ayas kamyab ENG 130IN ELEMENTARY SURVEYING TEST #1 1. A tape of standard length 20 m at 85°F was used to measure a base line. The measured distance was 882.50 m. The following being the slopes for the various segments of the line. Segment length (m) 100 150 Slope 2° 20° 4°12' 106" 50 200 300 82.5 7" 48" 3°00' 5°10° Calculate the true length of the line if the mean temperature during measurement was 63°F and the coefficient of thermal expansion of the tape material is 6.5 x 10-6 per °F. 2. The slope distance between two stations A and B measured with EDM is 113.893 m. The heights of the instrument and reflector are 1.740 m and 1.844 m, respectively, above the ground. The measured angle above the horizontal was +4°23'18" Calculate (a) The horizontal length of the line AB (b) The difference in elevation between A and B. 3. If the difference in the levels of the two ends of a 50 m long line is 1 m and its ends are out of alignment by 5 m then the corrections for slope and alignment are? 4. If the back sight reading at point A is greater than the fore sight reading at point B Then (circle correct answer): A is higher than B B is higher than A The height of the instrument is required to know which point is higher. The instrument position is required to know which point is higher. 5. A 300ft tape has been standardized at 80 °F and its true length at this temperature is 300.023 ft. A line is measured at 75 °F and recorded as 3486.940 ft. Find its true length assuming the coefficient of linear expansion is 6.2 x 10 -6 per deg F. Coefficient of linear expansion 6.5 x 10-6 per deg F. Weight steel tape 11 lbf. Young's modulus 29 x 10 6 lbf/in 2.