FUNDAMENTAL SURVEYING Surveying Equipment & GPS/GNSS

Question 1

What is the purpose of a 'prism constant' when using a total station with a prism?

Accepted Answer

To correct for the optical offset between the prism face and its mechanical center

Answer

The prism constant offsets the EDM measurement to account for the distance from the prism's optical reflective plane to the pole's plumb point.

Question 2

What is 'stadia' in surveying?

Accepted Answer

An optical distance measurement method using the rod intercept between stadia crosshairs

Answer

Stadia measures distance by reading the rod intercept between the upper and lower stadia hairs of a transit/level and multiplying by the stadia factor (usually 100).

Question 3

What is the function of an optical plummet on a total station?

Accepted Answer

To accurately center the instrument over a ground point

Answer

The optical plummet (or laser plummet) allows the surveyor to precisely center the instrument over a ground monument by looking straight down through a prism or laser.

Question 4

Which component of a total station measures the horizontal circle reading electronically?

Accepted Answer

The absolute encoder on the horizontal circle

Answer

An absolute encoder on the horizontal circle reads the angular position directly in any orientation, eliminating the need to set a reference zero during setup.

Question 5

What does 'GNSS' stand for in modern surveying?

Accepted Answer

Global Navigation Satellite System

Answer

GNSS refers to all global satellite positioning systems collectively, including GPS (US), GLONASS (Russia), Galileo (EU), and BeiDou (China).

FUNDAMENTAL SURVEYING Practice Test

FUNDAMENTAL SURVEYING Practice Test

FUNDAMENTAL SURVEYING Surveying Equipment & GPS/GNSS