1. the standard size of brick ans:19x19x9(mm) 2.crusing strenght of first class bricks ans:105 kg/cm2 3.water absorption for good brick should not be more than ans:20% 4.compression strenght of common building bricks should not be less than ans: 3.5 N/mm2 5.number of standard bricks in one cubic metre of brick masonary is ans : 500 6.identification provided in the face of brick is ans : frog 7.a layer of dry bricks put below the foundation concrete in case of soft soil is called ans :dpc 8.hollow bricks are generaally provided for ans : for providing insulation against heating 9.when brick is cut into 2 parts longitudinally it is called ans: queen closer 10.red colour of brick is due to the and: iron oxide 11.brickwork is measured in square metre in case of ans :honey comb brickwork ,brick flat soiling , partition walls or half brick walls 12.brick wall are measured in square metre if the thickness of the wall is ans:10 cm 13.what is the purpose of soaking of brick before its use