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Sample PEC EPE Geoinformatics Practice Questions

Try these sample questions to review concepts for the PEC EPE Geoinformatics exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A geodetic GPS survey in the Potohar plateau records an ellipsoidal height (h) of 542.80 m on WGS84. The local geoid undulation (N) derived from the national geoid model is -28.40 m. What is the corresponding orthometric height (H) above mean sea level?
A.514.40 m
B.571.20 m
C.542.80 m
D.-571.20 m
Explanation: Orthometric height H and ellipsoidal height h are related to geoid undulation N by the fundamental geodetic formula h = H + N, which rearranges to H = h - N. Substituting the values yields H = 542.80 m - (-28.40 m) = 542.80 m + 28.40 m = 571.20 m. Because the geoid lies below the WGS84 ellipsoid in this region (negative undulation), the orthometric height is larger than the ellipsoidal height.
2The Everest 1830 ellipsoid historically used in South Asian geodetic networks (Kalianpur datum) has a semi-major axis a = 6,377,276.345 m and flattening 1/f = 300.8017. Compared to the WGS84 ellipsoid (a = 6,378,137.000 m, 1/f = 298.2572), which statement correctly describes the geometrical relationship between these two reference surfaces?
A.Everest 1830 has a smaller equatorial radius and greater polar flattening than WGS84
B.Everest 1830 has a smaller equatorial radius and is more spherical (less flattened) than WGS84
C.Everest 1830 has a larger equatorial radius and greater polar flattening than WGS84
D.Everest 1830 has identical semi-major axis but differs only in rotational velocity
Explanation: The supplied Everest semi-major axis is 860.655 m smaller. Its flattening, 1/300.8017, is also smaller than 1/298.2572, so it is less flattened. A datum transformation must use parameters appropriate to the particular source datum and region; ellipsoid dimensions alone do not determine those parameters.
3A geoinformatics engineer is configuring a project database for engineering works in Islamabad (longitude 73°04' E, latitude 33°42' N). What is the standard Universal Transverse Mercator (UTM) zone number and Central Meridian (CM) for this location?
A.Zone 42, Central Meridian 69° E
B.Zone 43, Central Meridian 75° E
C.Zone 43, Central Meridian 72° E
D.Zone 44, Central Meridian 81° E
Explanation: UTM zones are 6° wide in longitude and numbered 1 to 60 starting from 180° W. The zone number for longitude λ in the Eastern hemisphere is calculated as Zone = floor((λ + 180) / 6) + 1. For λ = 73°04' E (73.067°), Zone = floor((73.067 + 180) / 6) + 1 = floor(42.178) + 1 = 43. The Central Meridian of UTM Zone 43 is given by CM = (Zone * 6) - 183 = (43 * 6) - 183 = 258 - 183 = 75° E. Zone 43 covers longitudes 72° E to 78° E.
4A cadastral baseline in UTM Zone 43 has an easting of E = 650,000 m. Using a mean Earth radius R = 6,371,000 m and a central scale factor k0 = 0.9996, what is the approximate point scale factor (k) at this easting?
A.0.99960
B.0.99988
C.1.00028
D.1.00145
Explanation: In a Transverse Mercator projection, point scale factor k is approximated by k ≈ k0 * [1 + x² / (2*R²)], where x is the distance from the central meridian: x = E - 500,000 m = 650,000 m - 500,000 m = 150,000 m. Evaluating the bracketed term: x² / (2*R²) = (150,000)² / (2 * 6,371,000²) = 2.25e10 / 8.1179e13 ≈ 0.00027716. Thus, k ≈ 0.9996 * (1 + 0.00027716) ≈ 0.999877 ≈ 0.99988. At 150 km from the central meridian, the scale factor has increased from 0.9996 toward unity.
5Using the convention γ ≈ (λ - λ0) sin φ, calculate first-order UTM grid convergence at latitude 31°30' N, longitude 74°20' E in Zone 43, whose central meridian is 75° E.
A.-0.348° (-20.9')
B.+0.348° (+20.9')
C.-0.667° (-40.0')
D.+0.522° (+31.3')
Explanation: Grid convergence γ is the angle between true (geodetic) north and grid north. For a conformal cylindrical projection like UTM, it is computed to first order as γ ≈ Δλ * sin(φ), where Δλ = λ - λ0. Here, Δλ = 74°20' - 75°00' = -0°40' = -0.6667°. The latitude is φ = 31.5°, and sin(31.5°) ≈ 0.5225. Therefore, γ ≈ -0.6667° * 0.5225 ≈ -0.3483° ≈ -20.9'. The negative sign indicates that grid north lies to the west of true north because the station is west of the central meridian.
