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CE 130 - Sample questions for final exam - Answers

# CE 130 - Sample questions for final exam - Answers - Dept...

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Dept. of Civil Engineering & CEM Name : ______________ California State University, Long Beach Course: CE/CEM 130 – Spring 2008 Instructor: Dr. T.H. Nguyen, P.E. Final Review Questions Circle the most appropriate answer for the following questions: Question 1 . (5 pts) A level circuit was run to set the elevations of several bench marks. The elevation values and cumulative distances obtained are shown in the table below. Point Distance from BM1 (miles) Elevation (ft) BM1 0 909.13 BM2 3 898.84 BM3 7 892.16 BM4 10 901.37 BM1 14 908.57 The adjusted elevation of BM4 = ________ A) 900.97 B) 901.93 C) 901.77 D) None of the above Error = 908.57 – 909.13 = - 0.56 Adjusted Elev. of BM4 = 901.37 + 0.56(10/14) = 901.77 ft Question 2 . (5 pts) If the bearing angle of a course is N 4 o 39’ W, the azimuth angle of the course is ________ Azimuth = 360 o - 4 o 39’ = 355 o 21’ Question 3 . (5 pts) If the azimuth of a course is 150 o 00’, the reverse azimuth of the course is _________ Reverse azimuth = 150 + 180 = 330 o

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Question 4 . (5 pts) Given the following data for a closed property traverse, the balanced latitude of AB is ______ Course Distance (ft) Lat . Dept . AB 164.95 +53.20 + 156.13 BC 88.41 - 75.58 + 45.13 CD 121.69 - 87.09 - 84.99 DE 115.89 + 41.94 - 108.03 EA 68.42 + 67.86 - 8.75 Sum of Lat. = 0.33 Sum of Dept. = - 0.51 Sum of distances = 559.36 Adjusted latitude of AB = +53.20 – 0.33(164.95/559.36) = 53.10
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