# Technical Drawing - Exam Papers - Higher - 2004 - Building

### Question 5

On a contour map A and B are two points whose altitudes are 115 m and 105 m respectively. On the map B is located 80 m north-east of A. A skew bore-hole at A is drilled in a north-westerly direction in plan and has an actual inclination of 50° to the horizontal plane. It reveals the top and bottom surfaces of a stratum at distances of 45 m and 95 m, respectively, from A.

A skew bore-hole at B is drilled in a south-easterly direction in plan and has an actual inclination of 60° to the horizontal plane. It reveals the top and bottom surfaces of the stratum at distances of 35 m and 100 m, respectively, from B.

(a) Determine the dip, strike and thickness of the stratum.

(b) Another skew bore-hole at B is drilled in a westerly direction in plan and has a true inclination of 45° to the stratum.
Determine the altitudes at which the bore-hole reaches the top and bottom surfacea of the stratum.

Scale 1: 1000

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