(a) A 30 m chain was tested before a survey and found to have a lengt…

Question

(a) A 30 m chain was tested before a survey and found to have a length of 29.93 m. If the length of a line measured with this chain was 273.35 m, find the true length of the line. (5)

(b) To continue a survey line past on obstacle in the form of pond, stations A and B on the main line were taken on opposite sides of the pond. A line AC, 315 m long was laid down on the left of AB, and a second line AD, 270 m long was laid down on the right of AB, the points C, B and D being in the same straight line. CB and BD were then measured and found to be 156 m and 174 m respectively. Find the length of AB. (8)

(c) Write the classification of surveying and explain basic principles of surveying. (7)

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