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Explain profile levelling with a sketch.
Explain any two methods of contouring? Illustrate with sketches.
PART B
Answer any two full questions, each carries 15 marks
Explain methods to calculate area using
i) latitude and meridian distance and
ii) latitude and double meridian distance.
From an eccentric station S, 12 m to the west of main station B, the following
angles were measured. and C are to the opposite sides of the line AB. Calculate the correct angle ABC if
the lengths of AB and BC are 520 and 480 m respectively.
What are the uses of Mass haul diagram? How do you construct it?
A railway embankment is 16 m wide at formation level, with side slope of 2 to 1.
Assuming the ground to be level transverse to the centre line, calculate the
volume contained in a length of 100 m, the centre heights at 20 m intervals being
in m : 2.0,4.5, 4.0,3.5,2.5, 1.5 m respectively. Use trapezoidal rule.
Explain different triangulation figures with sketches.
Distance between two proposed stations A and B in a triangulation is 110 km.
Elevation of station A is 300 m while that of B is 600 m. There is point C
between A and B at a distance 50 km from A and is having an elevation of 238
m. Ascertain whether A and B are intervisible. If not, find the minimum height of
tower required at B so that B is visible from A with a minimum clearance of 2.5
m above the surface of the ground.
PART ©
Answer any two full questions, each carries 20 marks.
State any five laws of weights of observation with examples.

The angles of a triangle A,B,C are:

&-77 14110" weight 4
B=49°40'35" weight 3
C=53°04'52" weight 2

Find the most probable value of the method angles A, B and C using normal

equation.

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