running maintenance and cleaning of central lab, ces office, apwd, port blair during 2020-21. sub work supply installation and commission of scientific civil engineering of lab equipment phase i-supplying of core drilling machine petrol engine 5 hp with pavement core drilling machine oetrol engine powered road building drill has been designed specially for the purpose of drilling test cores from or holes in, roads airport runways, bridge etc. the machine comprises of two vertical support columns which carry the drill head / engine essembly with the help of screwed spindle. the 5 hp petrol engine with pulley mechanism work with minimum vibrations. the double precision bit advances the screwed spindle which provides a constant, accurate drill pressure, minimum core chipping and long bit life. the complete assembly is supplied on a rigid metal, base with leveling facilities and is suitable for vertically down coring application only emil / lawrence and mayo / en kay enterprises make of equivalent drill speed : single speeddrive : 5 hp petrol engineguide shafts : 50 mm diawater tap ; 12 mm 2 supplying of diamond core bit: thin wall impregnated daimond copre bit with extension barrel and adaptor having a rod connection emil / lawrence and mayo / en kay enterprises of make equivalentsize: i.d.4 x o.d. 4.3 - 12 long. 3 supplying of lynx test seives as per is 460 - 1962 for pine aggregate 8 dia brass frame. 4 size 1.18 mm 5 lid and pan for the above 6 size: 90 microns 7 size: 76 microns 8 supplying of liquid limit device - hand operatedconformng to is : 2720 ( part 5 ) it consist of a brass cup held on an adjustable bracket. the cup can be adjusted for a fall of 1 cm and can be raised and dropped on a rubber base of standard hardness by cam action complete with one cosagrande grooving tool, one astm grooving tool, and a hieght guage block ( type a of is 9259 ) fitted with a counter to register the number of blows emil / lawrence and mayo / en kay enterprises or make.equivalent 9 supplying of lynk vicat needle apparatus conforms to i.s. 4031 and i.s. 5513 ) this instruments is suitable for determining the initial and final setting time of cement mortar and consistency of other materials too, it comprises of a vicat frame with a bearing rod, having a cap at one end; a vicat mould- either split of single piece type with a glass base plate; an initial needle; a final needle and a consistency plungeramil / lawrence & mayo / en kay enterprises of make. equivalent