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
ans: to prevent absorption of moisture from motar when it is used with it
14.main purpose of providing frong in brick
ans:to form keyed joint between brick and motar
15.brick is manufactured by the process called
ans :tempering
16.what does 415 in fe415 means?
Ans:415 means the tensile strength of steel
17.what do 20 means in M20 grade
Ans:it means the compressive strength of concrete
18.what are the test performed on cement at site
Ans:1. Colour test
2.adulatration test
3.lump test
4.temperature test
5.check whether their is IS mark
6.date of manufacture
7.setting time test
19.mimimum and maximum setting time of cement
Ans:initial is 30 min and final is 10hours
20.maximum angle at which the stair should be inclined
Ans:40 degree acording to is code
21.different types of cement
Ans:1.portland cement
2.portland pozzolana cement
3.portland clag cement
4.low heat cement
5.rapid hardening cement
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