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Advantages and DisAdvantages of Dumpy Level Survey

Surveying may be a vital a part of engineering . Knowledge of surveying is incomplete without the knowledge of leveling. The Dumpy level may be a commonly used leveling instrument. To be familiar with this leveling instrument and find out how to work it one should read the subsequent article carefully.

Dumpy Level Survey

What is Dumpy Level?

The Dumpy level is an optical surveying leveling instrument consisting a telescope tube firmly secured in two collars fixed by adjusting screws to the stage by the vertical spindle.

The telescope of Dumpy level can rotate only during a horizontal plane. Relative elevation of various points of a surveying land is decided with Dumpy level .

English engineer William Gravatt is taken into account because the inventor of the Dumpy level . He invented Dumpy level in 1832 while using the traditional Y level.

A Dumpy level is additionally called a builder's level, an automatic level.

Use of Dumpy Levels in Surveying

The Dumpy level is especially utilized in surveying for the subsequent purposes:

  • To work out relative height and distance among different locations of a surveying land.
  • To work out relative distance among different locations of a surveying land.

Advantages

The Dumpy level may be a widely used surveyor's instrument in surveying. the benefits which have made the Dumpy level so popular is given below.

  • Simple construction with fewer movable parts.
  • Fewer adjustments to be made.
  • Due to the rigidity of dumpy levels, it retains its two adjustment for an extended time.
  • High optical power.

Disadvantages

There are few limitation or disadvantages of Dumpy level . These limitations are given below.

  • Civil Engineers may find it difficult in making accurate measurements.
  • Difficulty in using.

Parts of Dumpy Levels

Following are the most parts of Dumpy level instrument.

  1. Telescope
  2. Eye-Piece
  3. Ray Shade
  4. Objective End
  5. Longitudinal Bubble
  6. Focusing Screws
  7. Foot Screws
  8. Upper parallel Plate
  9. Diaphragm Adjusting Screws
  10. Bubble Tube Adjusting Screws
  11. Transverse Bubble Tube
  12. Foot Plate

How to Use a Dumpy level for Surveying

To conduct Dumpy level survey the subsequent instruments is required.

  • Dumpy Level
  • Tripod
  • E meter staff or English staffs
What's the difference between plain and geodetic surveying?

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