Geodetic Surveying And Vertical Control Principles Practice Tests

Question 1

A surveyor needs to determine the coordinates of an unknown point by measuring angles from two known points to the unknown point. Which position fixing method is being applied?

Accepted Answer

Intersection

Answer

Radiation

Answer

Resection

Answer

Traversing

Question 2

Given a Face Left (FL) reading of $35^{\circ}12'20''$ and a Face Right (FR) reading of $215^{\circ}12'40''$, calculate the mean reduced horizontal angle. Provide the result in degrees, minutes, and seconds.

Accepted Answer

35°12'30''

Question 3

Which of the following scenarios represent a systematic error in surveying measurements?

Answer

Thermal expansion of a steel tape due to high ambient temperature

Answer

Incorrect adjustment of the instrument's vertical index

Answer

A surveyor misreading a value on the display

Answer

Atmospheric turbulence causing slight fluctuations in laser path

Question 4

In a Total Station, the tribrach is primarily responsible for the electronic calculation of distance using the time-of-flight principle.

Accepted Answer

False

Answer

True

Question 5

If a surveyor is working in a dense urban environment where they must establish a series of connected points to map a road, which method is most appropriate?

Accepted Answer

Traversing

Answer

Radiation

Answer

Resection

Answer

Intersection

Question 6

A distance $D$ is measured as $150.005$ m. If the true distance is $150.000$ m, calculate the absolute error $\epsilon$ and classify the type of error if this was caused by a consistent calibration offset.

Accepted Answer

0.005 m, Systematic error

Question 7

Which component of an EDM/Total Station is specifically used to adjust the fine pointing of the telescope horizontally?

Accepted Answer

Horizontal tangent screw

Answer

Focusing knob

Answer

Tribrach

Answer

Display panel

Question 8

Given a horizontal angle observation with Face Left (FL) = $45^{\circ}12'10''$ and Face Right (FR) = $225^{\circ}12'50''$, calculate the mean reduced horizontal angle.

Accepted Answer

45^{\circ}12'40''

Question 9

A surveyor identifies a consistent $2^{\circ}C$ temperature bias affecting an EDM distance measurement. Which category of error does this represent?

Accepted Answer

Systematic error

Answer

Gross error

Answer

Random error

Answer

Instrumental mistake

Question 10

If a measured distance $D_{obs} = 150.452\,m$ is subject to a systematic error correction of $\Delta D = +0.005\,m$ due to atmospheric conditions, calculate the corrected distance $D_{true}$.

Accepted Answer

150.457\,m

Question 11

Which of the following scenarios are classified as 'Gross errors' in a surveying context?

Answer

Misreading a graduation on a leveling staff

Answer

Recording a distance of $125.4\,m$ as $152.4\,m$

Answer

Thermal expansion of the steel tape

Answer

Instrumental collimation error

Question 12

In the process of reducing horizontal angles, the mean of Face Left (FL) and Face Right (FR) observations is calculated specifically to eliminate random errors.

Accepted Answer

False

Answer

True

Question 13

Calculate the angular discrepancy for a point where FL = $10^{\circ}20'30''$ and FR = $190^{\circ}20'50''$.

Accepted Answer

20''

Question 14

Given a Bench Mark (BM) with an elevation of $100.000	ext{ m}$, a backsight reading of $1.250	ext{ m}$, and a foresight reading of $0.850	ext{ m}$ at a second point, determine the Reduced Level (RL) of the second point.

Accepted Answer

100.400 m

Answer

99.600 m

Answer

101.250 m

Answer

102.100 m

Question 15

In a vertical control network, which component is primarily responsible for providing a stable, level platform for the levelling instrument to ensure accurate height transfer?

Accepted Answer

Tripod

Answer

Levelling Staff

Answer

Change Plate

Answer

Auto-level

Question 16

Which of the following items are essential for maintaining accuracy when transferring heights between two points in a differential levelling survey?

Answer

Levelling Staff

Answer

Change Plate

Answer

Auto-level

Answer

Theodolite

Question 17

In the Rise and Fall method, if the reading at the second point is $1.500	ext{ m}$ and the reading at the first point is $1.200	ext{ m}$, the difference is classified as a 'Rise'.

Accepted Answer

False

Answer

True

Question 18

A survey line has a total sum of Rises equal to $2.450	ext{ m}$ and a total sum of Falls equal to $1.850	ext{ m}$. If the starting RL is $50.000	ext{ m}$, calculate the final RL.

Accepted Answer

50.600 m

Question 19

What is the primary purpose of using a change plate during a long-distance differential levelling operation?

Accepted Answer

To provide a stable and consistent base for the levelling staff at turning points.

Answer

To increase the height of the instrument

Answer

To calibrate the auto-level

Answer

To measure horizontal distances

Question 20

If the sum of all backsights is $12.400	ext{ m}$ and the sum of all foresights is $10.900	ext{ m}$, calculate the net difference in elevation between the first and last point.

Accepted Answer

1.500 m

Geodetic Surveying And Vertical Control Principles Practice Tests

Practice Tests

Geodetic Surveying and Vertical Control Principles

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