11.Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be

12.In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as

13.A 200 mm thick wall made of modular bricks is 5 m long between cross walls and 3.8 m clear height between RCC slabs at top and bottom. The slenderness ratio of the wall is

14.Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall. Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle around only one axis. Select your answer according to the codes given below:

15.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