approximately in the prime vertical, the interval between the two passages being two hours sidereal time. The altitude at eastern passage is observed to be 10' greater than at western passage. Determine the latitude of the place, and the true azimuth of the plane swept out by the line of collimation. 2. Reduce the levels given by method of rises and falls, and by collimation method, and give all necessary checks: : 3. Describe the methods adopted in mining surveys for transferring azimuths from the surface to the underground workings. SURVEYING, LEVELLING, MENSURATION, AND DRAWING. THIRD PAPER. Mr. Fowler. 1. Deduce the formula for the volume of a sphere. 2. A shell of cast iron 15 inches diameter weighs 150 lbs. What is the thickness of the shell, and what would its weight be if filled with mercury Specific gravity of mercury is 13.6. ? 3. It is required to excavate an earthen tank of 1,000 cube yards capacity, in level ground, the bottom being 20 feet square, the end slopes 4 to 1, and the side slopes 13 to 1. What will the depth be? ADVANCED SURVEYING. FIRST PAPer. Mr. Fowler. 1. Plot a section from the levels given below, and grade it for main road traffic. tion levels, depths of cuttings, and heights of Figure in forma banks; draw cross sections at 12 chains and 20 chains, and indicate what provision you would make for flood water. 2. Sirius is observed on 7th November, 1895, in latitude 37°48' south, longitude 9 hrs. 40 min. 14 sec. east with a transit theodolite in good adjustment, the observed altitude being 40° and the star being easterly. What is the standard time at instant of observation? The following information is extracted from the Greenwich Nautical Almanac :— Sirius R.A. 6 hrs. 40 min. 34 49 sec. Decl. S. 16° 34′ 8.9". Sidereal time at mean noon 7th, 15 hrs. 5 min. 44.79 sec. Sidereal time at mean noon 8th, 15 hrs. 9 min. 41.34 sec. Mean time transit of 7th, 8 hrs. 52 min. 47.69 sec. Mean time transit of 8th, 8 hrs. 48 min. 51.78 sec. ADVANCED SURVEYING. SECOND PAPER. Mr. Fowler. 1. Describe fully the methods adopted in measuring the base lines of a geodetic survey. 2. How would you fix the positions of soundings taken on a shoal, distant about 10 miles from a coast line having no prominent landmarks or hills of altitude exceeding 30 feet? 3. A channel is 50 feet wide, the centre line is curved to a radius of 120 feet, and the water in the centre flows with a velocity of 16 feet per second. What will be the difference of level at the two sides? 4. What are the chief points to be kept in view in fixing the site of— (a) A bridge over a river subject to heavy floods. (b) A cemetery. 5. What is the virtual grade of a railway? Show by an example how such a grade is drawn. APPLIED MECHANICS. FIRST PAPER. Professor Kernot. 1. Define a structure and a machine. What branches of physical science should be understood in order to design structures and machines properly? 2. On the Znin Railway, Germany, the gauge of which is 2 feet, covered goods trucks 21 feet long, 6 feet high, and having the floor 1 foot from the ground, are in use. Compute the overturning wind pressure, the weight being 2.3 tons, and discuss the safety of these trucks under conditions such as obtain in Victoria. 3. Prove that a masonry dam of rectangular section is no more stable than one having a right-angled triangular section of the same height and base. Explain how and why the latter form of dam is modified to suit practical conditions. 4. Draw carefully to scale bending moment and shear diagrams of a beam 20 feet long, loaded with 1 ton per foot in length (a) Supported at each end. (b) Supported at the centre. (c) Supported at two efficient points. DD |