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GK · Air Brakes · Combination · Sprint 4CDL Study Guide — Class A Core Scaffold
National Class A knowledge hub stub. Cover ELDT (49 CFR 380 Subpart F), pass line 80% (49 CFR 383.135), and FMCSA + state CDL manual intent. Do not stub 50 state pages or endorsement Wave 2 here.
Planned chapters
Vehicle inspection & controls, safe driving, air brake systems, coupling/uncoupling, combination handling, cargo basics (GK scope), and how state manuals map to 49 CFR 383/392/393.
Out of scope this wave
HazMat, Tanker, Passenger, School Bus, Doubles/Triples endorsements and per-state landing pages — schedule for Wave 2 after Class A core ranks.
Official sources
Independent study aid. Not affiliated with FMCSA or any state DMV.