Calendar: 1883-1884 Page 656

f ο APPLIED SCIENCES SECOND YEAR fflachi Sketch section through pulsometer and explain how water is raised by it Describe the combined forcing and lifting pump and explain with section its mode of action Describe the construction of an accumulator and show the arrangement of valves in the apparatus used for working cranes by hydraulic pressure What is the usual method of packing the rams of hy- draulic presses Up to about what pressure can hemp packing be used in hydraulic machinery Sketch longitudinal section through marine boiler and show how the flat surfaces are stayed Sketch the seam in the plates of locomotive boiler Show the diameter and pitch of the rivets and the lap of the plates taking them at of an inch thick Point out the strains to which the various parts of the joint are subjected when the boiler is in steam In what way may the plates of the internal tube of boiler be strengthened against external pressure without interfering with the end-long expansion and contraction Sketch sectional elevation of double-acting beam engine Point out briefly the use of each of the principal parts Describe three-ported valve Sketch the ports in section Show the valve in the middle of its stroke with- out any lap with lap on the steam side only with lap on the exhaust side only and with lap on both sides Illustrate the effect of the laps by an Indicator figure 10 Sketch an eccentric and show that it produces the same motion as crank and connecting rod 11 Expl ain the method of constructing' parallel motion for compound engine 12 Describe the method of boring out solid core of metal in the manufacture of steel tubes for heavy ordnance at Wnnlwiph