Calendar: 1890-1891 Page 775

ENGINEERING DEPARTMENT cxm VII -fHamifactuvmg ft1 SECOND YEAR Explain the principle of Watt's parallel motion for connecting the ends of the piston and air-pump rods with the beam of steam-engine Make such sketches as you may think necessary Sketch in section the cylinder of an engine together with the piston rod and cylinder cover showing the methods of keeping the piston and piston rod steam-tight Show by means of three separate sketches any form of slide-valve with which you are familiar Place it in its mid- position on the ports in each of the sketches and show clearly the construction of the valve with no lap with lap on the steam side only with lap on both the steam and ex- haust sides What is the use of fly-wheel as applied to steam- engine How does its action differ from that of Governor Sketch section through Siemens's hydro-chromometric governor and show its connection with the throttle-valve Explain clearly its action in regulating the engine Sketch section through an air-pump for an engine showing clearly the construction of the bucket and foot and delivery valves Which valves are open during the descent of the bucket Sketch vertical section through the fire-box and tubes of marine boiler showing the methods of strengthening the flat surfaces What object does the combustion chamber fulfil Sketch three diagrams showing the amount of work obtained from given weight of steam at451bs pressure above the atmosphere when used in an engine without expansion or condensation when the steam is cut off at half stroke but not condensed when the steam is cue off at half stroke with condensation Explain with the necessary sketches the construction of the cataract of Cornish pumping-engine and the manner in which it operates upon the steam-valve of the engine