Recent questions tagged surveying

by itszee asked Jul 29, 2021 1 view

The process of surveying is therefore in three stages namely:
Answer : (i) Taking a general view This part of the definition is important as it indicates the need to obtain an overall picture of what is required before any type of survey work is undertaken. In ... of quantities, datasheets, drawings and in land surveying maps and plan showing the features on the land....

by itszee asked Jul 23, 2021 0 views

Tacheometric Surveying
Answer : Tacheometric is a branch of surveying in which horizontal and vertical distances are determined by taking angular observation with an instrument known as a tachometer. Tacheometric surveying is adopted in rough ... be prepared for investigation works within a short time on the basis of such survey....

by dhaneshwar murmu asked Jul 14, 2021 0 views

explain setting out simple circular curve explain setting out simple circular curve observed from 10 Jan

by anonymous asked Apr 3, 2021 0 views

Explain the temporary adjustments of prismatic compass.
Answer : Temporary Adjustments of Prismatic Compass 1. Fixing the compass to the tripod The compass is fixed on a tripod by rotating screw head of tripod stand. 2. Centering the compass The prismatic compass ... prism is moved using focusing stud so that readings on graduated ring will be seen clearly. ...

by anonymous asked Mar 27, 2021 0 views

State the fundamental axes and mention their relationship for a dumpy level.
Answer : Fundamental axis of dumpy level are as follows; i) The vertical axis ii) The axis of bubble tube iii) The line of collimation iv) The axis of the telescope Relationship between ... iii) Axis of telescope and line of collimation should coincide when dumpy level is correctly leveled....

by anonymous asked Mar 27, 2021 0 views

Describe with neat sketch, the optical square and explain its principle.
Answer : Principal of optical square :- the angle between the first incident ray and the last reflected ray is twice the angle between the two mirrors OR If there are two plane mirrors whose reflecting surfaces ... is 450 while that between the first incident ray and last reflected ray is 900 .   ...

by anonymous asked Mar 27, 2021 0 views

What consideration would you have while selecting survey stations and survey lines in a chain survey?
Answer : Following points to be considered while selecting survey stations and survey lines 1) Main survey station should be mutually visible. 2) All triangles should be well conditioned. 3) The survey line should lie ... of the area so as to form the frame work of triangles on it to cover maximum area. ...

by anonymous asked Mar 27, 2021 0 views

What are offsets? How are they taken and recorded? Explain with sketch.
Answer : Offsets are lateral measurement to the base line. They are Located by judgment if short And by instruments (optical square or cross staff) if long and measured by metallic tape and shown with their chainages on base line ...

by anonymous asked Mar 27, 2021 1 view

Define fly leveling and profile leveling
Answer : Fly Leveling adopted to transfer bench marks from one place to other .In this leveling only FS & BS are taken.  Profile leveling:- The operation in which the object is to determine the ... known distanced apart along a given line to obtained the accurate outline of the surface of the ground ...

by anonymous asked Mar 27, 2021 0 views

Define : 1) Bench mark 2) Datum surface 3) Line of collimation 4) Change Point 
Answer : 1) Bench mark: - It is a fixed reference point of known elevation.. 2)Datum surface :-It is any arbitrarily assumed level surface from which vertical distance are measured 3) Line of collimation:- ... which the fore and back sights are taken.  It is the point denoting the shifting of the level....

by anonymous asked Mar 27, 2021 0 views

State the situation where plane table is suitable. 
Answer : 1) It is most suitable for preparing small scale maps 2) It is suitable in magnetic are where compass survey is not reliable 3) It is most suitable for filling in details between stations fixed by triangulation 4) It is suitable where accuracy is not required....

by anonymous asked Mar 27, 2021 0 views

How would you detect presence of local attraction at a place ?
Answer : The presence of local attraction may be detected by finding difference of FB & BB of the line. If the fore bearing and back bearing difference is 1800 then there is no local attraction at both ... difference is not equal to 1800 then there is local attraction at both or any one station.  ...

by anonymous asked Mar 27, 2021 1 view

Define: WCB and Quadrantal Bearing system
Answer : Ans.: 1)WCB:-In this system the bearing of a line is always measured clockwise for the north point of the reference meridian towards the line round the circle the angle thus measured is called ... the bearing of a line is measured clockwise from the north point or south point whichever is nearest ....

by anonymous asked Mar 27, 2021 0 views

State the two uses of survey based on geodetic surveying
Answer : Two uses of survey based on geodetic surveying:- i) To determine the precise position s on the surface of the earth. ii) Preparation of maps of large area like map of a country, state ... ) Establishment of GTS bench Marks across the country. iv) Preparation of military maps for defense purposes....

by anonymous asked Mar 27, 2021 0 views

Write errors in leveling and corresponding precaution
Answer : i) Instrument error with respect to bubble tube, leveling staff. 1.If bubble tube is sluggish it may apparently be in the center though the bubble line is not horizontal. Precaution - ... reading. Precaution- Leveling should be properly done by bringing the bubble of bubble tube at Centre....

by anonymous asked Mar 27, 2021 1 view

State the important points kept in mind while recording the staff readings in level pages with respect first reading, intermediate reading, last reading, change point, carry forward from one page to next page-Remark
Answer : 1) First reading is on bench mark point and should be noted in back sight(BS) column 2) Intermediate reading (IS) should be taken on the points between first and last station. 3) Last reading ... column of next page 6) Remark column should have denote First and Last RL along with change points....

by anonymous asked Mar 27, 2021 1 view

State the purposes of following methods of leveling. i)Profile leveling, ii)Fly leveling, iii)Check leveling iv)Reciprocal leveling
Answer : 1. Profile leveling- To determine the undulation of ground surface along given line for alignment of road, canal or pipe, railway line 2. Fly leveling-It is used to for connecting B.M. to ... is used to find the difference in leveling between two points two point obstructed due to river or pond....

by anonymous asked Mar 27, 2021 0 views

Draw a sketch and explain how to find height of chajja or slab using dumpy level.
Answer : Explanation : 1. First the back sight reading is taken on floor level whose RL is known to us; from which RL of instrument axis can be find out by adding RL of BM and BS reading. 2. Now ... staff reading. 4. Finally height of chajja is calculated as RL of slab bottom -  RL of floor top. ...

by anonymous asked Mar 27, 2021 0 views

Explain temporary adjustment.
Answer : 1) Place the telescope parallel to foot screw (fig. a) 2) Bring the bubble at Centre by moving foot screw inward or outward simultaneously. 3) Then turn the telescope through 900 so that it ... 6) Once both positions give centered bubble, leveling of instrument is said to be completed. ...

by anonymous asked Mar 27, 2021 1 view

State fundamental lines and their relationships with each other of dumpy level.
Answer : Fundamental axes of dumpy level : i) The vertical axis ii) The axis of bubble tube iii) The line of collimation iv) The axis of the telescope Relations of Fundamental axes : i) The ... to the axis of the bubble tube. iii) Axis of telescope and line of collimation should coincide. ...