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04-Geol-B10: May 2016

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Physical Properties in Gravity and Magnetic Methods
  2. Question 2 Potential Fields — Monopole and Dipole Sources
  3. Question 3 Planning and Executing a Ground Magnetic Survey
  4. Question 4 The Zero-Length-Spring Gravimeter — Principle, Reading, Drift and Calibration
  5. Question 5 Magnetometer Principles and Magnetic Gradiometry
  6. Question 6 Inclination/Declination Effects on Magnetic Anomalies
  7. Question 7 Enhancement and Display of Gridded Geophysical Data
  8. Question 8 Procedure for Interpreting a Large Region Using Gravity and Magnetic Data
  9. Question 9 The Fourier Transform in Gravity and Magnetic Processing
  10. Question 10 Forward versus Inverse Modelling of Potential-Field Data

Start with Question 1 →

EGBC National Exam — Geological Engineering, 04-Geol-B10-1 Gravity and Magnetic Fields, 2016-May. Closed book; no calculator permitted. All ten questions require an answer in essay format, with diagrams used wherever appropriate. The exam instructs "choose six (6) of the following ten (10) questions, the first six as they appear in the answer book will be marked, each of equal value".

Reference texts: Telford, Geldart & Sheriff, Applied Geophysics, 2nd ed. (physical properties ch.2 & 5; gravimeters and gravity reduction ch.2; magnetometers and magnetic surveying ch.4–5; forward/inverse modelling throughout); Kearey, Brooks & Hill, An Introduction to Geophysical Exploration, 3rd ed. (survey design, data processing and interpretation workflow ch.6 & 7); Blakely, Potential Theory in Gravity and Magnetic Applications (potential-field theory, Fourier-domain filters, reduction-to-pole ch.2, 9 & 12).