3. What are the principal gauges that have been used for railways, and what are the arguments for and against each of them? What is your own opinion as to the desirable gauge for future extensions of the Victorian Railways?

4. It is required to carry tourists to a pleasure resort situated on a mountain that rises 4,000 feet in 4 miles. Describe the form of locomotive and rolling-stock you would employ.

5. Write an essay on Commercial Docks in tidal

waters.

6. Give all the information you can as to modern modes of illuminating light-houses.

MECHANICAL ENGINEERING.

FIRST PAPER.

Professor Kernot.

1. Make a neat sketch approximately to scale of one of the following; give the names and describe the uses of the various parts; indicate briefly the conditions to be complied with in order that the best possible result may be obtained from them; and state that result numerically :

(a) A windmill for pumping water to a height of 50 feet.

(b) An inward flow turbine for a fall of 10 feet, and a water supply of 10 cubic feet per second. (c) An oil engine of about 8 actual horse-power.

2. Write an essay on one of the subjoined subjects—(a) Methods of utilizing human power to drive machinery.

(b) The indicator, the mode of using it, the results obtained, and the principal sources of error to be guarded against.

(c) Centrifugal and other governors.

3. Make a detailed sketch with full description of either the Corliss or the Rowland Richardson valve gear for steam engines.

4. Make an outline sketch, omitting minor details, of a large triple expansion marine engine.

MECHANICAL ENGINEERING.

SECOND PAPER.

Professor Kernot.

1. The screw-shaft of a steamer has to convey 1,000 horse-power at a speed of 100 revolutions a

minute.

Calculate its diameter, and determine dimensions and arrangement of couplings, coupling bolts, bearings, and thrust block.

2. The cylinder of a non-condensing steam-engine is 20 inches diameter, and the length of stroke 40 inches. Steam at 100 lbs. per square inch is admitted and cut off at one-quarter stroke. Draw the indicator diagram and compute the power, allowing for a clearance of 5 per cent.

3. Supposing the steam in the engine mentioned in the preceding question was cut off at onetwentieth of the stroke, draw the indicator diagram and discuss it.

4. What is the Zeuner diagram? Draw such a diagram for a simple slide-valve, cutting off at seven-tenths of the stroke, and exhausting at nine-tenths.

5. An Otto gas-engine has a cylinder 6 inches diameter and 6 inches stroke, and makes 180 revolutions a minute. Describe its action, còmpute its probable power, and explain how you would verify the result by means of a friction brake.

6. Determine the grate area, heating surface, and probable consumption of fuel and water of a boiler for a compound condensing engine of 300 indicated horse-power; pressure 100 lbs. per square inch. State also amount of condensing water required.

7. What would be the effect on the performance of the above boiler of raising the feed water from 100° to 200° Fahrenheit?

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

FIRST PAPER.

The Board of Examiners.

1. Give a full description, illustrated by sketches, of the more important details, of one of the following works :

(a) Yan Yean and Silvery Creek Waterworks. (b) Melbourne Corporation Desiccator Works.

2. Compute the dimensions and prepare an estimate of cost of a line of main pipe, 3 miles in length, to deliver 200 gallons per minute, with a fall in the hydraulic grade line of 20 feet in the first mile, and 40 feet per mile for the rest of the distance. The average depth of cutting is 3ft., in clay. Present ruling prices to be adopted for the various descriptions of work.

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

SECOND PAPER.

The Board of Examiners.

Prepare sketches for working drawings, including plan, section, and elevation as seen from down

stream, to scale 4 feet to 1 inch, for one of the following works:

(a) An earthen dam with outlet works for two 36-inch mains, suitable for the situation shewn on the accompanying plan. The by-wash level is at 156 feet. Provide for a flood of 300,000 cubic feet per minute.

or (b) A timber weir to raise the water level to 150 feet on the site shewn on the accompanying

plan.

HYDRAULIC AND SANITARY ENGINEERING (INCLUDING IRRIGATION).

THIRD PAPER.

The Board of Examiners.

Draw up specifications, illustrated with marginal sketches where necessary, for each of the following works:

(a) Construction of 1 mile of irrigation channel in a clay loam, average height of bank to be 3 feet, bottom width of channel 10 feet, and depth of water 3 feet.

(b) Construction of a wrought-iron subway 24 inches in diameter under the above channel.

(c) Clearing and grading, for the purpose of wheatgrowing, of a square paddock of 10 acres of mallee land heavily timbered, having an even slope of about 4 feet per mile.