LSIT Surveying Fundamentals 4

Question 1

In a road curve, the 'degree of curve' using the chord definition is defined as the central angle subtended by a chord of:

Accepted Answer

100 ft

Answer

Under the chord definition, the degree of curve is the central angle subtended by a 100-ft chord; this definition is commonly used in railroad surveying.

Question 2

Which instrument measures both horizontal and vertical angles and is used for electronic distance measurement (EDM)?

Accepted Answer

Total station

Answer

A total station integrates an electronic theodolite with an EDM, allowing simultaneous measurement of horizontal angles, vertical angles, and slope distances.

Question 3

The geodetic datum NAD 83 is referenced to which ellipsoid?

Accepted Answer

GRS 80

Answer

NAD 83 is based on the Geodetic Reference System 1980 (GRS 80) ellipsoid, though it is nearly identical to the WGS 84 ellipsoid used by GPS.

Question 4

A 'foresight' in leveling operations is a rod reading taken on:

Accepted Answer

A turning point or new point whose elevation is to be determined

Answer

A foresight rod reading is taken on a turning point or a new point to determine its elevation using the established height of instrument.

Question 5

When using a total station, 'face left' and 'face right' observations are averaged primarily to eliminate:

Accepted Answer

Collimation error and vertical axis tilt

Answer

Observing in both face-left and face-right positions and averaging the results cancels out systematic errors such as collimation error and horizontal axis tilt.

(LSIT) Land Surveyor in Training Practice Test

(LSIT) Land Surveyor in Training Practice Test

LSIT Surveying Fundamentals 4