Surveying I

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15 Νοε 2013 (πριν από 3 χρόνια και 4 μήνες)

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1

POKHARA UNI VERSI TY


Level: Bachelor

Semester


Fall

Year : 20
10

Programme:
BE

Full Marks: 100


Pass Marks : 45

Course:
Surveying I

Time : 3hrs.


Candidates are required to give their answers in their own words as far
as practicable.

T
he figures in the margin indicate full marks.

Attempt all the questions.


1.


a)

What are the primary divisions of surveying? Explain the principles
of survey.

b)

Discuss the methods
of
linear measurements.

7


8

2.


a)

What are the methods of taking horizontal
r
eading
s by using
theodolite? Describe about repetition method.

b)

Find the amount of local attraction at different stations, the corrected
bearings of the lines and the included angles with check, If the
following bearings were observed during survey.



Line

Fore bearing

Back bearing

AB

140º 45



318° 15 ’

BC

216º 30



38° 0’

CD

209º 15



30° 15 ’

DE

319° 45


139º 45 ’

EA

60° 15



240° 15 ’


5



10













3.


a)

Write the methods of plane table survey. Discuss on resection
method to determine the plane t
able occupied station by using two
point problem.

b)

Mention advantages and disadvantages of plane table survey.

8



7

4.


a)

What is trigonometrical levelling? Derive the formula to determine
the distance between the instrument station and the inaccessible
elevat
ed objects as well as the RL of that object when the object is
not in the same vertical plane.

8






2

b)

A steel tape exactly 30m long at 20º
C

when supported through out
its length under the pull of 10 kg. A line was measured under the
pull of 15kg and at a mean te
mperature of 32º
C

and found to be
987m long, cross sectional area of tape = 0.03cm
2

, total weight of
tape = 0.693kg, coefficient of steel is 11x 10
-
6

/ °
C

and
Y
oun
g
's
modulus of elasticity = 2.1 x 106 kg/ cm
2

. Compute the true length
of line if the tap
e was supported at every 15m during the
measurement.

7

5.


a)

Explain the methods of balancing the closing error in the theodolite
traversing.

b)

The following staff readings were observed successively with level.
The instrument have been moved forward after

the second, fourth
and e
ighth readings.


0.875, 1.235, 2.310, 1.385, 2.930, 3.125,4.150,0.120,2.030,2.765.


The first reading was taken at staff held over the bench mark of
RL=500.456m.
E
nter t
he readings in the level book f
o
r
m and find the
el
evations of the points by using

i.

Rise and fall method

ii.

Collimation method (Height of instrument method)

6



9

6.


a)

Write the difference between prismatic compass and surveyor's
compass.

b)

What is the principle of levelling? Why two peg test is carried out in
leve
lling? Explain the procedure.

7



8

7.


Write short notes
on
:

a)

Triangulation systems

b)

Analytical intersection

2

×

5