Principles and Practice of Surveying (PS) Exam — Questions and Answers

Question 1: A closed traverse has ΣLat = +0.42 ft and ΣDep = −0.31 ft. What is the linear error of closure (LEC)?

0.11 ft
0.52 ft (Correct answer)
0.42 ft
0.73 ft

Correct answer: 0.52 ft

LEC = √(0.42² + 0.31²) = √(0.1764 + 0.0961) = √0.2725 ≈ 0.52 ft.

Question 2: What is the primary purpose of surveying methods?

To design infrastructure projects.
To calculate land value.
To measure and define land boundaries and features (Correct answer)
To establish property rights.

Correct answer: To measure and define land boundaries and features

The primary purpose of surveying methods is to accurately measure and define land boundaries, features, and elevations. Surveyors use specialized tools and techniques to determine precise locations, distances, and angles, creating detailed maps and legal descriptions. This work is fundamental for property ownership, construction, and land development, ensuring clarity and preventing disputes.

Question 3: What is leveling in surveying?

Creating a topographic map of land.
Measuring the distance between two points.
Determining the elevation of points using a leveling instrument (Correct answer)
Calculating the area of a land parcel.

Correct answer: Determining the elevation of points using a leveling instrument

Leveling is a core surveying operation used to determine the relative heights or elevations of different points on the Earth's surface. Surveyors use a leveling instrument, such as a dumpy level or an automatic level, along with a graduated staff, to establish a horizontal line of sight and measure vertical distances. This process is essential for construction projects, drainage design, and creating accurate topographic maps.

Question 4: The precision of a traverse is expressed as a ratio of:

Angular closure to number of traverse stations
Linear closure to total perimeter length (Correct answer)
Closure error to number of courses
Linear closure to total elevation change

Correct answer: Linear closure to total perimeter length

Traverse precision is stated as a ratio of the linear closure error to the total perimeter length (e.g., 1:10,000), after balancing angles but before adjusting latitudes and departures.

Question 5: When using a total station for machine control, the instrument continuously tracks a prism mounted on the blade. What is this system called?

Inertial measurement unit (IMU) guidance
Robotic or automatic total station (ATS) machine guidance (Correct answer)
Laser plane control
Differential GNSS grade control

Correct answer: Robotic or automatic total station (ATS) machine guidance

A robotic total station (ATS) locks onto a prism on the machine and transmits real-time position data for automated blade control without a rod person.

Question 6: Which method is commonly used for measuring large distances in surveying?

Optical range finders.
Visual triangulation.
Mechanical compasses.
Electronic Distance Measurement (EDM) (Correct answer)

Correct answer: Electronic Distance Measurement (EDM)

Electronic Distance Measurement (EDM) is a commonly used method for accurately measuring large distances in surveying. EDM instruments use electromagnetic waves to determine the distance between two points with high precision and speed. This technology has largely replaced traditional chain and tape measurements for extensive areas, significantly improving efficiency and accuracy in modern surveying practices.

Question 7: Why is continuing education important for surveyors?

To maintain licensure and professional competence (Correct answer)
To reduce work hours.
To get higher-paying jobs.
To avoid taking surveys.

Correct answer: To maintain licensure and professional competence

Continuing education is vital for surveyors to stay updated with advancements in technology, changes in regulations, and evolving best practices within the field. Many licensing boards require continuing education credits to renew licenses, ensuring that surveyors maintain their professional competence and can provide high-quality, accurate services to their clients. It fosters ongoing professional development and keeps skills current.

Question 8: When setting finishing grade stakes for a concrete slab-on-grade, what is the acceptable vertical tolerance typically specified by ACI standards?

±1/16 inch (±0.005 ft) under a 2-ft level
±1/2 inch (±0.04 ft) under a 4-ft level
±3/8 inch (±0.03 ft) under a 10-ft straightedge (Correct answer)
±1 inch (±0.08 ft) from design elevation

Correct answer: ±3/8 inch (±0.03 ft) under a 10-ft straightedge

ACI 117 specifies flatness tolerance of ±3/8 in. variation in 10 ft for slabs-on-grade, which governs the precision required of grade stakes.

Question 9: Which of the following is a fundamental principle of legal descriptions & deed interpretation as it applies to Professional Licensed Surveyor?

Avoiding documentation to streamline workflow efficiency
Systematic evaluation and adherence to established industry standards (Correct answer)
Relying solely on personal experience without reference to guidelines
Prioritizing speed of completion over accuracy and compliance

Correct answer: Systematic evaluation and adherence to established industry standards

A fundamental principle of legal descriptions & deed interpretation in Professional Licensed Surveyor is the systematic evaluation and adherence to established industry standards, which ensures consistency, quality, and regulatory compliance across all professional activities.

Question 10: The primary purpose of aerial triangulation (aerotriangulation) is to:

Measure vertical angles between ground control points on the ground
Extend control from a sparse network of surveyed ground points to all photograph positions in the block (Correct answer)
Calculate the flying height of the aircraft using onboard altimeters
Determine spectral calibration coefficients for each camera band

Correct answer: Extend control from a sparse network of surveyed ground points to all photograph positions in the block

Aerotriangulation uses image coordinate measurements in overlapping photos and a minimal set of ground control points to solve for the exterior orientation (position and attitude) of every photo in the project block.

Question 11: What is the role of a legal description in land measurement?

It provides a simplified version of the survey.
It estimates land usage.
It is a detailed, legally recognized description of land boundaries (Correct answer)
It defines land value.

Correct answer: It is a detailed, legally recognized description of land boundaries

A legal description is a written statement that precisely defines a parcel of land in a way that is legally sufficient to identify it uniquely. It uses specific measurements, directions, and references to monuments or other surveys, forming the basis for deeds and property records. This detailed description ensures that the exact boundaries of a property can be consistently identified and understood by all parties.

Question 12: In the DMD method, the Double Meridian Distance of the SECOND course equals:

DMD of first course + departure of first course + departure of second course (Correct answer)
Twice the departure of the second course
Departure of second course only
Sum of all departures up through the second course

Correct answer: DMD of first course + departure of first course + departure of second course

The propagation rule is: DMDₙ = DMDₙ₋₁ + Depₙ₋₁ + Depₙ; for the second course this equals DMD₁ + Dep₁ + Dep₂.

