Calendar: 1886-1887 Page 701

APPLIED SCIENCES 703 causing them to separate Find also the position of the centre of gravity of the three discs 10 smooth rod AB ft long and weighing 10 lbs is attached by hinge at to fixed point cord CD 1£ ft long fixed at is tied at to ring without weight which passes over the rod The line joining CA is horizontal and feet in length find the tension of the cord -fHamtfacturing &rt anffl JtHacfjmerg SECOND YEAR Describe the construction of an accumulator intended for working hydraulic machinery Sketch section through the accumulator and the pumps for supplying it Give your reasons for excluding air from the accumulator Name some of the machines worked by hydraulic pressure Sketch section through balanced lift and explain its construction Describe with sketches the construction of hydraulic crane show the arrangement of the chains and pulleys for lifting and of tho valves for slewing the crane and bringing it to rest To what pressures are the street mains for conveying water subjected How are the thicknesses of the pipes determined Sketch section through spigot and faucet י joint Sketch section through plunger and force-pump worked by beam-engine with crank and connecting-rod show its connection with the air vessel For what purpose is an air vessel emplojred Sketch section through Cornish double-beat valve Explain the principle of its construction stating its advantages over an ordinary Disc' valve Explain with sketch the principle of Watt's parallel motion Show how the piston-rod is guided in Grass- hopper' engine