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

What is meant by permanent adjustment of a theodolite.Enlist any two such adjustment.
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1 Answer

Answer :

A theodolite consist of several fundamental lines .In order reading to be accurate, certain desired relationship must exist between the fundamental lines of the instruments. But due to improper handling or excessive use, this relationship may be disturbed and hence the reading from the theodolite may lead to erroneous results. For rectifying a disturbed relationship, some procedures, termed as permanent adjustment are adopted.

Following are the adjustments:

1 Adjustment of plate level

2 Adjustment of line of collimation

3 Adjustment of horizontal axix

4 Adjustment of level tube on the telescope

5 Adjustment of vertical index frame.
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Related questions

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Description : Explain the temporary adjustment of theodolite. 

Last Answer : Temporary Adjustments: The temporary adjustments have to be carried out at every setup of the instrument before taking observations with the theodolite A)Setting up: 1) Place the instrument ... . The parallax can be removed by the sharp focusing until the image appears sharp and clear. 

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Description : Explain the temporary adjustment of transit theodolite

Last Answer : Temporary adjustment of transit theodolite consists of following steps. 1. Setting up theodolite over a station 2. Levelling up 3. Focusing of eyepiece. 4. Focusing of object glass. ... , direct the telescope towards object and turn the focusing screw until the appears clear and sharp. 

Describe the temporary adjustment of theodolite

Description : Describe the temporary adjustment of theodolite

Last Answer : Temporary adjustment of theodolite:- The following operations should be done as temporary adjustments before taking readings on any theodolite. 1. Setting of theodolite on tripod stand - The theodolite ... .e. cross hairs and object) simultaneously focussing of telescope is said to be completed. 

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Describe the use of digital theodolite for measurement of horizontal and vertical angle.

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State four component parts of digital theodolite and state their purpose.

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Explain the procedure adopted with micro optic theodolite to find reduced level.

Description : Explain the procedure adopted with micro optic theodolite to find reduced level.

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Mention different sources of errors in theodolite surveying.

Description : Mention different sources of errors in theodolite surveying.

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

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What are the different fundamental axes of theodolite?

Description : What are the different fundamental axes of theodolite?

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State components of one second micro-optic theodolite.

Description : State components of one second micro-optic theodolite. 

Last Answer : Component parts of micro optic theodolite 1) Telescope 2) Magnification with standard eyepiece. 3) Level tube 4) Foot screws. 5) Tribatch & Trivet 6) Optical micrometer 7) Microscope with ... -batch with foot screws 12) Plate level 13) Collimation slow motion screw 14 ) Horizontal clamp 

Give the desired relationship between fundamental axes of transit theodolite.

Description : Give the desired relationship between fundamental axes of transit theodolite.

Last Answer : The desired relationships between fundamental axes of transit theodolite when in perfect adjustment are : 1) The axis of plate level must be perpendicular to the vertical axis. 2) The line of ... If the instrument has fixed vernier for vertical circle, it must read zero in levelled position. 

Explain the procedure for measuring of vertical angle by using electronic theodolite

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Explain construction and use of ‘one second micro optic theodolite’.

Description : Explain construction and use of ‘one second micro optic theodolite’.

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State different relationship between fundamental lines of theodolite.

Description : State different relationship between fundamental lines of theodolite.

Last Answer : When the instrument is in perfect adjustment, the following relations should exists: 1) The axis of the plate level must be perpendicular to the vertical axis. 2) The line of collimation ... collimation. 5) The vernier of vertical circle must read zero when the telescope is perfectly horizontal.

State the procedure for measurement of deflection angle by transit theodolite

Description : State the procedure for measurement of deflection angle by transit theodolite

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Description : Define telescope inverted and telescope normal for transit theodolite.

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

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Explain the method of repetition to measure horizontal angle using transit theodolite.

Description : Explain the method of repetition to measure horizontal angle using transit theodolite. 

Last Answer : Procedure: 1 Suppose the angle AOB is to be measured by the repetition process. The theodolite is set over O. The instrument is centered and levelled properly.Vernier A is set at 00 and vernier is at 1800 ... 8 The mean of the two angles obtained from two faces gives the actual angle AOB. 

State the fundamental axes of theodolite.

Description : State the fundamental axes of theodolite. 

Last Answer : 1 Vertical axis 2 Axis of plate level 3 The line of collimation 4 Horizontal axis or Trunnion axis 5 The bubble line of the altitude level 

Describe the temporary adjustment of digital level.

Description : Describe the temporary adjustment of digital level.

