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Egs 2102 Surveying I Question Paper
Egs 2102 Surveying I
Course:Bachelor Of Science In Geospatial Information Science
Institution: Dedan Kimathi University Of Technology question papers
Exam Year:2013
1
DEDAN KIMATHI UNIVERSITY OF TECHNOLOGY
UNIVERSITY EXAMINATIONS 2013/2014
FIRST YEAR SPECIAL/SUPPLEMENTARY 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
JULY 2013 TIME: 2 HRS
INSTRUCTIONS: Answer QUESTION ONE and any OTHER TW0 questions.
1 Question one (1), 30 marks
a. What is the relationship between traditional surveying and Geomatics (1 mk)
b. Surveying may be classified generally into two. Identify and explain them (4 marks )
c. Define plane table surveying (1 mk)
d. What are the properties of contour lines? (3 mks)
e. Name the types of precise levels used in precise leveling. (3 mks)
f. Temporary and permanent adjustment (2 mks)
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 mks)
i. List the major sources of error in leveling (3 mks)
j. Differentiate between the line of sight and the line of collimation. (2 mks)
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)
2
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
l. Differentiate between systematic errors and blunders (2 mks)
m. List the major sources of error in leveling (3 mks)
n. Differentiate between the line of sight and the line of collimation. (2 mks)
2
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 150.82. 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 mks)
ii. If a boning rod of length 3 m is to be used, find the level readings a and b (2 mks)
iii. Find the height of the sight rails above the pegs at X and Y (2 mks)
c. Discuss the four main uses of leveling (8 marks)
3
a. Define leveling (1 mark)
3
b. Sources of error in leveling may be classified into 3 main sources. Discuss them,
giving an example of each (6 marks)
c. Explain the difference in the following terms (6 marks):
i. Simple and differential leveling
ii. Datum and bench mark
iii. Temporary and permanent adjustment
d. Discuss the concept of reciprocal leveling. Why is it useful (7 marks)
4
a. Define altimetry. Why is it necessary (2 marks)
b. Discuss the five methods applied in altimetric heighting (15 marks)
c. Identify the three main factors influencing pressure differences between given points (3
marks)
5
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
B C D
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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