2. A wall of brickwork is 18 inches thick, 4 feet high, and weighs 120 lbs. per cubic foot. What is the maximum depth of water that it will safely retain ? 3. A beam of ironbark 12 inches square and 30 feet span broke with a central load of 40,000 lbs. What weight will be required to break a similar beam under the subjoined conditions— (a) Supported at each end and loaded at quarter span? (b) Fixed at one end and loaded at the other ? (c) Supported at ends and centre, and loaded uniformly? (d) Supported at points 6 feet from each end, and loaded uniformly? 4. Explain carefully how you would determine the Moment of Resistance of a T-iron beam. Which part of the T should be in compression to secure maximum strength? 5. Investigate mathematically the proportions of the strongest rectangular beam that can be cut from a given circular log. 6. Cast iron has a tensile strength of 8 tons per square inch. A beam of it 1 inch square and 1 foot span broke with a central load of 1 ton. ment upon this statement. Com APPLIED MECHANICS. SECOND PAPER, Professor Kernot. 1. Determine both by calculation and by the graphic method the stresses upon the frame illustrated on the blackboard (a) With a load of 5 on each upper apex. (b) With the preceding and also a live load of 5 on each apex passing over the structure. 2. Discuss the stresses upon the frame of a bicycle, and describe an experiment showing that the most approved form of frame is not subject to bending moments. 3. What are the points to be kept in view in designing riveted joints? Design a maximum efficiency joint with -in. rivets for a tension bar 9 inches wide and half-an-inch thick, giving all necessary calculations. 4. What is meant by a "long column"? How does such a column give way, and how should a long column be designed to give a maximum resistance? Quote and comment upon the principal long column formulæ. 5. Explain carefully how you would proportion the shell ends and furnace tube of an ordinary steam boiler, and how you would deal with manholes and domes? 6. Make a neat drawing, with accompanying critical description, of the autographic stress-strain apparatus at the University. CIVIL ENGINEERING.-PART I. FIRST PAPER. Professor Kernot. 1. Give a complete description, accompanied by detailed sketches, of the method of shield tunnelling under compressed air as practised upon the Melbourne Sewerage Works. 2. Describe briefly with sketches the usual methods of constructing embankments (a) For railway purposes. 3. Give a critical description, accompanied by detailed sketches, of the various forms of timber gates in use on lines of railway. What timbers would you prefer to use for the various parts ? 4. Make an outline drawing of the appliances used for manufacturing bar iron. Describe rough tests whereby its quality may be determined. 5. Describe fully the mode of proceeding in order to construct a large arched bridge of bluestone masonry. Give sketches of the various appliances used. 6. Write a short essay on cylinder piers for bridges. CIVIL ENGINEERING.-PART I. SECOND PAPER. Professor Kernot. Supply working drawings and brief specification of any two of the following: (a) Small timber road bridge over creek. Span 15 feet. Height of deck from bed of stream 10 feet. Stiff clay foundation. (b) Cast-iron water pipes, 12 inches diameter, to stand a pressure of 200 lbs. per square inch. (c) A brick bridge, 20 feet span, height from bed of stream to roadway 15 feet, breadth of roadway 30 feet. CIVIL ENGINEERING.-PART II. FIRST PAPER. Professor Kernot. 1. It is required to lay out and construct a main road crossing a heavily-timbered range rising about 1,000 feet in 4 miles. The transverse slopes are steep and the ground rocky. Describe fully how you would accomplish this. 2. Write an essay on the construction of kerbing and channelling for town streets with and without underground drainage. L 3. Give all the information you can as to the mode of constructing town streets and country roads in districts where the soil is fine sand covered with a thin layer of vegetable soil. 4. Make a neat sketch of some form of gripper used for cable tramways. What conditions, in your opinion, should a satisfactory gripper comply with? 5. Give a full description of the Doncaster and Box Hill Electric Tramway, and express your opinion as to the suitability of the system for general use in small and large towns. CIVIL ENGINEERING.—PART II. SECOND PAper. Professor Kernot. 1. Give all the information you can, with illustrative sketches, of the five standard types of locomotive used on the Victorian Railways. In what ways, and for what reasons, do these locomotives differ from those generally used in England? 2. Write a short essay upon the various expedients adopted to facilitate the passage of railway vehicles round sharp curves. |