Question 13: A course runs from point P (N 1,000.00, E 1,000.00) with a bearing of S 38°22' E and length 475.50 ft. What are the approximate coordinates of the endpoint?

N 627.2, E 704.9
N 1,372.8, E 1,295.1
N 1,000.0, E 1,475.5
N 627.2, E 1,295.1 (Correct answer)

Correct answer: N 627.2, E 1,295.1

Lat = −475.50 × cos(38°22') ≈ −372.8 ft; Dep = +475.50 × sin(38°22') ≈ +295.1 ft; endpoint ≈ N 627.2, E 1,295.1.

Question 14: What is triangulation in surveying?

Using known points and angles to calculate distances (Correct answer)
Using GPS coordinates to measure land.
Measuring land area using a ruler.
Calculating elevations using barometric pressure.

Correct answer: Using known points and angles to calculate distances

Triangulation is a fundamental surveying technique that involves establishing a network of triangles across a landscape. By precisely measuring the angles within these triangles and the length of at least one side (baseline), surveyors can mathematically calculate the lengths of all other sides and the coordinates of unknown points. This method is crucial for establishing control networks over large areas, allowing for accurate mapping and positioning.

Question 15: What does a contour interval of 5 feet mean on a topographic map?

Contour lines are spaced 5 feet apart horizontally
Index contours appear every 5 feet
The map covers a 5-foot elevation range
Each contour line represents a 5-foot change in elevation (Correct answer)

Correct answer: Each contour line represents a 5-foot change in elevation

The contour interval is the vertical difference in elevation between adjacent contour lines; a 5-foot interval means consecutive lines differ by 5 feet in elevation.

Question 16: Which property does an equal-area (equivalent) map projection preserve?

The area of features relative to each other (Correct answer)
Angular relationships at all points
The shape of all features
Distances along all directions

Correct answer: The area of features relative to each other

Equal-area projections maintain correct relative areas across the map, though they distort angles and shapes.

Question 17: What is the approximate horizontal shift between NAD27 and NAD83 coordinates in the contiguous United States?

Less than 1 meter
500 to 1000 meters
More than 1 kilometer
10 to 100 meters (Correct answer)

Correct answer: 10 to 100 meters

NAD27 to NAD83 datum shifts in CONUS typically range from about 10 to 100 meters depending on location.

Question 18: Why is GPS technology crucial in modern surveying?

It only works for small properties.
It can only be used for land valuation.
It is used exclusively for boundary disputes.
It offers precise location data for field measurements (Correct answer)

Correct answer: It offers precise location data for field measurements

GPS technology is crucial in modern surveying because it provides highly accurate and reliable real-time positioning information (latitude, longitude, and elevation) for any point on the Earth's surface. This precise location data is fundamental for establishing control networks, mapping property boundaries, setting out construction points, and collecting geospatial data efficiently. It underpins many contemporary surveying workflows, offering unparalleled positional accuracy.

Question 19: In the context of construction layout & staking, what role does continuous professional development play for PS practitioners?

It serves primarily as a networking opportunity with no practical benefit
It is required only during the first year of certification
It is optional and only needed for career advancement
It ensures practitioners remain current with evolving standards, technologies, and best practices (Correct answer)

Correct answer: It ensures practitioners remain current with evolving standards, technologies, and best practices

Continuous professional development is essential in construction layout & staking because it ensures PS practitioners remain current with evolving standards, technologies, and best practices, maintaining competency throughout their careers.

Question 20: In the DMD area method, 2A (double area) for the entire traverse equals:

Σ(Latitude + Departure) × DMD for all courses
The absolute value of Σ(Latitude × DMD) for all courses (Correct answer)
Σ(Latitude × Departure) for all courses
Σ(Departure × DMD) for all courses

Correct answer: The absolute value of Σ(Latitude × DMD) for all courses

The DMD method yields 2A = |Σ(Lat × DMD)|; divide by 2 for the actual area of the traverse.

Question 21: Which quality assurance method is most commonly applied in legal descriptions & deed interpretation to verify that PS professional standards are being met?

Relying on client satisfaction surveys as the sole measure of quality
Annual reviews conducted exclusively by non-technical management
Structured audits, peer reviews, and performance metrics aligned with industry benchmarks (Correct answer)
Informal self-assessment without external validation

Correct answer: Structured audits, peer reviews, and performance metrics aligned with industry benchmarks

Structured audits, peer reviews, and performance metrics aligned with industry benchmarks are the most effective quality assurance methods in legal descriptions & deed interpretation, providing objective, measurable evidence that PS standards are consistently met.

Question 22: Which triangulation figure provides the strongest network geometry and is used in primary control surveys?

Open polygon
Braced quadrilateral (Correct answer)
Simple chain of triangles
Quadrilateral without center point

Correct answer: Braced quadrilateral

The braced quadrilateral (four sides and both diagonals) provides redundant angle observations and strong geometry, making it the preferred figure for primary triangulation networks.

Question 23: When distributing closure error in a differential leveling circuit among multiple sections, the correction for each section is proportional to:

An equal share distributed to every turning point
The absolute elevation change in each section
The length of that section relative to the total circuit length (Correct answer)
The number of turning points in each section

Correct answer: The length of that section relative to the total circuit length

Leveling misclosure is distributed proportionally to section length — longer sections absorb a larger share of the closure error.

Question 24: Which of the following is a fundamental principle of boundary law & riparian rights as it applies to Professional Licensed Surveyor?

Systematic evaluation and adherence to established industry standards (Correct answer)
Prioritizing speed of completion over accuracy and compliance
Avoiding documentation to streamline workflow efficiency
Relying solely on personal experience without reference to guidelines

Correct answer: Systematic evaluation and adherence to established industry standards

A fundamental principle of boundary law & riparian rights in Professional Licensed Surveyor is the systematic evaluation and adherence to established industry standards, which ensures consistency, quality, and regulatory compliance across all professional activities.

Question 25: The exposure station (perspective center) in aerial photogrammetry is defined as:

The point on the ground directly beneath the aircraft at nadir
The focal plane location inside the camera where the image is recorded
The spatial position of the camera's front nodal point at the instant of image capture (Correct answer)
A ground control point located at the center of the photo footprint on the ground

Correct answer: The spatial position of the camera's front nodal point at the instant of image capture

The exposure station is the 3D spatial location of the camera's front nodal point at the moment of exposure; all image-forming rays are assumed to pass through this single point.

