9. A level is setup midway between two wood stakes that are about 300 feet apart. The rod reading on stake A is 8.72 feet and it is 5.61 feet on stake B. The level is moved to point B and set up so that the eyepiece end of the telescope is touching the rod as it is held plumb on the stake. A reading of 5.42 feet is determined on the rod at stake B by sighting backwards through the telescope. The level is then sighted on the rod held on stake A, where a reading of 8.57 feet is noted. a) What is the correct difference in elevation between stakes A and B? b) If the level had been in perfect adjustment, what reading would have been observed at stake A, from the second setup? c) What is the line of sight error in 300 feet? d) Describe how you would eliminate the line of sight error from the scope:

9. A level is setup midway between two wood stakes that are about 300 feet apart. The rod reading on stake A is 8.72 feet and it is 5.61 feet on stake B. The level is moved to point B and set up so that the eyepiece end of the telescope is touching the rod as it is held plumb on the stake. A reading of 5.42 feet is determined on the rod at stake B by sighting backwards through the telescope. The level is then sighted on the rod held on stake A, where a reading of 8.57 feet is noted. a) What is the correct difference in elevation between stakes A and B? b) If the level had been in perfect adjustment, what reading would have been observed at stake A, from the second setup? c) What is the line of sight error in 300 feet? d) Describe how you would eliminate the line of sight error from the scope:

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

(Alternate Peg Method) In the two-peg test of a dumpy level, the following observations are taken: Rod reading On point A On point B Instrument set-up near M (m) Instrument set-up near P (m) 0.296 1.563 0.910 2.140 Requirements: a. Determine the true difference in elevation between A and B. b. Determine the error in the line of sight for the net distance AB c. If the line of sight is not in adjustment, determine the correct rod reading on A with the instrument still set up near B.
Which of the following may cause errors in leveling measurement? (Multiple choice) (Multiple choice) 1 □ A. The level tripod sinks O B. Reading Error □ C. The instrument is not erected at approximately the same distance from front to back □D. Improper implementation of the centering of the level □ E. Subsidence occurred at the level where the level was erected □ F. Vertical dial error of the level
A straight tunnel is to run between two points A and B whose coordinates are as under. Point Northing 0.0 Easting 0.0 A B 3000 m 250 m A shaft is to be sunk at a point D which is at the middle of AB. As it is impossible to measure along AB directly, the point D is to be fixed from another point C whose coordinates are 1760 Im northing and 1395 m easting. Calculate (a) the coordinates of D, (b) the length and bearing of CD, and TH (c) the angle ACD, if the bearing of AC is 38°30' east of north.
A rotating laser is being used to control the casting of a concrete floor slab. The instrument is set up over a TBM that has a reduced level of 1299.234 mAOD and the projected plane is 1.534 m above this height. The base of the floor slab has a reduced level of 1296.734 mAOD and the slab must be 300 mm thick. What height on a levelling staff must the laser detector be mounted in order to ensure the slab is cast to the correct thickness (please state the value in metres and quote the value to three decimal places)?
In the two-peg of a dummy level, the following observation are taken. Rod Reading on A Rod Reading on B INSTRUMENT SET UP NEAR A 3.463 0.821 INSTRUMENT SET UP NEAR B 4.125 1.307 What is the difference in elevation between A and B? If the line of sight is not in adjustment, determine the correct rod reading on A with the instrument still set up at B. If the line of sight is not in adjustment, determine the correct rod reading on B with the instrument still set up at A.
1 attachment - 4. A stone was dropped from a hot air balloon when the balloon was 93 m from the ground (ascending at a rate of 2.5 m/s). Determine: a. The velocity of the stone after 3.5 sec b. The time required for the stone to attain a downward velocity of 22 m/s c. The altitude of the stone from the ground after 4 sec
Complete a set of differential leveling field notes for the simulated survey below. Perform a mathematical error check and an allowable error check of your completed field notes. Show all work BM-1 TP-1 BM 1 TP-2 BM-2 TP-3 9.60 BM-1 1.14 Sta. Set-up #1 Set-up #5 B.S. 4.41 TP-1 8.96 12.25 7.96 TP-3 HI ^ Set-up #2 F.S. 12.98 1.61 TP-2 ㅈ Set-up #4 Elev. Set-up #3 100.00 7.95 1.99 BM 2 Distance 250° 275' 325' 405* 225' Closing elevation = Error of closure A EBS - EFS Math error: YES or Allowable error = Survey: OK or REDO NO Note: Total survey distance (ft.) it the sum of the values in the "Distance" column.
17. A stone is dropped from a cliff and 2 sec later another stone is thrown down with a speed of 22 m/s. How far below the top of the cliff will the second stone overtake the first? B. 994 m C. 795 m A. 375 m D. 507 m
a) 0.700 The following readings were taken in sequence during a leveling job: Readings (m) 1.250 1.285 1.125 0.810 1.555 -1.400 1.235 0.665 1.905 Remarks BMI R.L. = 101.335 Peg A Peg B 2 Change Point CP2 Change Point CP2 BM2 R.L=103.879 -1.400 Change Point CP1 Change Point CP1 CGS 1905 Inverted staff reading taken to the underside of a bridge Peg C Prepare a standard form of booking for these readings and reduce them using the rise fall method applying all the necessary arithmetic checks and adjust the final Reduced Levels.
The following level notes for the determination of BM#2 do not check. The elevation of BM#1 and the rod readings are correct. Determine the corrected elevation of BM#2. STA B.S. H.I. F.S. ELEV. BM 1 6.72 127.36 120.64 TP 1 12.43 138.55 1.24 126.12 ТР 2 2.65 140.09 1.11 137.44 TP 3 0.54 132.59 8.04 132.05 ТР 4 4.27 124.55 12.31 120.28 BM 2 3.02 121.33
Draw a sketch of level rods (as seen from the eyepiece of an engineer's transit) with the following measurements. i. ii. iii. 2.265 m 1.442 m 2.418 m iv. 3.415 m Example:
SITUATION 4. From the given data of differential leveling as shown in the tabulation: STA. F.S. 1 2 3 4 5 6 7 B.S. 5.87 7.03 3.48 7.25 10.19 9.29 6.29 6.25 7.08 5.57 4.45 4.49 ELEV. 392.25