Name of the College : Kings College of Engineering
University : Anna University Chennai
Department : Civil Engineering
Subject Code/Name : CE2254 Surveying II
Year : II
Semester : IV
Degree : B.E
Website : kings.ac.in
Document Type : Question Bank
Download : https://www.pdfquestion.in/uploads/ki…eying%20II.pdf
Kings Surveying II Question Bank
UNIT-I
Part-A (2 Marks) :
1. Define Tacheometer :
It is an ordinary transit theodolite fitted with an extra lens called analytic lens. The purpose of fitting the analytic lens is to reduce the additive constant to zero.
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2. Define Substance bar :
A Substance bar is manufactured by Mr. Kern. The length of the substance bar is 2m (6ft) for measurement of comparatively short distance in a traverse. A Substance bar may be used as a substance base. The length of the bar is made equal to the distance between the two targets.
3. What do you mean by Fixed hair method :
In this method, the stadia wires are fixed (or) fitted at constant distance apart.
4. State Stadia intercept :
The difference of the distance between the top and bottom cross hairs is called as staff intercept
5. What do you mean by tangential method :
In this method, the stadia hairs are not for taking readings. The readings being taken against the horizontal cross hair.
6. The tangential method :
In this method, the stadia hairs are not for taking readings. The readings being taken against the horizontal cross hair.
7. What is the principle of stadia method :
The method is based on the principle that the ratio of the perpendicular to the base is constant to similar isosceles triangle.
8. What are the systems of tacheometry measurements :
The stadia system
The tangential system
Measurement by means of special instrument.
9. Define Sub tense method :
In this method stadia interval is variable. The staff intercept is kept fixed while the stadia interval is variable lines.
10 State Staff intercept :
The difference of the reading corresponding to the top and bottom stadia wires.
11. What are the merits and demerits of movable hair method :
Merits :
Long sights can be taken with greater accuracy than stadia method
The error obtained is minimum
Demerits :
The computations are not quicker
Careful observation is essential
12. Define Analytic lens :
Analytic lens is an additional lens placed between the diaphragm and the objective at a fixed distance from the objective. This lens will be fitted in ordinary transit theodolite. After fitting this additional lens the telescope is called as external focusing analytic telescope. The purpose of fitting the analytic lens is to reduce the additiveconstant to zero.
13. Define Tacheometry :
Tacheometry is a branch of angular surveying in which the horizontal and vertical distances (or) points are obtained by optional means as opposed to the ordinary slower process of measurements by chain (or) tape. , plumb bob, wooden· pegs.
Part-B
1. Calculate the horizontal and vertical distances using tangential tacheometry when both the observed angles are angle of elevation and angle of depression. (16)
2. Explain the procedure of estimating the horizontal and vertical distances where the line of collimation is inclined to the horizontal and the staff is held normal to the line of collimation (16)
3. The following readings were taken on a vertical staff with a tacheometer fitted with an anallatic lens and having a constant of 100. (16)
Staff station Bearing Staff readings Vertical Angles
A 47010’ 0.940 1.500 2.060 800’
B 227010’ 0.847 2.000 3.153 -500’
4. Explain the procedure of estimating the horizontal and vertical distances where the line of collimation is inclined to the horizontal and the staff is held normal to the line of collimation (16)
5. A tacheometer is setup at an intermediate point at on a traverse course PQ. The following observations are made on the vertically held staff.
UNIT-II
Part-A (2 Marks)
1. Define Permanent Bench mark:
These are established by different government departments like PWD, Railways, Irrigation etc., The RL of these points are determined with reference to G.T.S Benchmarks. Points on rocks, culvert, gate, pillars etc.
2. Define: Arbitrary Bench Mark:
When the RL of some fixed Points are assumed, they are termed a arbitrary Bench mark
3. State Trigonometrical levelling:
Trigonometrical levelling is the process of determining the differences of elevation of the given station from observed vertical angles and known distance.
4. DefineGeodetic Surveying :
In this surveying, the shape of the earth is taken into account and all the lines lying in the surface are curved lines. It is used for area greater than 250km2. It is accurate. It is conducted by great geometrical survey of India.
5. Define Laplace Station :
At certain station, astronomical observations for azimuth & longitude are also made on the station is called Laplace station
Part-B (16Marks)
1. What are the methods of measurement of the base line and explain any two with neat sketch. (16)
2. From an eccentric Station S, 12.25 metres to the west of the main station B, the following angles were measured BSC = 760251; CSA = 540321 2011. The stations S and C are to the opposite sides of the line AB. Calculate the correct angle ABC if the lengths AB and BC are 5286.5 and 4932.2m respectively. (16)
3. What is meant by a “satellite station”? Explain briefly (16)
4. What are the different corrections to be applied while measuring baseline in geodetic surveying? (16)
5. A steel tape 30m long, standardized at 10 oc with a pull of 100N was used for measuring a baseline. Find the correction per tape length, if the temperature at the time of measurement was 20oc and pull applied was 150 N. Density of steel = 3000 kg/m3. Weight of tape=5.88N. (16)