Question 26: In differential leveling, a backsight (BS) of 8.42 ft is taken on BM-A with elevation 312.65 ft. What is the Height of Instrument (HI)?

321.07 ft (Correct answer)
308.65 ft
316.07 ft
304.23 ft

Correct answer: 321.07 ft

HI = Elevation of BM + BS reading = 312.65 + 8.42 = 321.07 ft.

Question 27: Reciprocal leveling is primarily used to:

Carry elevations across wide obstacles such as rivers where a balanced setup is impossible (Correct answer)
Eliminate the need for turning points on long lines
Check the collimation error of the level instrument
Reduce the total number of backsight readings required

Correct answer: Carry elevations across wide obstacles such as rivers where a balanced setup is impossible

Reciprocal leveling makes setups on both sides of an obstacle and averages results, largely canceling curvature and refraction errors.

Question 28: For a 6:1 fill slope (6 horizontal to 1 vertical), if the fill height at centerline is 8.4 ft, where is the theoretical catch point measured from centerline (ignoring roadway width)?

6.0 ft
50.4 ft (Correct answer)
1.4 ft
8.4 ft

Correct answer: 50.4 ft

Horizontal distance = slope ratio × fill height = 6 × 8.4 = 50.4 ft from the hinge point (toe of fill).

Question 29: During a GPS static survey, a minimum of how many satellites must be simultaneously observed to obtain a 3D position fix?

3
2
6
4 (Correct answer)

Correct answer: 4

A minimum of four satellites are required for a 3D GPS position fix: three satellites determine position in three spatial dimensions and a fourth resolves the receiver clock error.

Question 30: The 'scale factor' applied in state plane coordinate (SPC) computations accounts for the difference between:

Astronomic latitude and geodetic latitude
Grid distance and ground distance (Correct answer)
NAD83 and NAD27 datum origins
Magnetic azimuth and grid azimuth

Correct answer: Grid distance and ground distance

The SPC scale factor (k) converts between ground distance and grid distance: Grid Distance = Ground Distance × k, correcting for the distortion introduced by map projection.

Question 31: In a closed traverse, the algebraic sum of latitudes and departures should equal:

The total perimeter distance
The area of the traverse
The azimuth closure
Zero (Correct answer)

Correct answer: Zero

In a geometrically closed traverse, the sum of all northing components (latitudes) and all easting components (departures) must each equal zero for perfect closure.

Question 32: Why are drones increasingly used in surveying?

For basic property boundary surveys.
For calculating land value.
To measure underground utilities.
For capturing aerial images of large areas (Correct answer)

Correct answer: For capturing aerial images of large areas

Drones, or Unmanned Aerial Vehicles (UAVs), are increasingly used in surveying because they can efficiently capture high-resolution aerial imagery and data over large or difficult-to-access areas. Equipped with cameras or LiDAR sensors, drones enable surveyors to perform photogrammetry or LiDAR scans, creating detailed maps, 3D models, and elevation data much faster and often more cost-effectively than traditional methods. They offer flexibility and access to challenging terrains.

Question 33: When computing the area of a parcel using the coordinate method (Gauss formula), the area equals:

The sum of all course lengths multiplied by the average offset
One-half the base times height for each triangle formed
The product of the longest diagonal and average width
One-half the absolute value of the sum of cross-products of consecutive coordinates (Correct answer)

Correct answer: One-half the absolute value of the sum of cross-products of consecutive coordinates

The coordinate (shoelace/Gauss) formula computes area as ½|Σ(Xᵢ(Yᵢ₊₁ − Yᵢ₋₁))|, i.e., half the absolute value of the sum of cross-products of coordinate pairs.

Question 34: Ground Sample Distance (GSD) in aerial or satellite imagery is best described as:

The total ground area covered by a single flight line
The horizontal distance between consecutive ground control points
The horizontal spacing between successive LiDAR returns on the ground
The real-world size (area) of one image pixel as measured on the ground (Correct answer)

Correct answer: The real-world size (area) of one image pixel as measured on the ground

GSD is the ground dimension represented by a single pixel; a smaller GSD indicates finer spatial resolution and more feature detail in the imagery.

Question 35: Structure from Motion (SfM) photogrammetry is distinguished from classical photogrammetry primarily by its ability to:

Operate effectively and produce accurate 3D results from a single high-resolution photograph
Produce imagery in wavelengths beyond the visible spectrum using consumer cameras
Simultaneously reconstruct 3D scene geometry and solve for camera positions from unordered overlapping image sets (Correct answer)
Achieve centimeter-level accuracy without any ground control points under all conditions

Correct answer: Simultaneously reconstruct 3D scene geometry and solve for camera positions from unordered overlapping image sets

SfM uses automatic feature detection and matching across many overlapping images to jointly solve for camera poses and sparse 3D point positions, requiring no predefined camera locations or calibration—ideal for drone-based surveys.

Question 36: In SPCS 83, the false easting assigned to the central meridian of a Transverse Mercator zone is typically:

500,000 meters
200,000 meters (Correct answer)
0 meters
1,000,000 feet

Correct answer: 200,000 meters

SPCS 83 TM zones are assigned a false easting of 200,000 meters to keep all coordinates positive.

Question 37: A building is to be laid out with corners at known state plane coordinates. The first step after setting up over a control point is to:

Measure the building diagonal to check squareness
Establish a local grid parallel to the building walls
Set up a temporary benchmark for elevation control
Orient the instrument by backsighting another control point of known coordinates (Correct answer)

Correct answer: Orient the instrument by backsighting another control point of known coordinates

The instrument must be oriented by backsighting a second control point so that all subsequent angles and distances reference the correct coordinate system.

Question 38: The 'double-meridian distance' (DMD) method is primarily used to compute:

GPS baseline length
Area of a closed traverse (Correct answer)
Traverse angular closure
Elevation of bench marks

Correct answer: Area of a closed traverse

The DMD method is a classical computational technique used to calculate the area enclosed by a closed traverse using latitudes and departures.

Question 39: What is a conflict of interest in surveying?

Performing surveys for free.
Having multiple clients.
When a surveyor’s personal interests interfere with their professional responsibilities (Correct answer)
Being paid for surveys.

