Types of Levels in Surveying

What is the most widely used direct leveling instrument?

Dumpy Level

What is the main difference between a Dumpy Level and a Wye Level?

The bubble is attached to the level bar in Dumpy Level and attached to the telescope in Wye Level.

What supports the telescope in a Wye Level?

Wyes

How can the telescope in a Wye Level be adjusted?

By releasing the two clamping collars and turning it end for end. Signup and view all the answers

What instrument has a long telescope rigidly attached to the level bar?

Dumpy Level Signup and view all the answers

What permits the bubble in the tube to be centered in a Dumpy Level?

Leveling screws Signup and view all the answers

What is the purpose of a circular spirit attached to the side of the telescope?

Approximate leveling Signup and view all the answers

How does the compensator assist in leveling due to gravity?

Results the optical system to swing into exact position of line of sight automatically Signup and view all the answers

What action should be taken if the leveling staff reading remains constant when checking the compensator?

Compensator is perfect Signup and view all the answers

What is the other name for an automatic level?

Self-adjusting Level Signup and view all the answers

How can the issue of a bubble not being centered at the instant of sighting be eliminated?

Checking the bubble before making each sight Signup and view all the answers

What action can eliminate the problem of a rod not being held plumb?

Waving the rod or using the rod level Signup and view all the answers

How can the mistake of faulty reading of the rod be avoided?

Checking each rod reading before recording Signup and view all the answers

What can be done to eliminate the issue of faulty turning points?

Choosing definite and stable points Signup and view all the answers

How can the variation of temperature affecting leveling be minimized?

Protecting the level from the sun while making observations Signup and view all the answers

What method can help eliminate errors due to Earth's curvature in leveling?

Balancing each backsight distance or applying the computed correction Signup and view all the answers

What is the first step in the differential leveling process?

Take a backsight rod reading on point A Signup and view all the answers

What is the second step in the differential leveling process?

Rotate the telescope toward point B and take a foresight rod reading Signup and view all the answers

How should all data gathered in differential leveling work be recorded?

In a special field notebook ruled with suitable lines Signup and view all the answers

What is the purpose of temporary turning points in differential leveling?

To carry a line of levels from a benchmark to some other station or benchmark Signup and view all the answers

What is the key information that needs to be computed in differential leveling?

Computation of HI’s and elevation of stations Signup and view all the answers

What format is used in recording leveling notes?

Standard Format Signup and view all the answers

What is the elevation of BMb?

125.45 m Signup and view all the answers

What is the backsight reading on TP1?

1.24 m Signup and view all the answers

What is the foresight reading on TP2?

3.18 m Signup and view all the answers

What is the elevation of BMa?

122.38 Signup and view all the answers

What is the elevation of TP3?

125.83 Signup and view all the answers

What is the arithmetic check mentioned in the operation?

3 Signup and view all the answers