Find back bearing abs 3030 e bcn 4030 w the magnetic bearing of a line ab is 530 what will be the true. Such a disturbing influence is called as local attraction. Solving competitive location problems with social media data based on customers local sensitivities wei jiang 1,2, yandong wang 3,4,5, mingxuan dou 3,4, senbao liu 6, shiwei shao 7 and hui liu 7 1 school of geography and tourism, anhui normal university, wuhu 241003, china. We know that even if the local attraction is present at every station the measured included angles will not be incorrect and we can calculate them correctly. Errors classification of survey chain survey compass survey theodolite survey tachometric survey plane table survey triangulation survey photogrammetry local attraction when a. Surveying sixth edition is designed to cover the standard topics in a basic surveying course in a streamlined manner, meeting the learning needs of todays student. Download link is provided and students can download the anna university ce6304 surveying i syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. Civil engineering surveying section 2 page 1 questions and.
Compass surveying is not recommended for areas where local attraction is suspected due to the presence of magnetic substances like steel structures, iron ore deposits, electric cables conveying currents, and so on. Dip inclination of the needle with the horizontal is called dip of the needle. While introductory, its depth and breadth also make it ideal for selfstudy and preparation for licensing examinations. Line fb bb pq 1240 30 3040 30, qr 680 15 2460 0 rs 3100 30 50 15 sp 2000 15 170 45 at what station do you suspect local attraction. Magnetic north may deviate from true north due to local attraction or magnetic declination. This type of survey can be used to measure large areas with reasonable speed and accuracy. An introduction to geomatics presents basic concepts and practical material in each of the areas fundamental to modern surveying geomatics practice.
Civil engineering for all download civil engineering. Concept of bearing quadrantal bearing and whole circle bearing. Explain the merits and demerits of plane tabling over theodolite surveying. This is the civil engineering questions and answers section on surveying with explanation for various interview, competitive examination and entrance test. If we find such line then that means the two end stations of that line are free from any local attraction. Opposite amul dairy, civil court road, post box no. Easiest method to find local attraction and find correct. Surveying traverse surveying traverse distance traverse methods of computing area a simple method that is useful for rough area estimates is a graphical method in this method, the traverse is plotted to scale on graph paper, and the number of squares inside the traverse are counted a d c b distance traverse methods of computing area a c. Methods for correcting the bearings affected by local. Pdf ce6304 surveying i books, lecture notes, 2marks with. Each topic introduced is thoroughly described, the theory is rigorously developed, and a large number of numerical. Convert the following wcbs to qbs a wcb of ab 4530 ans 4530 b wcb of bc 12545 ans 180 12545 54 15 fore bearing of the following lines are given. Introduction to compass surveying and their components, types of compass, errors in compass, corrections for local attraction, principles and procedures.
While compass surveying, the magnetic needle is sometimes disturbed from its normal position under the influence of external attractive forces. The branch of surveying in which direction of survey line are determine by a compass and their length by a chain or tape is called compass surveying. Course overview last minute revision of surveying in hindi 3. To study the optimization techniques for various problems to study the transportation and assignment problems. Syllabus for mine surveying part test 1 linear measurement. What do you mean by orientation in plane table surveying. This textbook provides an uptodate knowledge of the basic principles of surveying and levelling.
He has been involved as an instructor in surveyinggeomatics education for more than 35 years and has presented workshops on statistics, least squares adjustments, state plane. Surveying is defined as taking a general view of, by observation and measurement determining the boundaries, size, position, quantity, condition, value etc. This volume is one of the two which offer a comprehensive course in those parts of theory and practice of plane and geodetic surveying that are most commonly used by civil engineers. Problems on bearing page 1 question bank problems on bearings problems on bearings types of problems. Local attraction in compass surveying may exist due to a incorrect levelling of the magnetic needle b loss of magnetism of the needle c friction of the needle at the pivot d presence of magnetic substances near the instrument ans. Remote sensing questions 24 appendix i question bank and solved problems appendix ii multiple choice questions appendix iii abbreviated terms index charotar publishing house pvt. The term is also used to denote amount of deviation of. Local attraction compass surveying hello, local attraction. When the magnetic needle is suspended freely and balanced properly, unaffected by magnetic substances, it indicates a direction. With the help of the readings from the stations which are free from local attraction and the correct included angles we. Compass surveying is recommended when the area is large, undulating and crowded with many details. Adjustments of levels, tacheometric surveying, circular curves, transition curves, vertical curves, field astronomy, theory of errors, setting out works, hydrographic surveying, photographic surveying, modern techniques of surveying. Aline or plane passing through geographical north pole and geographical south pole magnetic meridian.
