Compare radiation and intersection methods of plane table surveying on any two parameters. 

1 Answer

Answer :

Radiation method
Intersection method
1. It requires the plane table to occupy a single station. 
1. This method requires setting the table up at minimum of two stations. 
2. Orientation table is not required. 
2. Orientation is essential and can be done by back sighting.
3. To conduct the survey of an area, the table is kept at a convenient station A commanding a full view of the area to be surveyed. 
3. Two station A and B are selected so that they command a full view of the area to be surveyed. 
4. In this method, rays are drawn from the station to the objects, and the distance from the station to the object are measured and plotted to any suitable scale along respective rays. 
4. In this method distance of base lene only is measured. Distance of object from station is not measured
5 This method is suitable when points to be plotted are within accessible from single station.
 5 This method is suitable for locating inaccessible points by the intersection of the rays drawn from two instruments stations. 

Related questions

Description : Which of the following methods of plane table surveying is used to locate the position of an inaccessible point? (A) Radiation (B) Intersection (C) Traversing (D) Resection

Last Answer : (B) Intersection

Description : State two advantages of plane table surveying

Last Answer : is most rapid method of surveying. 2. it is suitable for magnetic areas. 3.The map can be prepared easily ,and does not require greater skill. 4.Irregular objects can be represented ... is less costly. 7 The check lines detects the errors of measurement and plotting on field itself. 

Description : Describe any one method of orientation of plane table surveying

Last Answer : Orientation by back sighting method: This method is accurate and is always preferred. Procedure: 1.Suppose A and B are two stations.The plane table is set up over A. The table is leveled by spirit level ... are perfect and needle is exactly at 0-0 , the orientation is said to be perfect.

Description : The methods used for locating the plane table stations are (i) Radiation (ii) Traversing (iii) Intersection (iv) Resection The correct answer is (A) (i) and (ii) (B) (iii) and (iv) (C) (ii) and (iv) (D) (i) and (iii)

Last Answer : (C) (ii) and (iv)

Description : Explain ‘Intersection Method’ of plane table surveying with neat sketch. Also give situation when intersection method is used.

Last Answer : 1. Lay out a base line AB and measure it and Plot a distance ab' on sheet using any scale. 2.Set up instrument at A' with a' over A' 3.Orient the table by placing alidade ... the case of the survey of mountainous country. 5. The only linear measurement required is that of a base line.

Description : Mention different sources of errors in theodolite surveying.

Last Answer : Sources of errors in theodolite surveying:- i) Instrumental errors1) Non adjustment of plate bubble. 2) Line of collimation not being perpendicular to horizontal axis. 3) Line of collimation ... causes error due to irregular refraction. 2) High winds cause vibration in instrument.

Description : Enlist the uses of total station in surveying.

Last Answer : The uses of total station are : 1) To measure horizontal, vertical and slope distances. 2) To measure horizontal and vertical angles. 3) To measure the level difference between points. 4) To carry out ... 6) To prepare layout of building. 7) For speedy completion of any type of project work. 

Description : To orient a plane table at a point with two inaccessible points, the method generally adopted, is (A) Intersection (B) Resection (C) Radiation (D) Two point problem

Last Answer : (D) Two point problem

Description : Locating the position of a plane table station with reference to three known points, is known as (A) Intersection method (B) Radiation method (C) Resection method (D) Three point problem

Last Answer : (D) Three point problem

Description : In a plane-table survey, the process of determining the plotted position of a station occupied by the plane-table by means of sights taken towards known points, the locations of which have already been plotted, is known as (a) Radiation (b) Resection (c) Intersection (d) Traversing

Last Answer : (b) Resection

Description : The plotting of inaccessible points in a plane-table survey can be done by the method of (a) Interpolation (b) Radiation (c) Intersection (d) Traversing

Last Answer : (c) Intersection

Description : For locating an inaccessible point with the help of only a plane table, one should use (a) traversing (b) resection (c) radiation (e) Intersection*

Last Answer : (e) Intersection*

Description : Compare theodolite traversing by included angle method with deflection angle method. Which one is suitable?

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Description : State the two methods of setting out curves.

Last Answer : Methods of setting out curves :- 1) Method of offsets or ordinates from the long chord 2) By successive bisection of arcs 3) By offsets from tangents 4) By offsets from chords produced 5) Rankine’s method of tangential angles 6) Two Theodolite method

Description : What are the different methods of contouring? Describe any one method along with sketch . Also write the situation where it is suitable

Last Answer : There are two methods of contouring:- 1. Direct Method 2. Indirect Method - a. By squares  b. By cross section  c. By tacheometric Direct method of contouring - In this ... joining these identical coloured pegs, we get the required contours on ground by this direct method of contouring. 

Description : State the methods of contour interpolation and explain in brief any one.

Last Answer : Methods of interpolation:- i) By Arithmetic calculations ii) By Estimation iii) By Graphical method i) By Arithmetic Calculation: This is very tedious but accurate method and is used for small areas ... in fig.) may now be pricked through the position of the contour points on line PQ.

Description : State the methods of locating contours and explain direct method.

Last Answer : Methods of locating contours :- 1) Direct method 2) Indirect method i) By cross section ii) By Squares (Block Contouring) iii) Tachometric Method Direct method of contouring:- In ... identical coloured pegs, we get the required contours on ground by this direct method of contouring.

