Ranked by question count weighted against the spec's own difficulty rating — not question count alone, since a smaller topic rated harder can be worth more study time than a bigger, easier one.
1Retaining Structures (ASD or LRFD)10–15q
Lateral earth pressure and load distribution · Rigid retaining wall analysis · Cantilevered, anchored, and braced retaining wall analysis · Cofferdams
2Deep Foundations (ASD or LRFD)10–15q
Geotechnical and structural capacity and settlement of deep foundations · Lateral capacity and deformation of deep foundations · Installation methods · Static and dynamic load testing
3Earth Structures, Ground Improvement, and Pavement9–14q
Ground improvement · Geosynthetic applications · Slope stability evaluation and slope stabilization · Embankments, earth dams, and levees