FUNDAMENTAL SURVEYING Measurement and Data Collection 2

Question 1

A steel tape calibrated at 68°F is used at 95°F. If the tape is 100 ft long, what is the temperature correction?

Accepted Answer

+0.018 ft

Answer

−0.018 ft

Answer

+0.180 ft

Answer

−0.180 ft

Question 2

Which of the following best describes a GPS carrier-phase measurement?

Accepted Answer

Counting the number of complete wavelengths between satellite and receiver

Answer

Measuring the time delay of a code signal

Answer

Measuring Doppler shift of the signal

Answer

Timing the signal strength drop

Question 3

What is the purpose of a plumb bob or optical plummet in surveying?

Accepted Answer

To center the instrument over a ground point

Answer

To measure vertical angles

Answer

To level the instrument

Answer

To measure magnetic declination

Question 4

What is the term for the error caused by the line of sight not being perpendicular to the horizontal axis of a theodolite?

Accepted Answer

Collimation error

Answer

Index error

Answer

Vertical axis error

Answer

Trunnion axis error

Question 5

In total station surveying, what does 'PPM' correction refer to?

Accepted Answer

Parts per million atmospheric correction applied to EDM measurements

Answer

Pulses per minute of the laser

Answer

Pixels per measurement in digital leveling

Answer

Precision per measurement

Question 6

What is the typical accuracy of a survey-grade GNSS receiver in static mode after post-processing?

Accepted Answer

±1–5 cm

Answer

±1–5 m

Answer

±0.1–0.5 mm

Answer

±10–50 cm