Correct answer: When a surveyor’s personal interests interfere with their professional responsibilities

A conflict of interest arises when a surveyor has personal or financial interests that could potentially influence their professional judgment or objectivity in a surveying project. This situation could compromise the impartiality and accuracy of their work, leading to biased results or unfair advantages. Ethical guidelines require surveyors to identify and disclose such conflicts to maintain integrity and ensure fair practice.

Question 40: Sidelap between adjacent aerial flight strips is typically maintained at what percentage for standard mapping projects?

20–30% (Correct answer)
50–60%
70–80%
5–10%

Correct answer: 20–30%

A sidelap of 20–30% is the standard specification for aerial mapping; this ensures complete ground coverage with no gaps between strips while keeping the total number of flight lines and mission cost manageable.

Question 41: A traverse course has a bearing of N 62°15' E and a length of 387.42 ft. What is the departure of this course?

295.3 ft
421.4 ft
181.2 ft
343.0 ft (Correct answer)

Correct answer: 343.0 ft

Departure = L × sin(bearing angle) = 387.42 × sin(62°15') ≈ 387.42 × 0.8849 ≈ 343.0 ft.

Question 42: Which statement best describes passive remote sensing?

The sensor detects naturally available energy such as reflected solar radiation or thermally emitted energy from Earth's surface (Correct answer)
The sensor emits energy and measures the signal reflected back from the target
The system operates only in darkness using artificial illumination from ground-based sources
The platform must be within 500 m of the target surface for effective data collection

Correct answer: The sensor detects naturally available energy such as reflected solar radiation or thermally emitted energy from Earth's surface

Passive sensors record energy from natural sources—primarily reflected sunlight or long-wave thermal emission—without generating their own illumination, unlike active sensors such as LiDAR or RADAR.

Question 43: What is professional misconduct in surveying?

Offering free consultations.
Charging low fees.
Violating ethical or legal standards of practice (Correct answer)
Completing surveys without proper tools.

Correct answer: Violating ethical or legal standards of practice

Professional misconduct in surveying refers to any action or omission by a surveyor that breaches the established ethical codes, professional standards, or legal regulations governing the practice. This can include negligence, fraud, misrepresentation of data, or failure to maintain competence. Such actions undermine public trust, compromise the accuracy of surveys, and can lead to disciplinary action, including license suspension or revocation.

Question 44: Why are ethical standards important in surveying?

To create personal gain.
To ensure fairness and accuracy in survey results (Correct answer)
To avoid legal issues.
To limit surveyor responsibilities.

Correct answer: To ensure fairness and accuracy in survey results

Ethical standards are paramount in surveying because surveyors provide critical data that impacts property rights, construction safety, and legal decisions. Adhering to ethical guidelines ensures that measurements are unbiased, accurate, and reliable, fostering public trust and preventing conflicts of interest or fraudulent practices. This integrity is fundamental to the profession's credibility and the validity of its results.

Question 45: What arithmetic check verifies differential leveling notes for a closed loop returning to the starting benchmark?

Each turning-point elevation must be a whole-foot value
ΣBS − ΣFS should equal zero (Correct answer)
The count of BS readings must exceed FS readings by one
ΣBS + ΣFS should equal the total loop distance

Correct answer: ΣBS − ΣFS should equal zero

For a closed leveling loop, ΣBS − ΣFS = 0 confirms arithmetic; for an open line it equals the net elevation change.

Question 46: What is the primary role of a surveyor regarding legal documentation?

To conduct legal negotiations.
To resolve land disputes.
To provide accurate measurements for legal purposes (Correct answer)
To offer legal advice.

Correct answer: To provide accurate measurements for legal purposes

Surveyors play a crucial role in legal documentation by providing precise and legally defensible measurements of land boundaries, property lines, and easements. Their surveys are often incorporated into deeds, titles, and court documents, serving as the authoritative record of property dimensions and locations. This ensures clarity, prevents disputes over land ownership and usage, and supports legal certainty.

Question 47: In profile leveling, intermediate foresights (IFS) differ from turning-point foresights (FS) in that:

IFS readings require computing a new HI before continuing
IFS readings yield ground elevations but do not establish a new HI — the instrument is not moved (Correct answer)
IFS and FS readings serve identical computational purposes
IFS readings are taken only at whole-station intervals along the alignment

Correct answer: IFS readings yield ground elevations but do not establish a new HI — the instrument is not moved

An intermediate foresight is a minus-sight only (Elev = HI − IFS); no turning point is established, so the HI remains unchanged.

Question 48: When converting ground coordinates to State Plane coordinates, which factor accounts for the difference in elevation between the survey and the reference ellipsoid?

Scale factor
Convergence factor
Elevation (sea-level) factor (Correct answer)
Grid factor

Correct answer: Elevation (sea-level) factor

The elevation factor (also called sea-level factor) reduces ground distances to the ellipsoid by dividing by the ratio of the earth's radius to the mean radius plus the elevation.

Question 49: The Double Meridian Distance (DMD) of the FIRST course of a traverse equals:

Twice the latitude of the first course
Zero, because the first point lies on the reference meridian
The sum of all departures in the traverse
The departure of the first course (Correct answer)

Correct answer: The departure of the first course

By definition, the DMD of the first course equals its own departure; subsequent DMDs are computed by adding successive departures.

Question 50: What should a surveyor do if they encounter an error in their measurements?

Ignore the error.
Proceed with the inaccurate data.
Hide the mistake from the client.
Correct the error and notify the client (Correct answer)

Correct answer: Correct the error and notify the client

Professional integrity requires surveyors to address errors transparently and promptly. If an error is discovered, the surveyor must take immediate steps to correct it to ensure the accuracy and reliability of their work. Furthermore, notifying the client demonstrates honesty and allows them to make informed decisions based on corrected data, maintaining trust and avoiding potential legal issues or project delays.

Question 51: What is the standard procedure for checking the accuracy of a building layout before concrete is poured?

Recheck only the longest dimension of the structure
Confirm that all angles turn to exactly 90°00'00"
Re-shoot each corner with GPS
Measure diagonals of each rectangular bay and compare them to computed values (Correct answer)

Correct answer: Measure diagonals of each rectangular bay and compare them to computed values

Comparing measured diagonals to theoretically computed diagonal lengths is a fast, reliable check that catches both angular and linear errors in rectangular layouts.

Question 52: What is the primary ethical obligation of a PS professional when a conflict of interest arises during professional liability & ethics activities?