6Which of the following geometric properties is characteristic of the Lambert Conformal Conic (LCC) projection with two standard parallels?
A.Meridians are curved lines and parallels are straight horizontal lines intersecting at right angles
B.Scale factor is exactly 1.0 along both standard parallels, less than 1.0 between them, and greater than 1.0 outside them
C.Area distortion is strictly zero everywhere across the map graticule
D.Scale factor increases uniformly along all meridians without any lines of true scale
Explanation: The Lambert Conformal Conic (LCC) projection uses a secant cone that intersects the reference ellipsoid at two standard parallels. Along these two standard parallels, the scale factor is true (k = 1.0). Between the standard parallels, the cone cuts inside the ellipsoid, resulting in a scale factor less than 1.0 (compression), while poleward and equatorward beyond the standard parallels, the scale factor exceeds 1.0 (expansion). It is conformal, preserving angles locally.
7During differential leveling for a primary irrigation canal, an instrument takes a backsight over a distance of 1,200 m. Taking the Earth's radius R = 6,371 km and refraction coefficient k = 0.14, what is the combined correction for Earth curvature and atmospheric refraction that must be subtracted from the rod reading?
A.0.032 m
B.0.097 m
C.0.113 m
D.0.226 m
Explanation: The combined curvature and refraction correction is given by c_cr = (1 - k) * d² / (2*R), where d is sight distance and R is Earth's radius. In practical engineering surveying units with d in km (D = 1.2 km): c_cr ≈ 0.0675 * D² = 0.0675 * (1.2)² = 0.0675 * 1.44 = 0.0972 m ≈ 0.097 m. Because curvature makes the rod reading too high while refraction bends the line of sight downward, the net effect makes the observed rod reading 0.097 m too high, requiring a negative correction.
8A leveling project specifies allowable loop misclosure ±6.0√K mm, where K is circuit length in kilometers. A 4.0 km loop closes at +18 mm. How should it be evaluated against this stated project tolerance?
A.Acceptable, because 18 mm is less than the third-order limit of 24 mm
B.Rejected, because the allowable limit is ±12.0 mm, which the observed 18 mm exceeds
C.Acceptable, because allowable misclosure is calculated as ±6.0 * K = ±24.0 mm
D.Rejected, because any closure error exceeding 10 mm is unconditionally unacceptable in engineering geomatics
Explanation: The stated limit is ±6√4 = ±12 mm. The magnitude 18 mm exceeds 12 mm, so the loop fails this project tolerance and requires investigation and reobservation as appropriate. This exercise does not establish a universal survey-order classification.
9An EDM baseline is measured at T = 35°C and P = 920 hPa. Using the supplied correction equation Δd (ppm) = 282.0 - [0.2906 * P / (1 + 0.00366 * T)], what correction should be added to a raw distance of 2,500.000 m?
A.+0.113 m (+45.0 ppm)
B.+0.180 m (+72.0 ppm)
C.-0.088 m (-35.2 ppm)
D.+0.025 m (+10.0 ppm)
Explanation: The denominator is 1.1281 and the pressure term is 267.352/1.1281 = 236.993 ppm. Thus Δd = 45.007 ppm. The distance correction is 2500 × 45.007 × 10^-6 = +0.11252 m, or +0.113 m to the nearest millimeter. The constants supplied in the question determine the answer.
10When balancing a closed polygon traverse, under what surveying condition is the Bowditch (Compass) Rule mathematically justified over the Transit Rule?
A.When angular measurements are substantially more precise than linear distance measurements
B.When linear distance measurements and angular measurements are assumed to have equal relative precision
C.When linear distance measurements are made with sub-millimeter EDM and angles with a low-precision compass
D.When the traverse consists entirely of lines oriented along the cardinal compass directions
Explanation: The Bowditch (Compass) Rule assumes that errors in traversing are accidental and that linear distance measurements and angular measurements have equal relative precision. It distributes corrections to latitude and departure directly in proportion to the length of each traverse course. Conversely, the Transit Rule assumes angular measurements are more precise than linear measurements and distributes corrections proportional to the latitude and departure magnitudes themselves.

