Free FS Surveying Principles and Computations Questions and Answers

Question 1

What is Mean Sea Level (MSL)?

Accepted Answer

Average point between high and low tide over time

Answer

Explanation:
Mean Sea Level (MSL) refers to the average point between high and low tide over a period of time. It is used as a reference point for measuring elevations and depths. MSL is important in various fields such as navigation, surveying, and coastal engineering as it provides a consistent baseline for these activities. By taking into account the fluctuations of tides, MSL helps to establish a standard reference for measuring and comparing sea levels at different locations.

Question 2

What is a Benchmark (BM)?

Accepted Answer

A point of known elevation

Answer

Explanation:
A benchmark (BM) is a point of known elevation. It is a reference point used in surveying and construction to establish vertical measurements. By knowing the elevation of a benchmark, surveyors can accurately determine the elevation of other points in the area. This helps in ensuring that structures are built at the correct height and that accurate measurements are taken for various purposes.

Question 3

What is the height of collimation (HOC) for a Level?

Accepted Answer

Height of the instrument after setting up

Answer

Explanation:
The height of collimation (HOC) for a Level refers to the height of the instrument after it has been set up. This is an important measurement in surveying as it allows for accurate leveling and the determination of elevations. By knowing the HOC, surveyors can calculate the difference in elevation between different points on the ground.

Question 4

What is the smallest gradations measurement on a staff in ordinary leveling?

Accepted Answer

0.01m

Answer

Explanation:
The smallest gradations measurement on a staff in ordinary leveling is 0.01m. This means that the staff can be measured in increments of 0.01 meters, allowing for more precise and accurate measurements in the leveling process.

Question 5

What is the first reading that you take after setting up the level?

Accepted Answer

BS

Answer

Explanation:
After setting up the level, the first reading that is taken is the BS (Back sight) reading. The back sight reading is the measurement taken on a point of known elevation, typically a benchmark, to establish a reference point for the level. This reading helps in determining the height difference between the instrument and the benchmark, which is crucial for accurate leveling.

FS - Fundamentals of Surveying Exam Practice Test

FS - Fundamentals of Surveying Exam Practice Test

Free FS Surveying Principles and Computations Questions and Answers