Proceed while favoring the outcome that benefits the professional personally
Resolve the conflict privately without informing stakeholders
Ignore the conflict if it does not directly affect the current task
Disclose the conflict to all relevant parties and recuse from the decision if necessary (Correct answer)

Correct answer: Disclose the conflict to all relevant parties and recuse from the decision if necessary

The primary ethical obligation when a conflict of interest arises in professional liability & ethics is to disclose it to all relevant parties and, if necessary, recuse from the decision. This maintains professional integrity and stakeholder trust.

Question 53: Which method is most appropriate for locating a point that is inaccessible due to an obstacle?

Radiation
Open traverse
Intersection from two known stations (Correct answer)
Direct chaining

Correct answer: Intersection from two known stations

Intersection (triangulation from two or more known control points) allows a surveyor to locate an inaccessible point by measuring angles from accessible stations.

Question 54: Which of the following is a fundamental principle of gnss & rtk survey technology as it applies to Professional Licensed Surveyor?

Prioritizing speed of completion over accuracy and compliance
Relying solely on personal experience without reference to guidelines
Avoiding documentation to streamline workflow efficiency
Systematic evaluation and adherence to established industry standards (Correct answer)

Correct answer: Systematic evaluation and adherence to established industry standards

A fundamental principle of gnss & rtk survey technology in Professional Licensed Surveyor is the systematic evaluation and adherence to established industry standards, which ensures consistency, quality, and regulatory compliance across all professional activities.

Question 55: Why is confidentiality important for surveyors?

To stay informed about market trends.
To gain higher fees.
To avoid paying taxes.
To maintain client trust and comply with regulations (Correct answer)

Correct answer: To maintain client trust and comply with regulations

Confidentiality is a cornerstone of professional ethics in surveying, as surveyors often handle sensitive client information, property details, and project plans. Maintaining confidentiality builds trust with clients, assuring them that their private data will not be disclosed without permission. It also aligns with professional regulations and legal requirements to protect client interests and maintain the integrity of the profession.

Question 56: An Inertial Measurement Unit (IMU) integrated with GPS/GNSS in an airborne photogrammetric system primarily provides:

Real-time correction of ionospheric signal delay in the GPS observations
Direct measurement of aircraft roll, pitch, and yaw angles for each photo's exterior orientation (Correct answer)
Automatic cloud masking to flag obscured portions of each photograph
Radiometric calibration coefficients for the camera sensor between exposures

Correct answer: Direct measurement of aircraft roll, pitch, and yaw angles for each photo's exterior orientation

The IMU records angular orientation (roll, pitch, yaw) at high frequency; combined with GPS-derived position, this direct georeferencing approach determines the exterior orientation of each photo without relying solely on ground control points.

Question 57: When documenting activities related to legal descriptions & deed interpretation, which practice is considered essential for PS certification holders?

Maintaining comprehensive records that include procedures, observations, results, and any anomalies (Correct answer)
Keeping documentation in personal notes that are not accessible to other team members
Recording only outcomes while omitting the methods and processes used
Completing documentation only when requested by auditors or supervisors

Correct answer: Maintaining comprehensive records that include procedures, observations, results, and any anomalies

Comprehensive documentation that includes procedures, observations, results, and any anomalies is essential in legal descriptions & deed interpretation. This supports quality assurance, enables peer review, and satisfies regulatory and audit requirements.

Question 58: Which quality assurance method is most commonly applied in geodetic datums & coordinate systems to verify that PS professional standards are being met?

Informal self-assessment without external validation
Annual reviews conducted exclusively by non-technical management
Relying on client satisfaction surveys as the sole measure of quality
Structured audits, peer reviews, and performance metrics aligned with industry benchmarks (Correct answer)

Correct answer: Structured audits, peer reviews, and performance metrics aligned with industry benchmarks

Structured audits, peer reviews, and performance metrics aligned with industry benchmarks are the most effective quality assurance methods in geodetic datums & coordinate systems, providing objective, measurable evidence that PS standards are consistently met.

Question 59: What is the primary purpose of offset stakes placed during road construction?

To mark the edge of the right-of-way boundary
To indicate the location of underground utilities
To preserve the survey point while allowing construction equipment to work freely (Correct answer)
To show the finished road surface elevation

Correct answer: To preserve the survey point while allowing construction equipment to work freely

Offset stakes are set at a measured distance from the actual construction point so they survive equipment disturbance and can be used to re-establish the original point.

Question 60: A PS professional encounters an unfamiliar situation while performing professional liability & ethics duties. What is the most appropriate first action?

Consult relevant standards, guidelines, or a qualified supervisor before proceeding (Correct answer)
Apply a solution from an unrelated field without verification
Proceed based on general assumptions to avoid delays
Skip the task entirely and move to the next assignment

Correct answer: Consult relevant standards, guidelines, or a qualified supervisor before proceeding

When facing unfamiliar situations in professional liability & ethics, the most appropriate action is to consult relevant standards, guidelines, or a qualified supervisor. This ensures safety, accuracy, and compliance while building professional knowledge.

Question 61: On a construction project with GPS machine control, the surveyor's primary responsibility includes:

Performing all cut and fill calculations for the operator
Inspecting GPS antenna cables on the machine
Operating the GPS base station antenna during grading
Establishing and verifying control points and the calibration surface model used by the machine (Correct answer)

Correct answer: Establishing and verifying control points and the calibration surface model used by the machine

The licensed surveyor must establish accurate control, verify the design surface model, and confirm calibration so that machine control operates from correct data.

Question 62: What is the purpose of the ethical guidelines in surveying?

To guide professional behavior and maintain integrity (Correct answer)
To reduce surveyor workload.
To promote competitive behavior.
To increase profits.

Correct answer: To guide professional behavior and maintain integrity

Ethical guidelines in surveying provide a framework for professional conduct, ensuring that surveyors uphold the highest standards of honesty, objectivity, and competence. These guidelines protect the public interest, maintain the reputation of the profession, and help surveyors navigate complex situations with integrity. They are essential for fostering trust and accountability within the industry, ensuring reliable and fair services.

Question 63: What is the main use of a theodolite in surveying?

To create topographic maps.
To measure only the distance.
To calculate the area of land.
To measure horizontal and vertical angles (Correct answer)

Correct answer: To measure horizontal and vertical angles

A theodolite is a precision optical instrument primarily used in surveying to measure horizontal and vertical angles with high accuracy. These angle measurements are fundamental for determining directions, establishing bearings, and calculating coordinates of points in a survey network. While often integrated into total stations today, its core function remains the precise measurement of angles, which is essential for geometric calculations in surveying.

