iii) are correct

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Design of Masonry Structures
Consider the following statements regarding provision of chases in masonry,(i) No chase should be permitted in a half brick load-bearing wall,(ii) Vertical chases should not be closer than 2 m in any stretch of a wall,(iii) Chases should be provided near to bearings of beams and lintels.

(i) and (iii) are correct
(ii) and (iii) are correct
(i), (ii) and (iii) are correct
(i) and (ii) are correct

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