169) 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

170) For masonry work with solid bricks, consistency of mortar should be

171) Water retentivity for brick masonry should not be less than

172) Minimum compressive strength in N/mm2 for H1 type mortar used for masonry is

173) Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have