Description : State methods of locating contours and explain any one.

Last Answer : Following are the methods of locating contours 1. Direct Method. 2. Indirect method.  a) By Square / Block Contouring  b) By Cross Section  c) Tacheometric Contouring ... squares are plotted and reduced levels are written at their corners and the contours lines are then interpolated.

Description : Define interpolation of contour and state its methods. 

Last Answer : The process of spacing the contours proportionately between the ground points is known as “Interpolation of Contours”. The contours may be interpolated by: 1. Estimation 2. Arithmetical calculations. 3. Graphical method.

Description : Write the use of Gale’s table.

Last Answer : Gale’s traverse table is useful to find out independent coordinates of theodolite traverse by applying necessary corrections to consecutive co-ordinates of the same traverse. Further these independent co-ordinates are useful to draw the accurate traverse without linear and angular errors.

Description : Give the simplest method of finding the area of zero of a zero circle from manufacturers table.

Last Answer : The area of zero circle can be find out simply by using following formula. A = M x C Where, A = Area of zero circle  M = Multiplier or multiplying constant provided in manufacturers table C = Constant of planimeter provide in manufacturers table

Description : Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling? (A) Radiation (B) Intersection (C) Traversing (D) Resection

Last Answer : (D) Resection

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Last Answer : (b) Intersection*

Description : Write any four advantages of intersection method of plane tabling over radiation method of plane tabling.

Last Answer : Advantages of intersection method: 1. Interection method requires less ground distance measurement than radiation method. 2. By this method we can locate inaccessible points which cannot be ... to radiation method, intersection method eliminates undulation error, bisection error and plotting errors.

Description : The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in (A) Chain surveying (B) Traverse method of surveys (C) Triangulation (D) None of these

Last Answer : (A) Chain surveying

Description : The method generally preferred to for contouring an undulating area, is (A) Chain surveying (B) Plane table surveying (C) Tacheometrical surveying (D) Compass surveying

Last Answer : (C) Tacheometrical surveying

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Last Answer : (C) Plane table surveying

Description : In a solution of the three-point problem in plane table surveying, the converging of error is attained through : (a) Concyclic concept (b) Bessel’s method (c) Triangle of error (d) Tracing paper method

Last Answer : (c) Triangle of error

Description : Draw sketch and explain method of traversing of plane table surveying. 

Last Answer : Procedure: 1.Set plane table over station A use plumbing fork for transferring station point from ground on sheet. Draw the direction of magnetic meridian with the help of compass. 2. With the ... scale Similarly, the table can be set at other successive station and traverse is completed.

Description : Describe back sighting method of orientation of plane table surveying.

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Description : State the use of alidade in plane table surveying

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Description : State the limitations of plane table surveying.

Last Answer : 1) It is not suitable for work in wet climate 2) Several accessories are required to be carried hence possibility lost. 3) Replotting of survey work to different scale is difficult in absence of ... ) It is not intended for accurate work. 6) The plane table is essentially a tropical instrument.

Description : Describe in brief resection method of plane table surveying.

Last Answer : This method is used for establishing the instrument stations only. After fixing the stations, details are located either by radiation or intersection. The characteristic feature of resection is that the point ... of resection are (1)The Two Point Problem, and (2)Three Point Problem.

Description : While working on a plane table, the correct rule is: (A) Draw continuous lines from all instrument stations (B) Draw short rays sufficient to contain the points sought (C) Intersection ... drawing second rays (D) Take maximum number of sights as possible from each station to distant objects

Last Answer : (B) Draw short rays sufficient to contain the points sought

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Description : Define following terms and give any two components of each : 1. GIS 2. GPS 

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Description : What is a contour map? Write any two objects of preparing contour map.

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Description : State any two advantages of total station over dumpy level and theodolite.

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Description : State any two application of each of GIS in land information and land environmental field.

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Description : State any two advantages and limitations of remote sensing. 

Last Answer : Following are the advantages of remote sensing Provides data for large areas. Provide data for very remote and inaccessible area. Easy and rapid collection of data. Rapid production ... Needs cross verification with field survey data. Objects can be misclassified or confused. Expensive.

Description : State any two special features of electronic theodolite.

Last Answer : Following are the special features of electronic theodolite 1. Dual side display and keyboard with push buttons / keys 2. Rechargeable Ni-Cd battery with auto power cut off. 3.Compatability with EDM. 4. Communication port

Description : What is the difference between a theodolite and a tacheometer. Give any two characteristics of tacheometer.

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Description : What is meant by permanent adjustment of a theodolite.Enlist any two such adjustment.

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Description : Demonstrate the utility of Remote Sensing and GIS applications in Civil Engineering with appropriate examples. 

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Description : Apply knowledge of total station to prepare a contour map by describing its procedure.

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Description : Describe stepwise procedure to prepare the layout of a small building using total station.

Last Answer : Layout of small building by using total station: 1. On the plan supplied by an architect, number the column serially from left to right and top to bottom starting from top left ... of setting out by comparing the diagonal distance between the extreme column centres to their calculated values.

Description : Describe the procedure to determine co-ordinates of a station using GPS. 

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