Methods Of Leveling

Question 1

Commonly employed method of determining the elevation of points some distance apart by series of set ups of a leveling instrument along a selected route.

Answer 1

Direct or Spirit Leveling

Question 2

Process of determining the difference in elevation between two or more points some distance apart.

Answer 2

Differential Leveling

Question 3

Determining the difference in elevation by employing two level routes simultaneously.

Answer 3

Double-Rodded Leveling

Question 4

More precise method of Leveling. It is the method of determining difference in elevation where in three horizontal hairs(threads) are read and recorded rather than from a single horizontal hair.

Answer 4

Three Wire Leveling

Question 5

The process of determining the difference in elevation along affixed line at designated short measured interval. Necessary for the design and construction of roads, railroads, canals, culverts, bridges, sewer lines.

Answer 5

Profile Leveling

Question 6

Difference in elevation of two points sighted maybe computed from the two consecutive rod readings from the same instrument position.

Answer 6

Rise and Fall Method of Leveling

Question 7

Employed to determine the difference in elevation between two points when it is difficult or impossible to keep back-sight and fore sight short and equal.

Answer 7

Reciprocal Leveling

Question 8

The effect of earths curvature and atmospheric refraction are taken into account in leveling work since the measurements are made in vertical planes and these effects all occur in the same plane.

Answer 8

Curvature and Refraction

Question 9

Done to check if the line of sight of the instrument is in adjustment.

Answer 9

Two-peg Test