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Egs 2102 Surveying I Question Paper
Egs 2102 Surveying I
Course:Bachelor Of Geospatial Information Science
Institution: Dedan Kimathi University Of Technology question papers
Exam Year:2013
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DEDAN KIMATHI UNIVERSITY OF TECHNOLOGY UNIVERSITY EXAMINATIONS 2013/2014 FIRST YEAR SECOND SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN GEOMATIC ENGINEERING AND GEOSPATIAL INFORMATION SYSTEMS AND BACHELOR OF SCIENCE IN GEOSPATIAL INFORMATION SCIENCE EGS 2102 SURVEYING I DATE: 15TH APRIL 2014 TIME: 11.00AM – 1.00PM INSTRUCTIONS: Answer QUESTION ONE and any OTHER TW0 questions. QUESTION ONE (1), 30 MARKS
a. What is the relationship between traditional surveying and Geomatics (1 mark)
b. Identify and briefly describe the various classification of surveying. (4 marks )
c. Define plane table surveying (1 mark)
d. What are the properties of contour lines? (3 marks)
e. Name the types of precise levels used in precise leveling. (3 marks)
f. Differentiate between the types of adjustments carried out in leveling equipment (2 marks)
g. What is meant by the principle “working from whole to part” in surveying? Why is it necessary? (2 marks)
h. Differentiate between systematic errors and blunders (2 marks)
i. What are the major parts of a level (3 marks)
j. Differentiate between the line of sight and the line of collimation. (2 marks)
k. The table below shows a sample of a booking sheet undertaken during the surveying of a road to be constructed. The leveling started at bench mark A and ends at the bench mark I. use the rise and fall method to complete the level book and apply the necessary checks.
(7 marks)
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STN
DIST
BS
IS
FS
RISE
FALL
REDUCED LEVELS
REMARKS
A
0
0.44
BENCHMARK
B
100
1.64
C
200
2.94
D
300
0.17
3.98
E
400
2.12
F
500
0.32
4.11
G
600
0.54
3.88
H
700
0.11
4.08
I
800
3.96
1673.09
BENCHMARK
QUESTION 2 (20 MARKS) a. A sewer is to be laid at a uniform gradient of 1 in 200, between two points X and Y, 240 m apart. The reduced level of the invert at the outfall X is 150.82m in order to fix sight rails at X and Y, readings are taken with a level in the following order: Reading Staff Station BS 0.81 TBM (near X), RL 153.81 IS `a´ Top of sight rail at X IS 1.07 Peg at X FS 0.55 CP between X and Y BS 2.15 CP between X and Y IS `b´ Top of sight rail at Y FS 1.88 Peg at Y
i. Draw up a level book and find the reduced levels of the pegs (8 marks)
ii. If a boning rod of length 3 m is to be used, find the level readings a and b (2 marks)
iii. Find the height of the sight rails above the pegs at X and Y (2 marks)
b. Discuss the main uses of leveling (8 marks) QUESTION 3 (20 MARKS)
a. Define altimetry. Why is it necessary (2 marks)
b. Discuss the methods applied in altimetric heighting (15 marks)
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c. Identify the main factors influencing pressure differences between given points (3 marks)
QUESTION 4 (20 MARKS)
a. Discuss the methods that may be used in the booking and reducing of levels (6 marks)
b. The differential leveling below was carried out to establish the reduced levels of the
points A-G. The staff was held on the points as shown in the figure and the level placed in
the two positions indicated. Using any of the booking methods, establish the reduced
levels of the points. All units are given in meters (12 marks)
c. Carry out an arithmetic check on the results (2 marks)
F G
E
D
B C
BM A
321.70
1.20 1.80 4.66 3.98 5.11
4.30 2.01
4.42
4.72
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