Calendar: 1898-1899 Page 774

CXlU FACULTY OF SCIENCE What is resilience υ steel bar inches square section and 40 feet long has limit of elasticity of 20 tons per sq inch What is its resilience 30 000 000 lbs Design horizontal rivetted joint for boiler of ft internal diameter to work at 100 lbs boiler pressure per sq inch The boiler is of steel in which working stress of 000 lbs per sq inch is allowed What is meant by an epicyclic train Show how to find the relative revolutions of the arm and of the last wheel of the train 10 In an epicyclic train the last wheel of the train moves in the same direction as the arm but faster so that in 21 600 revs of the arm the last wheel has made 21 601 revolutions How many axes will there be and how will you arrange the wheels 11 What is meant by the Carnot Cycle for the steam engine Compare the efficiency of an engine which uses lbs of coal per per hr when its boiler pressure is 150 lbs per sq in 366 and it exhausts into the atmosphere with an ideal Carnot engine working between the same limits XXI -Geometrical ratotng Explain the following terms and make illustrative sketches where possible tangent-prism-segment-trun- cated cone envelope isometric chord axis rolling parallel-scale-horn-centre-protractor- ellipse develop- ment -section-pen-concentric rectangular block 4J inches by and having thickness of f" Upon this stands cylinder of 3" diameter and axis the axes of the block and cylinder being in the same vertical line Give isometric projection of the two objects Draw line fths of inches long and divide it into eleven equal parts Draw line 789 inches long and divide it into four parts in the proportion of 22 51 7093 ג