Puslapio vaizdai
PDF
„ePub“

how would you go about it, and what would you actually do? How would you record your measurements? You are not able to see the monuments from each other, due to obstructions.

(b) On the accompanying note sheet make out samples of notes you would use.

(c) How would you calculate the lengths and bearings of the lines from monument to monument from the survey you have made from your transit lines?

8. A bench mark has an elevation of 81.20, and the bottom of a foundation is to be 75.00. Describe how you would mark a point on a post, on the edge of the excavation, for the foreman, which point will be just 5' 6" above the foundation bottom. Show your Field Notes for the work.

FACULTY OF PRACTICAL SCIENCE.

SURVEYING II.

1. Prove geometrically that, using Latitudes and Departures, A (D.M.D. x lat.)

2. (a) An 8° 00' turnout is to be run from a 4° 20′ curve, and is of opposite flexure. Determine the frog number and the length of lead.

(b) A curve (Chainage P.I. 184+27.2) has ▲=24° 12′ R. and a length of 808.3 ft. It is found necessary when on revision of location to swing the forward tangent 1° 15' farther R. to escape a rock cut. What is new D, new and old E. C's, and new and old E's, if the B.C. is to remain unchanged?

3. A street cross-section has been laid out as follows:

[blocks in formation]

If the road is 35′ in width and the crown is 1/25 of its distance from gutter, find position of string from curb top to curb top with reference to surface of pavement at points 10' from each curb.

4. (a) Give the United States Coast and Geodetic Survey solution of the three point problem when using the plane table.

(b) Explain fully the method of "running on contour" in Topographic surveying when using stadia in the transit. Give headings for the notes required.

5. (a) Explain the requirements of a first class land plan. (b) Give the methods of plotting the same.

6. (a) In laying out a bridge having two rectangular river piers 8' x 30', how would you proceed? Use a diagram.

(b) A sewer is laid out as follows: Elev. of B.M. =121.62, Elev. of invert 115.00 at sta. 5+00, and 117.00 at sta. 9+00. If the sewer is between 8′ and 9' deep, give a set of level notes for marking crossheads at stas. 5, 6, 7, 8, and 9. Also show how you could calculate the quantities of excavation to be removed.

7. (a) Give in detail the adjustments of the sextant.

(b) Explain and prove geometrically the reason for graduating the arc of a sextant in the manner in which it is done.

8. Discuss the methods of keeping notes.

9. If you had to make a survey of a block of land, which was originally laid out in 1822, how would you go about it? 10. (a) Deduce the formula for flow over a weir.

(b) Calculate the discharge of water over a weir 122.0 ft. wide, water 5' deep, over crest, velocity of approach 4' per sec., weir coeff. 0.8.

FACULTY OF PRACTICAL SCIENCE.

SURVEYING IV.

1. Azimuth observation on Polaris.

Date, Nov. 1st, 1913.

Time, 8h. 15m. P.M. Eastern Standard Time.
R.O. Hor. Circle 0° 0'.

Star Hor. Circle 137° 46'.

R.A. Polaris 1h. 30m.

Dec. Polaris 88° 51'.

Sid. Time, Mean noon Greenwich 14h. 41m.
Lat. 44° 13'.

Long. 76° 29'.

Ratio of Sid. to mean time interval, 1.002738.

[ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small]

Find the horizontal distance from 101 to 201, and also the elevation of 201. Sights were taken with main telescope.

3. State concisely the routine you would adopt in making an observation on the sun at noon for latitude, and the steps you would take to reduce the observation.

4. In measuring a base line with steel tape, what corrections should be applied? State exactly how you would make each correction.

5. Show by an example how you would find the probable error of the mean of three unequally weighted observations of one quantity. What is meant by the "General mean"?

Dominion Land Surveying.

6. (a) Describe the 4th system used in D.L. Surveying, noting in what way it differs from the 3rd system.

(b) In the 3rd system, how do surveyors mark the lines surveyed, and show the stakes planted to mark sections 16 and 21, Tp. 12, Pa. 14, W. of the 2nd Principal Meridian.

7. (1) What is (a) the Tp. north of the 30th Correction Line, (b) The Tp. south of the 4th base, (c) the long. of the 5th Principal Meridian?

(2) How are the block lines surveyed and how are they run out in the 3rd system? To what meridian are the bearings in a township referred, and what is the amount of convergence per section?

8. How would you survey legal subdivision 15, of section 2 5(3rd system) if required to mark it off in the field?

Ontario Land Surveying.

9. In a double fronted concession the block corner is lost. How would you determine its location?

10. What in the accompanying plan are the systems of survey marked "A", "B", "C", "D"?

11. In the accompanying sketch, how would you run the line?

(a) between lots 13 and 14 in plan marked "D";
(b) between lots 13 and 14 in plan marked "C".

12. (a) Define and explain how you would actually find in the field the following: (1) Front of concession; (2) Governing line.

(b) Describe the different kinds of governing lines.

« AnkstesnisTęsti »