E B3E032 Pages:2

curved boundary 2.16, 1.53, 1.80, 1.98, 1.80, 1.59, 1.80, 2.52, 2.43, 2.40, 2.58, 2.70,
2.91, and 3.06 meters. Find the area between the chain line, curved boundary and the
end offsets by simpson’s rule and trapezoidal rule. (7.5)
(b) How do you determine the intervisibilty of triangulation stations? (7.5)
5. (a) Explain Mass diagram and its characteristics features. (7.5)
(b) The altitudes of two proposed stations A and B, 80 km apart are respectively 225m
and 550 m. The intervening obstructions situated at C, 40 km from A has an elevation
of 285m. Ascertain if A and B are intervisible. And if necessary find how much B
should be raised so that the line of sight must nowhere be less than 3m
above the surface of the ground. (7.5)
6. (a) Explain how would you measure with a theodolite (i) Horizontal Angle by
repetition and (ii) Vertical Angle (7.5)
(b) What is meant by satellite station and reduction to centre. From an eccentric
station S, 13 metres to the west of the main station B, the following angles were
measured. Angle BSC= 75°25’32”, Angle CSA = 55°32’20’’. The stations 5 and C

are to the opposite sides of the line AB. Calculate the correct angle ABC if the lengths

AB and BC are 5288m and 4940m respectively. (7.5)
PART C
(Answer any Two Full Questions)
7. (a) Explain the terms (i) Celestial sphere 14) Astronomical Triangle 111)
Declination iv) Hour Angle v) Right Ascension (10)

(b) Explain any five laws of weights established from the method of least squares.
(10)
8. (३) Explain the principle behind electro magnetic distance measurement. (5)
(b) Explain the characteristics of EDM instruments. (5)
(c) The following are the mean values observed in the measurement of three angles
A, B, C at one station
A 86942146,2'' with weight 4 A+B =134°36°33.6’’ with weight 3
A+B+C =262°18710.4’’ with weight 1 B+C =185°35’24.8”’ with weight 2
Calculate the most probable value of A, B and C. (10)
9. (a) Explain the principle behind the measurement of horizontal angle, vertical angle
and slope distance using total station. (10)

(b) How will you determine probable error of computed quantities? (10)

Page 2 of 2