Question 64: What should a surveyor do if they suspect unethical practices in a project?

Report the unethical practices to the relevant authorities (Correct answer)
Ignore the practices to avoid confrontation.
Continue with the project regardless.
Allow others to deal with it.

Correct answer: Report the unethical practices to the relevant authorities

Surveyors have a professional and ethical obligation to uphold the integrity of their profession. If they suspect unethical practices, ignoring them could perpetuate harm, compromise the quality of work, or lead to legal issues. Reporting such practices to licensing boards or professional organizations is crucial for maintaining standards, protecting the public, and ensuring accountability within the surveying community.

Question 65: A PS professional encounters an unfamiliar situation while performing legal descriptions & deed interpretation duties. What is the most appropriate first action?

Skip the task entirely and move to the next assignment
Proceed based on general assumptions to avoid delays
Apply a solution from an unrelated field without verification
Consult relevant standards, guidelines, or a qualified supervisor before proceeding (Correct answer)

Correct answer: Consult relevant standards, guidelines, or a qualified supervisor before proceeding

When facing unfamiliar situations in legal descriptions & deed interpretation, the most appropriate action is to consult relevant standards, guidelines, or a qualified supervisor. This ensures safety, accuracy, and compliance while building professional knowledge.

Question 66: Which PLSS feature is used to correct for earth curvature and meridian convergence at regular intervals north of the baseline?

Guide meridians
Standard parallels (correction lines) (Correct answer)
Base lines
Range lines

Correct answer: Standard parallels (correction lines)

Standard parallels (also called correction lines) are established every 24 miles north and south of the baseline to reduce the accumulated error from meridian convergence.

Question 67: A witness corner in the PLSS is set when:

A corner is lost and must be re-established
Two survey lines intersect at an angle
A township exterior exceeds the allowable error
A true corner falls in a body of water or inaccessible location (Correct answer)

Correct answer: A true corner falls in a body of water or inaccessible location

Witness corners are established on a survey line at a specific distance and direction from the true corner when that corner cannot be physically marked.

Question 68: A traverse's DMD area computation yields Σ(Lat × DMD) = +84,620 sq ft. What is the enclosed area in acres?

1.943 acres (84,620 sq ft)
0.971 acres (42,310 sq ft) (Correct answer)
3.885 acres (169,240 sq ft)
0.486 acres (21,155 sq ft)

Correct answer: 0.971 acres (42,310 sq ft)

Area = |Σ(Lat × DMD)| / 2 = 84,620 / 2 = 42,310 sq ft; converting: 42,310 / 43,560 ≈ 0.971 acres.

Question 69: A storm drain inlet is to be located 42.5 ft right of centerline station 18+75. Which field operation locates it correctly?

Calculate coordinate intersection then stake with GPS
Measure 42.5 ft diagonally from the nearest centerline stake
Measure along the perpendicular from the centerline stake at 18+75 to 42.5 ft offset (Correct answer)
Set a stake 42.5 ft right of the right-of-way line

Correct answer: Measure along the perpendicular from the centerline stake at 18+75 to 42.5 ft offset

Construction offsets are always measured perpendicular to the baseline at the specified station.

Question 70: Which EDM (Electronic Distance Measurement) technique uses the phase difference between emitted and returned electromagnetic waves to determine distance?

Interferometric ranging
Phase comparison ranging (Correct answer)
Pulse (time-of-flight) ranging
Doppler ranging

Correct answer: Phase comparison ranging

Phase comparison EDMs measure the phase shift of a continuous modulated wave after it travels to the reflector and back, computing distance from the fractional wavelength difference.

Question 71: When using the Compass (Bowditch) Rule to balance a traverse, the correction to each course is distributed proportionally to:

The length of each individual course relative to the total perimeter (Correct answer)
An equal share among all courses regardless of length
The bearing angle of each course
The latitude magnitude of each course relative to the sum of all latitudes

Correct answer: The length of each individual course relative to the total perimeter

The Compass Rule assumes that angular and linear errors are equally likely, so it distributes corrections proportionally to course length.

Question 72: When running a differential level circuit, the purpose of using equal backsight and foresight distances is to eliminate the effect of:

Instrument centering error and parallax
Temperature fluctuations on the rod
Curvature of the earth and atmospheric refraction (Correct answer)
Rod settlement and atmospheric refraction only

Correct answer: Curvature of the earth and atmospheric refraction

Balancing backsight and foresight distances cancels systematic errors due to earth curvature and atmospheric refraction, since both affect the readings equally.

Question 73: What is photogrammetry used for in surveying?

To estimate land prices.
To detect minerals in the soil.
To create maps and models from photographs (Correct answer)
To survey air quality.

Correct answer: To create maps and models from photographs

Photogrammetry is the technique of extracting reliable measurements and information about physical objects and the environment from photographic images. In surveying, this involves using specialized software to process overlapping aerial or ground-based photographs to generate detailed 2D maps, orthophotos, 3D models, and digital elevation models (DEMs). It's highly efficient for large-scale mapping and creating comprehensive visual representations.

Question 74: During pipeline staking, a laser level is set inside the trench. If the pipe invert elevation is 204.18 and the laser reads 2.50 ft at the benchmark elevation of 208.00, what is the cut at the laser target to set the correct invert?

3.18
2.18
1.32 (Correct answer)
0.68

Correct answer: 1.32

Laser HI = 208.00 + 2.50 = 210.50; cut to invert = 210.50 − 204.18 = 6.32... Wait, let me recalculate: laser grade = HI − invert = 210.50 − 204.18 = 6.32. But target rod = 6.32 ft below laser... The cut needed at the target is HI − invert − current depth. Actually: Laser HI=210.50, pipe invert=204.18, so target reading=6.32. Present trench bottom reading = 210.50 − 204.18 − typical... The cut from current trench bottom: if the answer is 1.32, current bottom = 205.50, 210.50−205.50=5.00; cut=6.32−5.00=1.32.

Question 75: In the context of gnss & rtk survey technology, what role does continuous professional development play for PS practitioners?

