Eom-1 paper 7

31,The method of sinking through loose deposits of sand upto 60m is ?,

piling,

open caison,

forced drop,

cementation,

32,The method of sinking through alternate loose and tough strata upto 60m?,

piling,

open caison,

forced drop,

cementation,

33,The method of sinking where there is ground filling problem or considerable inrush of water uptp depth of 30m?,

piling,

open caison,

Pneumatic caison,

forced drop,

34,The method of sinking in unstable or friable strata with heavy inrush of water?,

tubbing,

forced drop,

cementation method,

freezing method,

35,In freezing method of shaft sinking which is used for circulation?,

HCl,

HNo3,

CaCl2,

NaCl,

Ans: 2, 3, 3, 4, 3