APPLIED MECHANICS.

FIRST PAPER.

The Board of Examiners.

Only FIVE questions to be attempted.

1. Give the usual formula employed for deducing the pressure on a plane surface from the velocity of the wind. State the maximum wind velocities and pressures that have been recorded at the Melbourne Observatory, and discuss the stability of railway carriages and chimneys under them. 2. A pottery furnace consists of a brick cylindrical tower surmounted by a dome which may be taken as about one fourth of a sphere. Discuss the state of stress in this structure, and indicate any special precaution against failure that you would take.

3 Define the term Bending Moment. Draw the diagram of Bending Moments of a beam supported at each end and loaded with a uniformly distributed load

(a) Over the whole span.

(b) From one end to the centre.

4. A wrought-iron plate girder consists of a web 12 inches x inch, four angle irons 3 inches x 3 inches x inch, and flange plates 8 inches x inch. The ends are stiffened by continuing the angle irons round them. Compute the strength of this girder, the span being 20 feet, and the load uniformly distributed along the

top member; also determine the arrangement of 2-inch rivets connecting the angle irons with the flanges and web.

5. What is meant by a Hodgkinson Beam? Draw a dimensioned cross section of such a beam, and show how to determine its Moment of Resistance.

6. What is meant by the Schwedler Method of designing riveted joints. Design and compute strength and efficiency of a riveted joint connecting a tension diagonal 8 inches wide and inch thick with the trough-shaped top chord of a large lattice girder.

7. The holding-down bolts of a large crane are made of wrought iron 3 inches square. Design the ends of this bolt, one end having a screw and nut, and the other a cottar, giving all necessary calculations.

APPLIED MECHANICS.

SECOND PAPER.

The Board of Examiners.

Only FIVE questions to be attempted.

1. What is meant by an eye-bar? Give an account of the various experiments that have been made to determine the best proportions of eye-bars and their pins, and design a steel eye-bar having an ultimate statical strength of 200 tons. Indicate the best mode of arranging a series of eye-bars on a pin in an American truss bridge.

2. Make an outline drawing of a roof consisting of horizontal tie, sloping rafters, central vertical, and two struts extending from the foot of the central vertical to the centre of each rafter, the height being one-third of the span. Determine the stresses

(a) With a load of 10 at the centre of each rafter and at the ridge.

(b) With a normal wind pressure of 10 at the centre of one rafter and 5 at the ridge.

(c) With the above loads in combination.

3. A suspension bridge consists of a chain of parabolic form, numerous vertical suspension rods, and a stiffening girder hinged at the ends and centre. Determine the tension of the chain at ends and centre, and the state of stress in the stiffening girder

(a) When loaded uniformly throughout.

(b) When loaded from one end to the centre.

4. Write an essay on the resistance to collapsing of furnace tubes of steam boilers, and illustrate it by designing a wrought-iron furnace tube 3 feet diameter and 12 feet long to resist a working pressure of 100 lbs. per square inch.

5. State the principal facts connected with the deflection of beams. A beam of cast iron 3 feet span and 1 inch square deflects inch with a load of 400 lbs. What will be the deflection of a beam 2 inches wide, 4 inches deep, and 6 feet span, with a distributed load of 4,000 lbs. ?

6. Describe the University Testing Machine, and state what advantages a machine of this form possesses over other types used elsewhere.

7. Define and illustrate statical, primitive, and vibrative strength, and explain how the recognition of these different kinds of strength has modified the design of lattice girders for railway purposes.

CIVIL ENGINEERING.-PART I.

FIRST PAPER.

The Board of Examiners.

1. Make a set of detailed sketches, with descriptive notes, of a Steam Navvy; explain how it is used, and for what purposes it is most suitable.

2. Give a general sketch of the English, Belgian, German, and Austrian systems of tunnelling, and discuss their relative advantages.

3. Give the common and botanical names of the local timbers used by engineers, under what circumstances should each of them be employed, and to what defects are they most liable.

4. Describe the usual mode of driving piles. What are the difficulties most usually met with and how are they overcome? Give a rough rule for determining the proper test of a pile to carry a given steady load.

5. Describe the appliances to be seen in a well-equipped foundry, and explain the process of casting a steam-engine cylinder.

6. Describe, with sketches, an engineers' lathe; and explain how you find the pitch of a screw cut with any given arrangement of change wheels.

7. Describe carefully the dry and plastic methods of making bricks by machinery, and give the tests you would apply to determine the quality.

8. Describe the method of dressing blocks of bluestone for ashlar masonry.

CIVIL ENGINEERING.-PART I.

SECOND PAPER.

The Board of Examiners.

1. Supply working drawings and specification of material and workmanship for any two of the following:

(a) A strong post and rail fence sheep proof, with a suitable gate large enough to permit the passage of a waggon or threshing machine. State what modifications you would make in this fence and gate in a district when timber was scarce and fences needed to be rabbit-proof.