What is different between magnetic bearing and true. Instruments for measuring distance and ranging, units of measurement in surveying. A total station ts or total station theodolite tst is an electronicoptical instrument used for surveying and building construction. The first volume covers in 24 chapters, the most common surveying operations. The external forces are produced by sources of local attraction which may be current carrying wire magnetic materials or metal objects. Compass surveying principles use of prismatic compass, measurement of bearings, conversion of bearings, local attraction, correction of compass traverse. An introduction to geomatics, th edition charles d. A highly readable bestseller, elementary surveying. If local attraction exists at any traverse station, both the forward and back bearings are affected equally. Civil engineeringsurveying and leveling 362 important mcq pdf. This is because that these magnetic compass is influenced by other magnetic objects at that locality such as wires carrying electric current, rails, steel and iron structures, steel tapes etc. Local attraction correction by interior angles method. Solved examples with detailed answer description, explanation are given and it would be easy to understand. Do not operate any instrument without proper knowledge.
Ce6304 surveying i notes,lecture notes, previous years. Surveying to find local attraction and correct bearing in. Charles ghilani is a professor emeritus of surveying engineering at the pennsylvania state university. Prismatic compass surveying pdf notes download expert civil. Type a the summation of entire included angle is equal to 2n4 x 900. The instruction manual guides the students to solve field problems. This text provides comprehensive yet concise coverage of the essential skills necessary in surveying and civil engineering, such as measurement, distance corrections, leveling, angles, area computation, computer calculations. Statistics and least squares in surveying and gis, 5th edition, and elementary surveying. Contents problems, solutions, examples, exercises, exercises hints and explanations of the below topics basic principles maps representative fraction r. Students are advised to take care of the following. For a given traverse line ij length of line ij, x j. It is an electronic transit theodolite integrated with electronic distance measurement edm to measure both vertical and horizontal angles and the slope distance from the instrument to a particular point, and an onboard computer to collect data and perform.
Chain and compass surveying of an area, booking and plotting, adjustments of traverse, errors in compass surveying and precautions. Download ebook engineering surveying solved problems with answer land survey problems using law of sines and sohcahtoa for land surveying, using extension of pythagorean theorem for finding diagonal of a. True meridian magnetic meridian dip compass surveying. Solving competitive location problems with social media. Orientation of a plane table by solving two point problems is only adopted when a saving of time is a main factor b better accuracy is a main. Appendix i contains question bank and solved problems.
The deflection of a magnetic needle from its true position due to the presence of magnetic influencing material such as iron ore, magnetic rock, underground pipeline, electric cables, iron pipes, electric poles in its vicinity is called local attraction. The subject matter is canvassed along with theory, variety of examples, various types. Compass surveying is not recommended for areas where local attraction is suspected due to the presence of magnetic substances like steel structures, iron ore deposits, electric cables, and so on. To find out this we have to look for a line where the difference between the fore bearing and the back bearing is exactly equal to 180 degrees. Local attraction methods for correcting the bearings affected by local attraction. Plane table survey principles, advantages and disadvantages, equipment, accessories and their uses. Local attraction is the phenomenon by which the magnetic needle is constantly prevented to point towards the magnetic north at a place. Determine the effect of local attraction d none of the above answer.
Syllabus for mine surveying part test 1 online mining exam. Below are the bearings observed in a traverse survey conducted with a prismatic compass at a place where local attraction was suspected. In such a situation magnetic needle does not point towards north south. Local attraction when a magnetic needle is disturbed from its normal position due to influence of external forces such as electric current or magnetic substances, local attraction is said to have occurred. Following readings were taken in a closed traverse. Type b when the summation of entire included angle is not equal to 2n4 x 900. Define the terms i local attraction and ii true bearing. The angle between the magnetic meridian and a line is known as.
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