Geodesy MCQ Set-1 [Free PDF] Objective Questions

50+ MCQs on Geodesy

In this blog, we’ve curated 50+ thought-provoking multiple-choice questions covering the fundamental and advanced concepts of geodesy. ‘Geodesy MCQ Set-1 [Free PDF] Objective Questions’ is designed to help you refresh your basics, challenge your knowledge, and gain practical insights into the science of Earth’s shape, size, and gravitational field.

Whether you’re a geodesy enthusiast, a GIS student, or a professional in the field, this quiz is the perfect way to enhance your expertise and understanding of geodetic principles.

Let’s dive into the ‘Geodesy MCQ Set-1 [Free PDF] Objective Questions’ and start exploring!

1. What does GDBMS stand for in the context of data management?

A. General Database Management System

B. Geographic Data Backup Management System

C. Geographic Database Management System

D. Global Data Base Management System

C. Geographic Database Management System

2. What type of survey was conducted by the Survey Department in collaboration with the National Space Institute of Denmark?

A. Ground-based Gravity Survey

B. Satellite Gravity Survey

C. Hydrographic Survey

D. Airborne Gravity Survey

3. What is the purpose of the GPS Control Point Network established in Nepal?

A. To monitor weather patterns across the country

B. To provide internet connectivity in remote areas

C. To enhance tourism by mapping historical sites

D. To provide precise coordinates for mapping

4. Which method is used for leveling in the Levelling Section?

A. Differential Levelling Method

B. Barometric Levelling Method

C. Spirit Levelling Method

D. GPS Levelling Method

C. Spirit Levelling Method

5. What is the primary purpose of the Geodetic Survey Branch?

A. To conduct environmental impact assessments for land use

B. To manage land ownership disputes and cadastral mapping

C. To conduct systematic mapping and establish control points

D. To provide training and education in surveying techniques

C. To conduct systematic mapping and establish control points

6. Which branch was established for controlled cadastral mapping?

A. Cadastral Survey Branch

B. Topographical Survey Branch

C. Trigonometrical Survey Branch

D. Geodetic Survey Branch

C. Trigonometrical Survey Branch

7. What technology is used for the re-observation of First Order Points?

A. GPS

B. Doppler Positioning technique

C. Traditional methods (Triangulation, Traverse, Trilateration)

D. GDBMS (data entry into digital form)

A. GPS

8. What year was the Survey Department established in Nepal?

A. 1957 AD

B. 1950 AD

C. 1955 AD

D. 1960 AD

A. 1957 AD

9. What does the Gravity Section aim to determine regarding the value of acceleration due to gravity (g)?

A. To determine variations in acceleration due to gravity (g)

B. To measure temperature variations across regions

C. To determine geological composition of the crust

D. To assess gravity’s impact on local wildlife

A. To determine variations in acceleration due to gravity (g)

10. What is the role of the Doppler Positioning technique in mapping?

A. To convert analog data into digital format for mapping purposes

B. To establish a network of control points for triangulation

C. To enhance the accuracy of positioning data

D. To assist in the re-observation of existing mapping points

C. To enhance the accuracy of positioning data

11. What is the role of Nagarkot Observatory in geodetic research activities?

A. It serves as a tourist attraction for astronomical observations

B. It provides educational programs for local schools about astronomy

C. It focuses solely on meteorological data collection and analysis

D. It collects and processes GPS data for geodetic research

12. What activities are included in the establishment and maintenance of the level network along national highways?

A. Establishment and maintenance of Bench Marks

B. Maintenance of GPS tracking stations and revenue generation from processed data

C. Regular observation for research activities on archaeological sites and infrastructure

D. Establishment of control points and data archiving for cadastral mapping

A. Establishment and maintenance of Bench Marks

13. What is the main focus of the Astronomical Survey Section at Nagarkot?

A. Determining the position of stars using telescopes

B. Geodetic research and data acquisition

C. Revenue generation through GPS data processing

D. Establishing a reference station for GPS users

B. Geodetic research and data acquisition

14. What equipment was used during the Airborne Gravity Survey?

A. Beechcraft 200

B. LaCoste & Romberg gravimeter S-38

C. Bell 206 helicopter

D. Cessna 172 aircraft

A. Beechcraft 200

15. What is the significance of the Bench Mark (BM) at Birgunj in Nepal?

A. The BM at Birgunj is a fundamental point for leveling in Nepal.

B. The BM at Birgunj is utilized for urban planning and development projects.

C. The BM at Birgunj is primarily used for geological surveys in Nepal.

D. The BM at Birgunj serves as a reference for agricultural land measurements.

A. The BM at Birgunj is a fundamental point for leveling in Nepal.

16. What is the relationship between the undulated terrain of Nepal and the variations in gravity measurements?

A. The terrain has no effect on gravity measurements.

B. Gravity measurements are uniform across all regions of Nepal.

C. Variations in gravity are solely due to atmospheric conditions.

D. The undulated terrain causes variations in gravity measurements.

17.What is the reference spheroid used in Nepal's geodetic system?

