FUNDAMENTAL SURVEYING Distance Measurement & Traversing 3

Question 1

What is the Transit Rule for traverse adjustment?

Accepted Answer

Distribute errors proportional to the absolute values of latitudes and departures

Answer

The Transit Rule distributes closure errors proportional to the magnitude of each course's latitude and departure components.

Question 2

A course has a bearing of N 32 E and a distance of 150 ft. What is its departure?

Accepted Answer

79.5 ft

Answer

Departure = 150 times sin(32) = 150 times 0.5299 = approximately 79.5 ft.

Question 3

What is 'trilateration' in surveying?

Accepted Answer

Determining positions by measuring distances only (no angles)

Answer

Trilateration establishes positions by measuring only distances between points, rather than angles, and is the fundamental principle behind GPS positioning.

Question 4

What correction is applied when a tape is supported only at its ends (catenary curve)?

Accepted Answer

Sag correction

Answer

A sag correction is subtracted because a tape hanging between two end supports sags into a catenary, making the measured length longer than the true horizontal distance.

Question 5

In US surveying, one rod (also called a pole or perch) equals how many feet?

Accepted Answer

16.5 ft

Answer

One rod equals 16.5 feet (one-quarter of a chain), a unit commonly found in older deeds and public land survey descriptions.

FUNDAMENTAL SURVEYING Practice Test

FUNDAMENTAL SURVEYING Practice Test

FUNDAMENTAL SURVEYING Distance Measurement & Traversing 3