Calendar: 1879-1880 Page 638

638 APPLIED SCIENCES XII- Cijr Morkiljop THIRD TEAR What should be the speed of lathe in turning 1J in in and 2£ in shafting Cut should be at the rate of 20 feet per minute The leading screw of lathe is to the inch what wheels would you use to give feed of 15 cuts to the inch The cylinder of our workshop engine is in diameter 16 in stroke cut off at$ Work out from recollection of speed and pressure the average horsepower when the machinery in the shops is at full work From recollection of lowest working pressure work out the power required to drive the engine shafting driving bands and loose pullies there are 170 feet of shafting pairs of mitre wheels 35 driving bands with their loose pullies Sketch the feed motion of the new Whitworth slotting machine Describe the special class of work the slotting machine is best adapted for and the peculiar form of tools SECOND YEAR In wood turning light work describe the advantage of small lathe with light fly-wheel over those of heavier size What is fair average speed of cut for wood turning Describe the difference in form and the application of tools for soft and hard wood turning Describe the process of dressing and tempering chipping chisel What is the range of angle of the cutting edge of chipping chisel and the conditions that regulate it Sketch and describe the heel tool and other tools for hand turning in metal Sketch the arrangement of bands and pullies for the quick return in Whitworth's screw cutting lathe