Download Two-Peg Test for Level - Engineering Practice - Old Exam Paper and more Exams Engineering Drawing and Graphics in PDF only on Docsity!
Cork Institute of Technology
Bachelor of Engineering (Honours) in Structural Engineering – Stage 1
(NFQ – Level 6)
Summer 2006
Engineering Practice I
(Time: 3 Hours)
Instructions Answer question 1, and any two other questions from Section A. Answer four questions from section B. Use separate answer books for each Section.
Examiners: Mr. L. O’Driscoll Mr B. O’Rourke Mr. T. Corcoran Prof. P. O Donoghue
Section A – Surveying
QA1.(a) A survey has been carried out and recorded in the attached Table A1. The levels were set
out on a 10m x 10m grid (gridline A to the north, gridline 1 to the west). Complete the level booking in Table A1 using the rise and fall method. (7 marks) (b) Draw the contours and grid on graph paper to a suitable scale. (8 marks) (c) It is proposed to build a 20m x 20m level area, with a formation level of 15mOD. The area extends from point B2 to B4 to D4 to D2. The side-slopes of the cut area shall be 1:2 (vertical:horizontal). Show on the plan the outline of the earthworks required to build the platform. (9 marks) (d) Draw a longitudinal section through the excavated site from point A1 to E5. (6 marks)
QA2.(a) Describe how the distance between two points can be measured, if the distance between
them is greater than one tape length, and there is a steep hill between both points preventing “intervisibility” of both points. (5 marks) (b) Explain the term working from the whole to the part, in relation to linear surveys. (5 marks) (c) Describe the procedure for the two-peg test for a level. (5 marks)
QA3.(a) Sketch and describe the basic components of a theodolite. (5 marks)
(b) Describe the procedure of setting up a theodolite over a station, and measuring a vertical angle. (5 marks) (c) A tacheometric survey was completed from a single instrument station location (X), using a theodolite and staff. The resulting survey information is shown in Table A3. From this, calculate the horizontal distances of these points from X. The multiplying constant C , and additive constant K for the theodolite have been given by the manufacturers as 100 and 0 respectively. (5 marks
Staff Station Horizontal angle Vertical Angle Stadia readings Mid-reading A 000 00’ 00” 00 20’00” 2.425 2.
B 300 00’00” -3 0 0’ 00” 1.780 1.
C 65 0 00’ 00” 60 00’ 00” 1.410 1.
D 65 0 00’ 00” 11 0 00’ 00” 1.455 1.
Table A
QA4.(a) An embankment is to be formed on existing ground that is level transverse to the
embankment, but falling at 1 in 30 longitudinally, so that three sections 20m apart have centre line heights of 7.00m, 8.25m and 9.35m respectively above original ground level. If side slopes of 1 in 3 are used, determine the volume of fill between the outer sections when the formation width is 10.00m, using the trapezoidal rule. (7 marks) (b) Explain the following terms: (i) Plane of Collimation (ii) Bench Mark (iii) Automatic level (iv) Height of Collimation method. (8 marks)
Section B – Construction
SECTION B: ANSWER FOUR OF THE FOLLOWING FIVE QUESTIONS
Q.B1 (i) List and describe the functions of a wall. (5 marks)
(ii) Write a brief note on the materials used for masonry cavity wall construction. (5 marks)
Q.B2 Describe two types of suspended ground floors that are suitable for domestic construction. (10 marks)
Q. B3 Outline the sources of dampness in housing. (10 marks)
Q. B4 (i) Give a brief description of the concrete slump test. (5 marks)
(ii) Give a brief description of the concrete cube test. (5 marks)
Q. B5 Write notes on the following roof types: Couple, close couple, collar, double / purlin. You may support your answer with sketches. (10 marks)
