details. Give as far as possible numerical particulars as to the size, weight, and power of the engine, and show how to obtain the tractive force and desirable adhesion load. Mention the names and functions of the various parts, and comment upon the design from a traffic point of view. 2. Describe fully the staff and block systems of railway working, and explain how it was that they failed to prevent collisions at Werribee and Windsor respectively. 3. Give all the information you can as to modern developments in passenger rolling-stock for long journeys. 4. Write a short essay on the construction of break waters. 5. Describe fully the various methods that have been used to facilitate passenger and goods traffic in harbours having tides of 20 feet and upwards. MECHANICAL ENGINEERING. FIRST PAPER. The Board of Examiners. N.B.-All the questions are of equal marking value. Students are not expected to attempt to answer more than FIVE (5) questions. 1. Shew the best mode of driving a centrifugal pump from a portable engine 20 feet distant, the pump being capable of raising 60,000 gallons per hour to a height of 30 feet. Calculate the dimensions of belt which you would use. 2. Explain the advantage which involute curves have as profiles for teeth in gear wheels. Make a drawing of such teeth and calculate their strength. 3. Calculate the theoretical and probable practical efficiencies of an engine giving the following results: Boiler pressure (absolute) Condenser pressure (absolute) 110 lbs. ... 3 lbs. Temperature of feed water 116° Fahr. per hour 4. Calculate the dimensions of a vertical factory shaft 80 feet high, power required being 65 horsepower at 20 feet up, 50 horse-power at 40 feet, 40 horse-power at 60 feet, and 25 horse-power at 76 feet, assuming suitable velocity and material, &c. 5. Design the pivot and bearings for the shaft mentioned in the last question, and estimate the power lost in friction. 6. Make sketches of suction valves (a) suitable for a sewerage pump raising 1,000 cubic feet per minute, (b) suitable for a town water supply pump raising the same quantity. And explain clearly why many engineers prefer to use a large number of small valves to a few large valves giving the same water-way in this latter service. 7. Make a sketch of a grab to raise about one ton, to be worked by a single chain. 8. Describe clearly the mechanism of the celebrated Maxim machine gun. 9. In an electric tramway the length of line is four (4) miles, the number of cars is four, of 15 E.H.P. each, the cost of line and station is £21,000. Estimate the probable cost per car mile on a basis of Melbourne prices. 10. Calculate the dimensions of a wire rope for a telpherage system. Bucket when full weighs 30 cwt., maximum distance between posts being 80 feet. MECHANICAL ENGINEERING. SECOND PAPER. Students are not expected to attempt questions yielding more than about 100 marks in the aggregate. 1. Construct a velocity diagram for the cross-head of an engine, stroke five (5) feet, length of connecting rod ten (10) feet; and shew, either by scaling on diagram or by calculation, what the difference of the maximum velocity would be if the connecting rod were infinitely long when the engine makes 60 revolutions per minute.-[25 marks.] 2. Make a set of sketches of an ordinary steam winch for winding a wire rope with a working tension of three thousand (3,000) lbs. round a fifteen (15) inch drum. Shew as many details and dimensions as you can.-[40 marks.] 3. Explain why the indicator diagrams taken from a cylinder jacketed with live steam differs from the diagrams from the same cylinder when not so jacketed, and mention some types of engines which are seldom jacketed.-[15 marks.] 4. Make a sketch of a marine type of boiler, shewing constructive details, and calculating the leading dimensions required to develope six thousand (6,000) lbs. of steam at 70 lbs. gauge pressure per hour.-[30 marks.] 5. Describe the effects of annealing on wrought iron under different conditions.-[15 marks.] 6. Draw a section through the double-geared arrangement commonly used in lathes which are intended to work both wood and metals.-[15 marks.] 7. Calculate the sizes of shafts required for a horsepower to be worked by four (4) horses and geared to five times the speed. Calculate also the leading dimensions of the teeth and of the universal joint employed.-[40 marks.] 8. Explain how the Atkinson gas engine gives the complete cycle of operations at every revolution. -[25 marks.] 9. Describe a pump suitable for use in tunnel work or excavation to discharge at least six thousand (6,000) gallons per hour to a height of fifty (50) feet. [20 marks.] 10. Sketch a governor and variable cut-off suitable for a stationary engine of about 100 horse-power.[25 marks.] HYDRAULIC AND SANITARY ENGINEERING. FIRST PAPER. The Board of Examiners. Design a scheme of water supply for the township shewn on the accompanying plan. The number of tenements is 150, and the rateable value £2,500 per annum. The rating power is limited to 2s. in the £. The following are the ruling prices of certain materials, &c.; Melbourne prices may be accepted in other cases : Cast-iron piping, delivered in township, £5 Steam machinery, including boilers and |