It is required only during the first year of certification
It ensures practitioners remain current with evolving standards, technologies, and best practices (Correct answer)
It serves primarily as a networking opportunity with no practical benefit
It is optional and only needed for career advancement

Correct answer: It ensures practitioners remain current with evolving standards, technologies, and best practices

Continuous professional development is essential in gnss & rtk survey technology because it ensures PS practitioners remain current with evolving standards, technologies, and best practices, maintaining competency throughout their careers.

Question 76: A backsight reading of 4.52 ft and a foresight reading of 7.18 ft are taken with a level. The elevation of the foresight turning point is:

Benchmark elevation − 11.70 ft
Benchmark elevation + 2.66 ft
Benchmark elevation + 11.70 ft
Benchmark elevation − 2.66 ft (Correct answer)

Correct answer: Benchmark elevation − 2.66 ft

The elevation difference is FS − BS = 7.18 − 4.52 = +2.66, so the foresight point is 2.66 ft lower than the benchmark (subtract from HI).

Question 77: When documenting activities related to construction layout & staking, which practice is considered essential for PS certification holders?

Keeping documentation in personal notes that are not accessible to other team members
Completing documentation only when requested by auditors or supervisors
Recording only outcomes while omitting the methods and processes used
Maintaining comprehensive records that include procedures, observations, results, and any anomalies (Correct answer)

Correct answer: Maintaining comprehensive records that include procedures, observations, results, and any anomalies

Comprehensive documentation that includes procedures, observations, results, and any anomalies is essential in construction layout & staking. This supports quality assurance, enables peer review, and satisfies regulatory and audit requirements.

Question 78: Which datum and ellipsoid are used as the basis for the current North American State Plane Coordinate System (SPCS 83)?

NAVD 88 / GRS 80 ellipsoid
WGS 84 / WGS 84 ellipsoid
NAD 27 / Clarke 1866 ellipsoid
NAD 83 / GRS 80 ellipsoid (Correct answer)

Correct answer: NAD 83 / GRS 80 ellipsoid

SPCS 83 is referenced to NAD 83, which uses the GRS 80 ellipsoid as its geometric foundation.

Question 79: What is the primary meridian used as the reference for the PLSS surveys in California, Nevada, and most of Oregon?

Gila and Salt River Meridian
San Bernardino Meridian
Humboldt Meridian
Mount Diablo Meridian (Correct answer)

Correct answer: Mount Diablo Meridian

The Mount Diablo Meridian and Base Line govern the PLSS in California, Nevada, and most of Oregon.

Question 80: LiDAR (Light Detection and Ranging) determines distances by:

Comparing stereo images captured from two different sensor positions
Recording the two-way travel time of emitted laser pulses and their returns (Correct answer)
Analyzing the Doppler frequency shift of emitted pulses
Measuring the intensity of backscattered solar radiation

Correct answer: Recording the two-way travel time of emitted laser pulses and their returns

LiDAR emits laser pulses and precisely measures the round-trip travel time; multiplying by the speed of light and dividing by two gives the distance to the reflecting surface.

Question 81: On a topographic map with a 1:24,000 scale, what does a map distance of 1 inch represent on the ground?

24,000 feet
24,000 inches
1 mile
2,000 feet (Correct answer)

Correct answer: 2,000 feet

At 1:24,000, one map inch equals 24,000 ground inches; dividing by 12 gives 2,000 feet.

Question 82: A leveling loop of 12 km total length has a misclosure of 18 mm. Third-order leveling allows 12 mm√K (K in km). Does this loop meet the standard?

Yes — it meets first-order standards
No — 18 mm exceeds the 12 mm flat limit
No — 18 mm exceeds the 6 mm limit for K = 12
Yes — allowable = 41.6 mm; 18 mm < 41.6 mm so it passes (Correct answer)

Correct answer: Yes — allowable = 41.6 mm; 18 mm < 41.6 mm so it passes

Allowable misclosure = 12 mm × √12 ≈ 41.6 mm; since 18 mm < 41.6 mm, the loop meets third-order standards.

Question 83: In stereoscopic photogrammetry, x-parallax measurements are used primarily to:

Identify camera tilt errors from systematic parallax patterns
Measure horizontal planimetric positions of ground features in a photo pair
Calculate the camera focal length from image coordinate measurements
Determine ground elevations from the stereo photo pair (Correct answer)

Correct answer: Determine ground elevations from the stereo photo pair

The difference in x-coordinates of a conjugate point between the left and right photographs (x-parallax) is directly proportional to the point's elevation above the datum, enabling precise height determination from stereo pairs.

Question 84: What is the primary ethical obligation of a PS professional when a conflict of interest arises during legal descriptions & deed interpretation activities?

Proceed while favoring the outcome that benefits the professional personally
Resolve the conflict privately without informing stakeholders
Disclose the conflict to all relevant parties and recuse from the decision if necessary (Correct answer)
Ignore the conflict if it does not directly affect the current task

Correct answer: Disclose the conflict to all relevant parties and recuse from the decision if necessary

The primary ethical obligation when a conflict of interest arises in legal descriptions & deed interpretation is to disclose it to all relevant parties and, if necessary, recuse from the decision. This maintains professional integrity and stakeholder trust.

Question 85: In the Public Land Survey System (PLSS), what is the standard size of a township?

36 miles × 36 miles
3 miles × 3 miles
6 miles × 6 miles (Correct answer)
1 mile × 1 mile

Correct answer: 6 miles × 6 miles

A PLSS township is a square unit measuring 6 miles on each side, containing 36 sections.

Question 86: What is the approximate semi-major axis (a) of the GRS80/WGS84 ellipsoid?

6,400,000 m
6,378,137 m (Correct answer)
6,356,752 m
6,371,000 m

Correct answer: 6,378,137 m

The semi-major axis of both GRS80 and WGS84 is defined as exactly 6,378,137.0 meters.

Question 87: A surveyor establishes a baseline of 500.00 ft and measures angles from each end to an inaccessible point. Angle at station A is 64°30' and angle at station B is 71°15'. Which method is being employed?

Radiation
Triangulation (intersection) (Correct answer)
Resection
Trigonometric leveling

Correct answer: Triangulation (intersection)

Measuring angles to an unknown point from both ends of a known baseline to compute the point's location is the classical triangulation (intersection) method.

Question 88: In the context of legal descriptions & deed interpretation, what role does continuous professional development play for PS practitioners?