A. WGS 84 (World Geodetic System 1984)

B. GRS 80 (Geodetic Reference System 1980)

C. Clarke 1866 (an older reference spheroid)

D. Everest (1830)

18. What is the expected outcome of determining the geoid model for Nepal?

A. Improved mapping of geological features in Nepal

B. Enhanced prediction of weather patterns in the region

C. Development of new transportation routes based on gravity data

D. Improved accuracy in height measurements

19. How many satellites are currently in operation within the GPS constellation?

A. 20 satellites

B. 25 satellites

C. 24 satellites

D. 30 satellites

C. 24 satellites

20. What is the primary function of the Global Positioning System (GPS)?

A. To determine precise positions

B. To track wildlife migration patterns

C. To facilitate communication between devices

D. To provide weather forecasts and updates

A. To determine precise positions

21. What is the primary purpose of using carrier phase observations in GPS?

A. To achieve high precision in relative positioning

B. To reduce the time required for GPS signal acquisition

C. To determine the absolute position of a single GPS receiver

D. To improve the accuracy of satellite clock synchronization

A. To achieve high precision in relative positioning

22. What is the typical range limitation of a standard DGPS system?

A. 50 kilometers

B. 100 kilometers

C. 10-20 kilometers

D. Few kilometers

23. What transformation is necessary to convert GPS coordinates from WGS84 to a local datum?

A. A simple translation of coordinates

B. A transformation involving seven parameters

C. A transformation that requires only latitude and longitude adjustments

D. A conversion that only adjusts for scale differences

B. A transformation involving seven parameters

24. What does the term "selective availability" refer to in the context of GPS?

A. The intentional degradation of GPS signal accuracy

B. The restriction of GPS access to military users only

C. The enhancement of GPS accuracy through additional satellites

D. The intentional improvement of GPS signal strength for better reception

A. The intentional degradation of GPS signal accuracy

25. Which segment of the GPS system is responsible for processing satellite data and generating navigation messages?

A. User Segment (receives navigation signals)

B. Space Segment (contains satellites)

C. Master Control Station (part of Control Segment)

D. Control Segment

26. What are the two frequency bands used by GPS satellites to transmit signals?

A. L0 and L1

B. L3 and L4

C. L1 and L2

D. L1 and L5

C. L1 and L2

27. What is the estimated precision of height determination using GPS compared to horizontal components?

A. Height determination using GPS is twice as precise as horizontal components

B. 1.5 times the precision of horizontal components

C. Height determination using GPS is less precise than horizontal components

D. Height determination using GPS is equal to horizontal precision

B. 1.5 times the precision of horizontal components

28. What type of GPS receiver is typically used for high-precision geodetic applications?

A. Navigation receivers

B. Kinematic GPS receivers

C. Geodetic receivers

D. Surveying receivers

C. Geodetic receivers

29. Which technique improves positioning accuracy by minimizing errors from clock discrepancies?

A. Carrier Phase Observations

B. Relative Positioning

C. Dual Frequency Observations

D. Differential GPS (DGPS)

30. In Kinematic GPS, what type of movement is one of the receivers undergoing?

A. The receiver is in relative motion

B. The receiver is stationary on a fixed point

C. The receiver is moving in a circular path

D. The receiver is oscillating back and forth

A. The receiver is in relative motion

31. What are the two types of coordinates that GPS observations can provide?

A. Cartesian coordinates and velocity vectors

B. Geodetic coordinates and grid coordinates

C. Geodetic coordinates and Cartesian coordinates

D. Latitude and longitude only

C. Geodetic coordinates and Cartesian coordinates

32. In which year did the GPS system become fully operational for commercial users?

A. 1995 AD

B. 1994 AD

C. 1992 AD

D. 1990 AD

A. 1995 AD

33. What is the main advantage of dual-frequency observations in GPS technology?

A. It enhances the speed of signal transmission

B. It eliminates ionospheric effects

C. It increases the number of satellites that can be used for positioning

D. It allows for real-time tracking of moving objects

