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ASSIGNMENT QUESTIONS - 14071_551
ASSIGNMENT QUESTIONS - 14071_553

Engineering Aid 2 - Intermediate Structural engineering guide book
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7-9. The stadia method provides horizontal distances of a higher precision than those obtained by taping,  EDM,  or  differential leveling. 1. True 2. False Learning  Objective:  Identify characteristics of instruments used for  determining  horizontal distances  and  elevations.  Identify procedures for determining the vertical angle of a point by the transit-stadia  method.  Use  basic terms and formulas and also perform computations that are used on topographic  surveys. 7-10. Philadelphia rods should be used for stadia work for distances up to 1,500 feet. 1. True 2. False 7-11. The stadia interval is defined as POINT   ROD   INTERCEPT VERTICAL  ANGLE 1. the reading on the rod between the   stadia   hairs 2. the distance to the stadia rod 3. the  reading  between  the  upper stadia hair and the middle cross  hair 4. the reading between the lower stadia hair and the middle cross  hair 7-12. When your stadia reading is more than the length of the rod, what procedure do you use? 1. Read a half-interval using the middle cross hair and then multiply the reading by 2 2. Hold  two  rods  together 3. Make a rod in the BU shop that will be long enough 4. Shorten  your  sighting 7-13. Stadia distance is equal to 1. the  rod  reading 2. the rod reading divided by the stadia constant 3. the  stadia  interval 4. the  stadia  interval  times  the stadia constant 7-14. Stadia horizontal distances are normally recorded to what degree of accuracy? 1. To 0.01 ft with a target 2. To 0.1 ft over 300 ft 3. To the nearest foot 4. As close as possible IN  ANSWERING  QUESTIONS  7-15  THROUGH  7-19, ASSUME THAT YOU ARE LOCATING POINTS B AND C BY  THE  TRANSIT-STADIA  METHOD  WITH  THE INSTRUMENT SET UP AT STATION  A. USE THE FOLLOWING  INFORMATION: Focal distance = 1.00 ft Elevation  A =  431.8  ft Instrument   height   = 4.5   ft Rod reading = 4.5   ft B 4.54 +3°18’ C 6.42 -2°44’ 7-15. What is the horizontal distance AB? 1. 451.6 ft 2. 452.6 ft 3. 452.8 ft 4. 453.5 ft 7-16. The difference in elevation between station  A and point  B is 1. 26.1  ft 2. 26.2 ft 3. 26.4  ft 4. 26.6 ft 7-17. What is the elevation of point B? 1. 405.6  ft 2. 405.7 ft 3. 457.9  ft 4. 458.0  ft 46







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