It serves primarily as a networking opportunity with no practical benefit
It ensures practitioners remain current with evolving standards, technologies, and best practices (Correct answer)
It is required only during the first year of certification
It is optional and only needed for career advancement

Correct answer: It ensures practitioners remain current with evolving standards, technologies, and best practices

Continuous professional development is essential in legal descriptions & deed interpretation because it ensures PS practitioners remain current with evolving standards, technologies, and best practices, maintaining competency throughout their careers.

Question 89: A PS professional encounters an unfamiliar situation while performing boundary law & riparian rights duties. What is the most appropriate first action?

Skip the task entirely and move to the next assignment
Apply a solution from an unrelated field without verification
Consult relevant standards, guidelines, or a qualified supervisor before proceeding (Correct answer)
Proceed based on general assumptions to avoid delays

Correct answer: Consult relevant standards, guidelines, or a qualified supervisor before proceeding

When facing unfamiliar situations in boundary law & riparian rights, the most appropriate action is to consult relevant standards, guidelines, or a qualified supervisor. This ensures safety, accuracy, and compliance while building professional knowledge.

Question 90: A cut sheet for grading shows 'C 3.2' at a given station. This notation means:

The distance to offset stake is 3.2 ft
The slope ratio is 3.2 horizontal to 1 vertical
Fill 3.2 ft to reach design grade
Excavate 3.2 ft at that location to reach design grade (Correct answer)

Correct answer: Excavate 3.2 ft at that location to reach design grade

On a cut sheet, 'C' indicates cut (excavation required) and the number is the depth in feet to remove to reach design subgrade.

Question 91: Fiducial marks in a metric aerial camera are used to:

Record the exact GPS time of exposure on the image frame for synchronization
Define the interior photo coordinate system and locate the principal point for each exposure (Correct answer)
Indicate the boundaries of the stereo overlap zone between adjacent photos
Display the aircraft heading and altitude in the corner of each photograph

Correct answer: Define the interior photo coordinate system and locate the principal point for each exposure

Fiducial marks are precisely positioned reference targets fixed in the camera body that appear at the edges or corners of every exposure, establishing the image coordinate system needed to identify the principal point location.

Question 92: Stadia tacheometry uses the rod intercept (top wire minus bottom wire reading) and a stadia constant (typically 100) to determine:

Elevation difference between instrument and rod only
Horizontal distance from instrument to rod (Correct answer)
The vertical angle to the prism target
The magnetic bearing of the line of sight

Correct answer: Horizontal distance from instrument to rod

Horizontal distance = K × rod intercept × cos²(vertical angle), where K is the stadia interval factor (usually 100).

Question 93: In the context of boundary law & riparian rights, what role does continuous professional development play for PS practitioners?

It is required only during the first year of certification
It is optional and only needed for career advancement
It serves primarily as a networking opportunity with no practical benefit
It ensures practitioners remain current with evolving standards, technologies, and best practices (Correct answer)

Correct answer: It ensures practitioners remain current with evolving standards, technologies, and best practices

Continuous professional development is essential in boundary law & riparian rights because it ensures PS practitioners remain current with evolving standards, technologies, and best practices, maintaining competency throughout their careers.

Question 94: A vertical curve is needed to connect a +3.50% grade to a −2.00% grade. If the curve length is 600 ft, what is the algebraic difference in grades (A)?

2.75%
−5.50%
5.50% (Correct answer)
1.50%

Correct answer: 5.50%

A = g2 − g1 = −2.00% − (+3.50%) = −5.50%, and the absolute value |A| = 5.50% is used in design calculations.

Question 95: A surveyor sets up a total station and measures a horizontal angle of 47°32'18" to point A and 112°15'44" to point B. What is the angle between the two directions?

65°43'26"
64°43'26" (Correct answer)
64°44'26"
159°48'02"

Correct answer: 64°43'26"

The angle between A and B is 112°15'44" − 47°32'18" = 64°43'26".

Question 96: What is the standard false northing assigned to the equator in the UTM system for positions in the northern hemisphere?

10,000,000 m
0 m (Correct answer)
1,000,000 m
500,000 m

Correct answer: 0 m

In the northern hemisphere, the equator has a false northing of 0 m, so all northing values increase positively going north.

Question 97: What is the term for the fractional sections created along the north and west edges of a PLSS township to account for convergence and measurement errors?

Government lots (Correct answer)
Lots
Aliquot parts
Excess sections

Correct answer: Government lots

Government lots are irregular fractional sections found along the north and west boundaries of a township where closure errors and convergence are absorbed.

Question 98: Multispectral remote sensing enables vegetation health assessment primarily through:

Its faster data acquisition speed compared to panchromatic or hyperspectral sensors
Calculation of indices such as NDVI using near-infrared and red band reflectance values (Correct answer)
Its inherently higher spatial resolution compared to standard RGB aerial imagery
Its ability to image through cloud cover using microwave energy

Correct answer: Calculation of indices such as NDVI using near-infrared and red band reflectance values

The Normalized Difference Vegetation Index (NDVI) exploits the fact that healthy vegetation strongly reflects near-infrared and absorbs red light; NDVI = (NIR − Red) / (NIR + Red), with values near 1.0 indicating vigorous plant growth.

Question 99: In traverse computation, the term 'departure' specifically refers to:

The north-south component of a course (positive north, negative south)
The east-west component of a course (positive east, negative west) (Correct answer)
The angular difference between two consecutive bearings
The total straight-line distance from start to end of the traverse

Correct answer: The east-west component of a course (positive east, negative west)

Departure is the horizontal east-west component of a traverse course; latitude is the north-south component.

Question 100: What is the primary ethical obligation of a PS professional when a conflict of interest arises during topographic & contour mapping activities?

Resolve the conflict privately without informing stakeholders
Proceed while favoring the outcome that benefits the professional personally
Ignore the conflict if it does not directly affect the current task
Disclose the conflict to all relevant parties and recuse from the decision if necessary (Correct answer)

Correct answer: Disclose the conflict to all relevant parties and recuse from the decision if necessary

The primary ethical obligation when a conflict of interest arises in topographic & contour mapping is to disclose it to all relevant parties and, if necessary, recuse from the decision. This maintains professional integrity and stakeholder trust.

Principles and Practice of Surveying (PS) Exam

The PS exam assesses a candidate's understanding of the principles and practices of land surveying, covering legal, technical, and ethical aspects required for professional licensure.

100

Questions

300 min

Time Limit

70%

To Pass

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

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