B. It eliminates ionospheric effects

34. What is the main advantage of using GPS over traditional terrestrial surveying methods?

A. GPS offers higher accuracy and speed

B. GPS is less expensive to implement than traditional surveying equipment

C. GPS requires fewer personnel for surveying tasks compared to traditional methods

D. GPS provides real-time data for immediate analysis and decision-making

A. GPS offers higher accuracy and speed

35. Which organization in India is involved in GPS-related activities for various applications?

A. Geological Survey of India

B. Survey of India

C. Indian Meteorological Department

D. Indian Space Research Organisation

B. Survey of India

36. What application involves monitoring crustal movements and earthquake prediction using GPS?

A. Vertical Control Network

B. Marine Geodesy

C. Survey control for topographical surveys

D. Earthquake monitoring

37. What type of positioning does the absolute positioning method in GPS provide?

A. Three-dimensional positioning

B. Real-time positioning with immediate feedback

C. Two-dimensional positioning in a plane

D. Relative positioning using multiple receivers

A. Three-dimensional positioning

38. How do GPS heights relate to Mean Sea Level (MSL) heights?

A. GPS heights are always equal to MSL heights

B. MSL heights are derived from GPS heights without any corrections

C. MSL heights are derived from GPS heights by subtracting geoidal undulation

D. GPS heights are lower than MSL heights by a fixed amount

C. MSL heights are derived from GPS heights by subtracting geoidal undulation

39. What is the significance of the NAVSTAR GPS system developed by the U.S. Department of Defense?

A. It provides high-accuracy global positioning

B. It requires clear weather to function properly

C. It only provides 2-D positioning for navigation

D. It is limited to military applications only

A. It provides high-accuracy global positioning

40. What is the role of the User Segment in the GPS system?

A. To control satellite orbits and maintain their positions

B. To transmit navigation signals to the satellites

C. To receive signals and compute user position

D. To monitor satellite health and performance

C. To receive signals and compute user position

41. What is the significance of using multiple GNSS constellations for users?

A. Increased cost of GNSS equipment due to multiple systems

B. Limited satellite availability in certain regions

C. Reduced accuracy in positioning due to signal interference

D. Redundancy and availability for users

42. What is the role of pseudorandom codes in GNSS signals?

A. To encrypt the signals for military use

B. To increase the bandwidth of the signals transmitted

C. To provide a unique identifier for each satellite

D. To enable signal identification and correlation

43. What is the semi-major axis value of the WGS84 ellipsoid?

A. 6,378,000 m

B. 6,400,000 m

C. 6,378,137 m

D. 6,371,000 m

C. 6,378,137 m

44. What was introduced in 1972 to provide a compromise time scale adapted to Earth rotation?

A. Universal Time Coordinated (UTC)

B. Ephemeris Time

C. Dynamical Time (TDT)

D. Atomic Time (TAI)

A. Universal Time Coordinated (UTC)

45. What is the main function of the navigation message transmitted by GPS satellites?

A. To transmit voice communication between satellites and receivers

B. To provide entertainment data for users

C. To send weather updates to users

D. To provide position, velocity, and time information

46. What happens to the GPS signal upon surface reflection?

A. The GPS signal becomes stronger and more accurate after reflection.

B. The GPS signal is delayed and may interfere with the direct signal.

C. The GPS signal is distorted but remains unaffected by reflections.

D. The GPS signal is completely absorbed by surfaces and does not reflect.

B. The GPS signal is delayed and may interfere with the direct signal.

47. What is the chipping rate of the Coarse Acquisition (C/A) code?

A. 1.023 Mbps

B. 2.046 MHz

C. 10.23 Mbps

D. 1.023 MHz

48. How often can the integer number n, which adjusts UTC, be changed?

A. Every leap year on February 29

B. Once a year on January 1

C. Every month on the first day

D. Twice a year

49. What is the primary reason for converting geocentric coordinates to geodetic coordinates?

A. To convert large values into smaller ones

B. To simplify calculations for satellite positioning

C. To make reported positions more meaningful

D. To ensure compatibility with local datums