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C1154 Pages: 2

volume contained in a length of 120 m, the centre height at 20 m interval being in
metres 2.2, 3.7, 3.8, 4.0, 3.8, 2.8, 2.5 using trapezoidal and prismoidal formulae.
PART C
Answer any two full questions, each carries20 marks.
Explain the principle of least squares. (5)
Explain the principle of EDM measurement. (5)
The following are the mean values observed in the measurement of three angles (10)

A, B, C at one station, Calculate the most probable value.

A = - weight 4

A+B = 134°36732.6” weight 3

B+C = 18535248” weight 2

A+B+C = - 10.47! weight 1.
Define celestial horizon, hour angle, Zenith, Nadir, celestial equator. (10)
Explain the operation of total station. (10)

Explain different types of EDM instruments. Which are the different types of (10)

modulation of electromagnetic waves?

Form the normal equation for x, y, z in the following equation (10)
3x+3y+z-4=0 weight 2
x+2y+2z-6=0 weight 3

5x+y+4z-21=0 weight |

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