F21 Homework_02_Crew05

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California Polytechnic State University, San Luis Obispo *

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237

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Mechanical Engineering

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Jan 9, 2024

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pdf

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HOMEWORK 2 CREW 5 See Section 2.13 (Pg. 51) and Section 4.9 (pg 97) in the textbook for help. 1. You are set up on Point “A” (Elevation = 123.00 ft.) and sighting Point “B”. Determine the Elevation of Point “B” based on the following information; (2 Points Each) a. hi = 5.25 ft. VD = 50.12 ft. HR = 4.15 ft. b. hi = 5.25 ft. VD = -50.12 ft. HR = 4.85 ft. c. hi = 5.25 ft. Slope Distance = 362.76 ft. Zenith Angle = 87°22'30" HR = 4.85 ft. d. hi = 5.25 ft. Slope Distance = 362.76 ft. Zenith Angle = 92°32'30" HR = 4.85 ft. 2. You are set up on Point “A” and sighting Point “B” (Elevation = 327.00 ft.). Determine the Elevation of Point “A” based on the following information; (2 Points Each) a. hi = 5.25 ft. VD = 50.12 ft. HR = 4.15 ft. b. hi = 5.25 ft. VD = -50.12 ft. HR = 4.85 ft. c. hi = 5.25 ft. Slope Distance = 339.45 ft. Zenith Angle = 87°22'30" HR = 4.15 ft. d. hi = 5.25 ft. Slope Distance = 362.76 ft. Zenith Angle = 92°32'30" HR = 4.85 ft. 3. Calculate the average angle for the angles below: a. direct inverted average B 0 ° 00’00” 179 ° 59’ 45” A D 61 ° 19’ 25” 241 ° 19’ 30” Difference b. Direct inverted average B 0 ° 00’00” 179 ° 59’ 30” A D 106 ° 29’ 35” 286 ° 29’ 10” Difference 4. What are the three components of a total station? 5. You measured a direct zenith angle of 85 ° 46’ 30” and an inverted zenith angle of 274 ° 13’ 10”. What is the average zenith angle? 6. This week we discussed mapping using the total station. However, some surveyors sometimes opt for Real Time Kinematics (RTK) with GPS or Global Navigational Satellite Systems (GNSS) equipment, because it is faster and easier. H owever, there have been a numerous debates concerning the most appropriate equipment to use, and Total Stations remain widely used compared to other surveying equipment including GPS. Why do you think is the case?
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