11.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 Of these statements

12.Assertion A : For eccentricity ratio exceeding 1/6, effective thickness of masonry will get reduced. Reason R : For eccentricity ratio exceeding 1/6, there will be tension on one side of the member. Select your answer according to the codes give below:

13.Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have

14.If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is

15.If H is the height of wall between centres of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be