PS Surveying Methods & Techniques 3

Question 1

Which triangulation figure provides the strongest network geometry and is used in primary control surveys?

Accepted Answer

Braced quadrilateral

Answer

The braced quadrilateral (four sides and both diagonals) provides redundant angle observations and strong geometry, making it the preferred figure for primary triangulation networks.

Question 2

In GPS surveying, the term 'PDOP' refers to:

Accepted Answer

Position Dilution of Precision

Answer

PDOP (Position Dilution of Precision) is a dimensionless factor that quantifies the effect of satellite geometry on the combined horizontal and vertical position accuracy.

Question 3

The figure-closure condition in a triangulation network requires that the sum of angles in each triangle equal:

Accepted Answer

180°00'00"

Answer

Each plane triangle in a triangulation network must satisfy the geometric condition that its three interior angles sum to exactly 180°00'00".

Question 4

When running a differential level circuit, the purpose of using equal backsight and foresight distances is to eliminate the effect of:

Accepted Answer

Curvature of the earth and atmospheric refraction

Answer

Balancing backsight and foresight distances cancels systematic errors due to earth curvature and atmospheric refraction, since both affect the readings equally.

Question 5

A surveyor sets up a total station and measures a horizontal angle of 47°32'18" to point A and 112°15'44" to point B. What is the angle between the two directions?

Accepted Answer

64°43'26"

Answer

The angle between A and B is 112°15'44" − 47°32'18" = 64°43'26".

(PS) Professional Licensed Surveyor Practice Test

(PS) Professional Licensed Surveyor Practice Test

PS Surveying Methods & Techniques 3