FUNDAMENTAL SURVEYING Angles, Bearings & Azimuths 2

Question 1

What instrument is used to directly measure horizontal and vertical angles in modern surveying?

Accepted Answer

Total station or theodolite

Answer

Dumpy level

Answer

Planimeter

Answer

Alidade

Question 2

Measuring a horizontal angle in both the direct and reverse positions of a theodolite (face left and face right) is done to:

Accepted Answer

Eliminate instrumental errors such as eccentricity and collimation error

Answer

Double the precision of distance measurement

Answer

Determine magnetic declination automatically

Answer

Compute elevation differences from angle data

Question 3

A vertical angle of -5 degrees 30 minutes indicates the line of sight is:

Accepted Answer

Directed downward (a depression angle)

Answer

Directed upward from the instrument

Answer

Horizontal

Answer

Below the geoid

Question 4

What is 'grid north' in the context of US state plane coordinates?

Accepted Answer

The north direction of the state plane coordinate grid lines

Answer

The direction toward the geographic North Pole

Answer

The direction a compass points in a given state

Answer

The azimuth corrected for magnetic declination only

Question 5

Converting a bearing of S 45 W to an azimuth gives:

Accepted Answer

225 degrees

Answer

135 degrees

Answer

315 degrees

Answer

45 degrees

Question 6

What is the 'angle to the right' (clockwise angle) measurement method?

Accepted Answer

Measuring all horizontal angles clockwise from the backsight to the foresight

Answer

Measuring deflection angles only to the right of the backsight

Answer

Measuring angles from the previous course counterclockwise

Answer

Measuring interior angles from north