About the PEC EPE Geoinformatics Exam

Geoinformatics Engineering is explicitly named in PEC's EPE Guidebook Appendix-A. Its undergraduate curriculum provides authoritative scope for geodesy, surveying, GIS, remote sensing, and related engineering topics. OpenExamPrep provides independent English-language MCQ practice on these topics. A current EPE-specific Geoinformatics syllabus and subdomain weights were not located, so this bank is a topic study resource rather than a claimed blueprint match or full-paper simulation.

Exam sponsor: Pakistan Engineering Council (PEC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

PEC's general structure is Part-I closed-book MCQs, 2 hours; a 90-minute break; Part-II open-book MCQs, 3 hours. Guidebook Appendix-A names one Geoinformatics Engineering Depth area. No additional mandatory EPE assignment, oral, practical, or case-study component is listed in the general instructions.

Time Limit

3 hours (Part-II); 2 hours (Part-I), with a 90-minute break

Passing Score

60% in each part independently

Exam / Certification Fees

Rs. 5,000 new candidate; Rs. 2,500 single-part reappearance, plus bank charges

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

15 of 100 practice items

Geodesy and surveying

Reference systems, projections, leveling, transformations, and accuracy assessment; official EPE weight unconfirmed.

15 of 100 practice items

Cartography and spatial mathematics

Map scales, spatial statistics, interpolation, and geometry; official EPE weight unconfirmed.

25 of 100 practice items

GIS analysis

Spatial data, topology, networks, terrain, and spatial queries.

20 of 100 practice items

Remote sensing

Radiometry, indices, classification, multispectral imagery, and radar.

15 of 100 practice items

GNSS and photogrammetry

Positioning errors, photo geometry, and LiDAR.

10 of 100 practice items

Web GIS and spatial infrastructure

OGC services, spatial databases, metadata, and Pakistan's surveying framework.

Preparing for the PEC EPE Geoinformatics Exam

What You Need to Know

  • Passing score: 60% in each part independently
  • Assessment: PEC's general structure is Part-I closed-book MCQs, 2 hours; a 90-minute break; Part-II open-book MCQs, 3 hours. Guidebook Appendix-A names one Geoinformatics Engineering Depth area. No additional mandatory EPE assignment, oral, practical, or case-study component is listed in the general instructions.
  • Time limit: 3 hours (Part-II); 2 hours (Part-I), with a 90-minute break
  • Exam / certification fees: Rs. 5,000 new candidate; Rs. 2,500 single-part reappearance, plus bank charges Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

PEC EPE Geoinformatics: Suggested Study Strategy

1Ask PEC for the current Geoinformatics EPE syllabus and Depth arrangements.
2Keep coordinate reference systems, map units, and geodetic versus projected distances explicit.
3Distinguish model-fitting residuals, independent positional accuracy, and image resolution.

Frequently Asked Questions

Are these the official EPE topic weights?

No. The section counts describe our practice inventory. PEC's undergraduate curriculum establishes real subject scope; Guidebook Appendix-A lists one Geoinformatics Engineering Depth area. A current EPE-specific subdomain weighting document was not located. Confirm the current detailed outline with PEC before planning preparation.

What is the official assessment language?

The reviewed PEC guide, curriculum, and sample material are in English, but they do not separately confirm assessment-language options. This bank uses English throughout and is independent study material, not an official translation.

What resources are allowed in Part-II?

The general guidelines permit bound textbooks, reference books, and standards. Loose notes, laptops, and prohibited electronic devices are not permitted; follow current PEC candidate instructions.

Does EPE include a surveying practical or oral exam?

The published general EPE assessment consists of two MCQ parts and does not list a separate mandatory practical, oral, assignment, or case-study assessment. Relevant experience and CPD are eligibility requirements, not extra EPE assessment tasks.