RPLS Surveying Principles and Methods 2

Question 1

When using a total station, what is the purpose of 'face left' and 'face right' observations?

Accepted Answer

To eliminate systematic instrumental errors by averaging both face readings

Answer

To measure horizontal angles twice for redundancy

Answer

To check that the tribrach is level

Answer

To calibrate the EDM distance measurement

Question 2

A survey crew measures a traverse leg as 452.78 ft. The EDM has a constant error of +0.005 m and a scale error of 5 ppm. What type of error is the ppm component?

Accepted Answer

Systematic proportional error

Answer

Constant error

Answer

Random error

Answer

Blunder

Question 3

In a closed traverse, what does the term 'closure error' refer to?

Accepted Answer

The vector difference between the computed final position and the starting point

Answer

The difference between the measured and theoretical bearing

Answer

The sum of all interior angles minus the theoretical sum

Answer

The difference in elevation between first and last benchmark

Question 4

What is the primary purpose of establishing control points in a large survey project?

Accepted Answer

To provide a network of accurately known positions from which detail surveys are referenced

Answer

To mark property corners permanently

Answer

To document historical land use

Answer

To set benchmarks for construction staking only

Question 5

A surveyor observes a vertical angle of +3°15'30" to a target. If the instrument height is 5.25 ft and the target height is 6.00 ft, what additional data is needed to compute the elevation difference?

Accepted Answer

The horizontal distance between instrument and target

Answer

The magnetic declination

Answer

The atmospheric pressure at each point

Answer

The GPS coordinate of the instrument

Question 6

In differential leveling, which type of rod reading provides a check on instrument settlement?

Accepted Answer

Turning point reading taken twice (check rod)

Answer

Backsight reading

Answer

Foresight reading

Answer

Intermediate sight

Question 7

A surveyor is running a level line and the sum of backsights is 42.316 m while the sum of foresights is 41.884 m. What is the total change in elevation?

Accepted Answer

+0.432 m

Answer

-0.432 m

Answer

-84.200 m

Answer

+84.200 m