Last Answer : Temporary adjustment of digital level:- 1) Setup stability:- The digital level should be fixed by rotating its screw head on top of tripod stand. Set tripod legs wide apart to increase the stability ... several times if required. 5) Focus the telescope properly to get clear image of cross hairs .

Enlist the advantages and disadvantages of total station

Description : Enlist the advantages and disadvantages of total station

Last Answer : Advantages of Total station - 1) Great speed of the work 2) Better accuracy in the measurements 3) Low power consumptions 4) Less time required for work. 5) Less man power required ... Total station - 1) Its high initial cost 2) There are no effective checks over its measurements.

Enlist the type of curves in road and railway alignment.

Description : Enlist the type of curves in road and railway alignment.

Last Answer : The type curves in road and railway alignment : 1) Horizontal Curves  a) Simple curve  b) Compound curve  c) Reverse curve  d) Transition curve 2) Vertical Curves  a) Summit curve  b) Valley curve 

Enlist the uses of total station in surveying.

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. 

Define G.I.S. Enlist the key components of G.I.S.

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Last Answer : Definition: A Geographic Information System (GIS) is a computer based tool that allows you to create, manipulate, analyze, store and display information based on its location. Components of GIS: ... plan and business rules, which are the models and operating practices unique to each organization. 

Enlist any four component parts of digital level. State the functions of each.

Description : Enlist any four component parts of digital level. State the functions of each. 

Last Answer : Following are the component parts of Digital Level: 1. Display screen: To show the program going on. It has high resolution. 2.Key Pad- For operating the instrument. 3.Telescope- For ... - Internal focusing is provided, so to observe the object clearly, it is focused with focusing screw. 

What is meant by zero circle? State the advantages of digital planimeter over polar planimeter.

Description : What is meant by zero circle? State the advantages of digital planimeter over polar planimeter.

Last Answer : Zero circle:- When the tracing point is moved along a circle without rotation of the wheel i.e. when the wheel slides without any change in reading ,the circle is known as the zero circle or ... are required for area. 3) It gives more accurate reading 4) Less time required for measurement

What is meant by grade contour? How it will be located in field?

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Last Answer : It is the contour established on a specific grade or gradient along the hill side. OR The line joining the points of equal grade or gradient is termed as grade contour. Procedure for ... all the marked points will give us the required grade contour of 1 in 30 accurately. 

In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per 30 metre tape duly corrected for temperature, slope and sag, the angular error of closure not to exceed (where n is the number of traverse legs) (A) 50" n(B) 30" n(C) 60" n (D) None of these

Description : In precision theodolite traverse if included angles are read twice and the mean reading accepted using both verniers having a least count of 30". Assuming the instrument to be in perfect adjustment, linear measurements correct to 6 mm per ... legs) (A) 50" n (B) 30" n (C) 60" n (D) None of these

Last Answer : (A) 50" n

A theodolite is said to be in perfect adjustment if (A) Rotation axis is vertical to the transit axis (B) Transit axis is perpendicular to line of collimation (C) Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed (D) All the above

Description : A theodolite is said to be in perfect adjustment if (A) Rotation axis is vertical to the transit axis (B) Transit axis is perpendicular to line of collimation (C) Line of collimation sweeps out a vertical plane while the telescope is elevated or depressed (D) All the above

Last Answer : (D) All the above

Which of the following in theodolite work is imperfect adjustment of the instrument (a) Error due to line of collimation being perpendicular to the horizontal axis (b) Error due to axis not to perpendicular of the vertical axis (c) Error due to imperfect graduation (d) Error due to eccentricity of vernires (e) All of the above*

Description : Which of the following in theodolite work is imperfect adjustment of the instrument (a) Error due to line of collimation being perpendicular to the horizontal axis (b) Error due to axis not to perpendicular ... to imperfect graduation (d) Error due to eccentricity of vernires (e) All of the above*

Last Answer : (e) All of the above*

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

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

Last 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.  ... for locating inaccessible points by the intersection of the rays drawn from two instruments stations. 

Name two software for GPS.

Description : Name two software for GPS. 

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Description : List two uses of EDM. 

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State two advantages of plane table surveying

Description : State two advantages of plane table surveying

Last Answer : 1.it 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. 

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

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

Last Answer : GIS:- A geographic information system is a computer based tool that allows you to create, manipulate, analyze ,store & display information based on its location. Components:- 1) hardware 2) ... position &location speed and direction. Components:- 1) Antenna 2) Radio frequency

State any two situations under which tacheometry is preferred.

Description : State any two situations under which tacheometry is preferred. 

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

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

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State the two methods of setting out curves.

Description : State the two methods of setting out curves.

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

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