C 14-dce-106-surveying-1

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C14 –CE–106
4020
BOARD DIPLOMA EXAMINATION, (C–14)
OCT/NOV—2016
DCE—FIRST YEAR EXAMINATION
SURVEYING—I
Time : 3 hours ] [ Total Marks : 80
PART—A 4×10=40
Instructions : (1) Answer all questions.
(2) Each question carries four marks.
(3) Answers should be brief and straight to the point and
shall not exceed five simple sentences.
1. (a) What are the instruments used for angular measurements? 2
(b) What are the duties of surveyor? 2
2. (a) Define surveying. 2
(b) Classify different surveys based on instrument. 2
3. (a) State and explain the principle of chain surveying. 2
(b) List different instruments used in chain surveying. 2
4. (a) Explain any one function of each of the following : 2
(i) Arrow
(ii) Plumb bob
(b) Explain the term ‘baseline’. 2
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5. (a) The distance between two points, measured with a 20 m
chain, was recorded as 547 m. It was afterwards found that
the chain was 6 cm too long. What was the true distance
between the points? 2
(b) Define ranging. 2
6. (a) Name different indirect methods used for measuring
sloping ground. 2
(b) State the types of cross-staff. 2
7. (a) State the types of compass. 1
(b) Convert the following quadrantal bearings into whole circle
bearings : 3
(i) N E55 55° ¢
(ii) N W55 55° ¢
(iii) S W55 55° ¢
8. (a) Calculate the back bearings for the following fore bearings
of lines : 3
(i) 155 55° ¢
(ii) N E55 55° ¢
(iii) 250 55° ¢
(b) Define local attraction. 1
9. (a) State any four parts of prismatic compass. 2
(b) Calculate the true bearing of a line, whose magnetic
bearing is 89 55° ¢ with declination 1 05° ¢E. 2
10. (a) What are the needs of minor instruments in surveying? 2
(b) State the uses of pantograph. 2
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PART—B 10×4=40
Instructions : (1) Answer any four questions.
(2) Each question carries ten marks.
11. (a) Explain briefly geodetic surveying. 3
(b) Explain the classification based on the nature of field of
survey. 7
12. (a) State under which circumstances you prefer chain
surveying. 4
(b) Describe different types of chains which are commonly
used. 6
13. (a) A 20 m chain was found to be 0·05 m too long after
chaining 1400 m. Further it was found to be 0·1 m too long
after chaining 2200 m. If the chain was corrected before
commencement of work, find the true distance. 6
(b) What do you understand by (i) well-conditioned triangle
and (ii) ill-conditioned triangle? 4
14. (a) A survey line ABCD is crossing a pond. Stations B and C
are on the opposite sides of the pond. Two lines BM 270 m
and BN 330 m are the setouts on either side of the pond
and clearing it. Also MC and CN are found to be 150 m and
165 m respectively. Calculate the missing length BC on the
main line. 4
(b) The following perpendicular offsets were taken at 25 m
intervals from a survey line to an irregular boundary line :
9·8, 12·9, 17·6, 15·9, 19·8, 21·9, 24·5, 22·2, 18·9 m
Calculate the area in sq.m enclosed among the survey line,
irregular boundary line and the first and last offsets by the
(i) Trapezoidal rule
(ii) Simpson’s rule 6
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15. (a) Differentiate between prismatic compass and surveyor’s
compass. 6
(b) Explain secular variation and diurnal variation. 4
16. (a) The following observations were made by a prismatic
compass during traversing : 5
Line FB BB
AB 338 28° ¢ 158 28° ¢
BC 82 20° ¢ 262 20° ¢
CD 167 08° ¢ 347 08° ¢
DA 259 50° ¢ 79 50° ¢
Find the included angles of the traverse.
(b) The bearing of one side of plot in the shape of a regular
pentagon is 70°. Find the bearings of the other sides of the
plot, when traversed in a clockwise direction. 5
17. (a) The bearings observed in a traverse survey at a place,
where local attraction was suspected are given below :
Line Fore
bearing
Back
bearing
PQ 124 30° ¢ 304 30° ¢
QR 68 15° ¢ 246 00° ¢
RS 310 30° ¢ 135 15° ¢
SP 200 15° ¢ 17 45° ¢
At what stations do you suspect local attraction? Find the
corrected bearings of the lines. 7
(b) Define (i) closed traverse and (ii) open traverse. 3
18. (a) Draw neat sketch of Abney level. 5
(b) Explain how the pantograph is used for enlargement and
reduction. 5
H H H
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