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MECHANICAL ENGINEERING.

The Board of Examiners.

1. Describe briefly the principal types of water-wheels,

stating roughly the best efficiency obtained with each.

2. Describe briefly the different kinds of turbines.

Why has a greater efficiency been obtained than

Rankine and Weisbech anticipated ? 3. Give a sketch of Hooke's universal joint. What

are its disadvantages ? In what class of machinery is it most used, and why is it suitable for this class ?

4. A steam-engine is required to develop 100 indicated

horse-power, the boiler pressure is 120 lbs., cutoff at quarter stroke. Determine dimensions of the cylinder, piston-rod, and connecting-rod.

5. Describe the original Otto and Langen gas-engine,

and give the reason of its efficiency.

6. Make sketches and give a description of a modern

marine boiler.

7. How would you proceed to carry out a fair engine

test ? Describe all the apparatus required.

HYDRAULIC ENGINEERING.

The Board of Examiners.

1. It is required to erect a concrete wall across a rocky

gorge in Victoria, for the purpose of storing water. The width is 1,000 feet, and depth of water stored 100 feet. Concrete of specific gravity 2.25 can be obtained. The distance from the face of the wall to the opposite end of the reservoir is one mile, the direction being that of the most severe winds. Give a section suitable for the dam, and show how it should be modified in the event of the dam being erected in a country exposed to severe frosts.

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2. It is required to provide a water supply for a com

pact town with 2,000 inhabitants, situated on the high bank of a constantly running river, and distant 10 chains from the summer channel, the intermediate ground being liable to floods. The country may be assumed to be flat, and a gravitation supply impracticable. The town is 40 feet above summer level, and 10 feet above the highest flood mark. Describe how you would supply the town, mentioning particularly the amount, elevation, and character of storage provided, the character and size of the machinery required, the nature and size of inlet provided, and the sizes

of connexions between pump, storage, and town. 3. Describe briefly the method of manufacturing small

sized cast-iron pipes, paying particular attention to the precautions which must be taken to secure good castings.

Mention the principal defects to which such castings are liable, and state how you would proceed in inspecting and testing them.

4. What are the advantages and disadvantages of the following methods of sewage disposal

(a) Chemical Process.
(6) Downward Filtration.
(c) Sewage Farming.
(d) Discharge into the Sea.

MINING.

Mr. William Nicholas.

1. Give some information regarding the nature of

chutes of ore, and the geological circumstances that have been found to affect them.

2. Describe briefly the construction of diamond drills,

and how they are worked.

3. Explain the working of a mine on the pillar and

stall system, and state under what circumstances this method is employed.

4. How would you put in a drive in loose ground ?

Illustrate by a diagram.

5. Under what circumstances would it be advisable to unwater a mine by means of

(a) A syphon.
(6) A tank.
c) A pulsometer.

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6. Compare the advantages and disadvantages of

hempen and wire ropes for hauling purposes. 7. Describe a Frue Vanner, and illustrate description

by a sketch. 8. Sketch a safety-hook, and 9. An over-winding brace, and describe the benefits

derived by their use. 10. Give description of a Cornish flue boiler. State

the general test pressure in pounds per square inch of a new boiler made of best quality iron,

and its safe working pressure. 11. Sketch in section a shaft with main and escape

drives of an alluvial mine. Describe the reasons

for their construction. 12. What are the beam and balance bob of a pumping

engine, and describe how they are connected ? 13. What kinds of rock require gunpowder or nitro

glycerine compounds for blasting; state reasons for using each explosive.

Note.-The values of replies to questions will be

enhanced by the styles of writing, composition, and sketches.

METALLURGY.

The Board of Examiners.

1. Explain fully the terms metal and alloy. State the composition of brass, pewter, gun-metal, and standard gold.

2. Describe fully the assay of coal.

3. What is cerussite? How may the metal it contains be extracted? Give the chief physical and chemical properties of the metal.

4. How is silver extracted from a copper matt?

5. Describe two methods for the conversion of cast iron into malleable iron.

6. Describe fully how you would proceed if required to make an assay of some auriferous quartz.

7. Give the names and formulæ of the chief ores of the following metals:-Tin, copper, lead, silver.

PHYSIOLOGY.

The Board of Examiners.

1. Give an account of the Structure and Functions of the Olfactory Mucous Membrane.

2. How does diet affect the excretion of urea?

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