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6. Reciprocal leveling was done to determine the difference in elevation between two stations C and D. the following observations were made. Find the difference in elevation and the error due to line of collimation. Neglect other errors.( :( June-july2015) POSITIONOF DUMPY LEVEL STAFF READING ON C D Near C 3.250 2.730 Near D 2.505 1.950 Unit 61. Explain the following :i) Types of adjustments of dumpy level. ii) Differential leveling and profile leveling. (Dec2013, June-july2014) 2. What is meant by sensitiveness of bubble tube? Describe how you would determine in the field the sensitiveness of a level tube attached to a dumpy level. (Dec14, june-july13) 3. Define the following terms:( June-july2015) i)Benchmark ii) Back sight iii) Foresight iv) Reduced level 4 Solve by entering into a level book. Back sight Inter sight Fore sight 0.675 0.750 1.230 2.565 1.935 2.225 1.835 3.115 3.220 2.875 Unit 71. Describe Interpolation of Contours (Dec14, june-july13) 2. How do you trace a contour gradient of 1 in 50 on a map having contour interval 2.0 m. (Dec13, june-july14) 3. a. Explain rise and fall method of entering the levelling data, with an example. b. What is fly back levelling? Why is it performed? (june-july14) 4. Following consecutive readings were taken with a dumpy level on a continuously sloping ground. 1.550, 1.955, 2.310, 2.655, 3.170, 0.530, 1.850, 2.755, 0.300, 1.730 and 2.150. Enter the readings in a level field book and calculate the RL of points using rise and fall method. RL of
Department of Civil Engineering, SJB Institute of TechnologyPage 5 5. The following set of readings was obtained in a leveling job: 2.500, 1.000, 1.500, 1.800, 2.300, 2.900, 1.300, 3.200, 2.800, 2.000, 1.500. Instrument was shifted after 4thand 7threadings. The first readings was taken on a bench mark of RL = +250.000. Find the RL of points using HI method. Apply usual arithmetic checks.(June-july-13) UNIT 81. List the methods of plane tabling. Explain the radiation method. (Dec-13,June-July15.,Dec14) 2. What is orientation? Explain the orientation of plane table by back sighting. (Dec-14,June-3. What are three point problems in plane table survey? Explain Bessel’s graphical solution forthe same. (Dec-13, June-July14.,) 4. What is resection? State 3