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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Autumn Examinations 2011
Module Title: Traverse & Control Surveying
Module Code: CIVL
School: Building & Civil Engineering
Programme Title: Higher Certificate in Civil Engineering
Programme Code: CCIVE_6_Y
External Examiner(s): Ms. Maria Kyne Mr John T Murphy
Internal Examiner(s): Mr. James O’Byrne Mr. James Hickey
Instructions: Answer any 4 questions. All questions carry equal marks.
Duration: 2 hours
Sitting: Autumn 2011
Requirements for this examination:
Answer any 4 questions, if attempting question 1 please detach the answer sheet provided, write your name and exam number on it and return in you answer booklet. Complete all sketches on graph paper.
Q1. The following data is the field data from a closed traverse survey: Co-ordinates of A = 420.000E, 550.000N WCB of line AB = 269o11’54” Line Length Station Included Angle AB 50.732 A 259 o40’05” BC 43.605 B 247 o39’02” CD 53.126 C 234 o17’18” DE 53.897 D 247 o42’41” EA 77.833 E 270 o40’02” (i) Draw a suitable sketch of the data at a scale of 1:1000 (5 Marks)
(ii) Draw a suitable table, tabulate the data and adjust the traverse by Bowditch’s method. (14 Marks) (iii) Calculate the traverse accuracy and comment on it. (6 marks)
Q2. (a) Explain briefly, the relationships between the axes that determine if a theodolite is in
perfect adjustment. (8 marks)
(b) In the checking of the working adjustment of surveying instruments, what is a 2 peg test? (2 marks) (c) Describe how the permanent adjustments of a theodolite may be checked in the field. Include sketches in your answer. (15 marks)
Q3. A developer has acquired a plot of land whose boundaries are described by the coordinates of the closed
traverse below.
Station Easting Northing Station Easting Northing A 70.00 220.00 D 300.00 160. B 90.00 70.00 E 230.00 250. C 250.00 80.
(a) To a suitable common engineering scale draw a plot of the area. (6 marks)
(b) Calculate using the coordinates the area (14 marks)
(c) Comment on the use of a closed traverse over that of an open traverse in this instance. (5 marks)
