For Questi tation BS evation 00.00 BM No.1 8.63 10+00 104 8.5 63 4.1 3.1 2.9 40

Question

For Questi tation BS evation 00.00 BM No.1 8.63 10+00 104 8.5 63 4.1 3.1 2.9 40 20 10 15 20 40 10+50 10.5 11.2 8.5 2.l 5.53.6 40 20 10 10 25 11+00 9 114 126102 112 124 50 25 15 15 25 50 4.5 04.00 BM No.2 50. From what elevation are the foresights calculated? a. 708.59' b. 708.61' c. 708.65" d. 708.63' e. 708.64' 51. What is the error of closure? a. -0.02' b. -0.04 c. +0.04' d.-0.01' e. +0.02' 52. Where is the elevation of the lowest point in the notes? a. 11+00, 15' right b. 10+50, 20' left c. 10+00, 40' right d. 11+00 e. 11+00, 50' right

Explanation / Answer

50. d) 708.63' , HI = BM Ele + BS = 700 + 8.63' = 708.63'

51. c) Elevation of BM2(measured) = 708.63 - 4.59 = 704.04', (but actual is 704.00')

So Error = 704.04 - 700.00' = +0.04'

52. e) Station with largest FS value will be having lowest elevation, so at Stat 11+00 ,50' Right, Elevation = 708.63 - 13.1 = 695.53

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