Technical Drawing - Exam Papers - Higher - 1994 - Building
(a) On a contour map A and B are two points whose altitudes are 110 m and 90 m, respectively.
A skew bore-hole at B is drilled in a southerly direction in plan and has an actual inclination of 45° to the horizontal plane. It reveals the top and bottom surfaces of the stratum at distances of 15 m and 90 m, respectively from B.
Determine the dip, strike and thickness of the stratum.
(b) Draw the projections of another skew bore-hole drilled at an angle of 70° to the horizontal Plane from A and which reaches the bottom surface-of the stratum at a distance of 100 m from A.
Scale 1 : 1000