Ground school · Lesson 8 of 8
Exam Day and the Under-Taught Topics
Area I · Regulations · 3 min read
ACS UA.I.C, UA.I.E · 14 CFR 107.7 · 14 CFR 107.39 · 14 CFR 107.57
The topics test-takers keep reporting from real exams that standard study guides skip, plus the mechanics of the test itself.
The mechanics
- 60 questions, three choices each (A/B/C), 2 hours, 70% to pass, $175 at a PSI center. Basic calculator allowed; the testing supplement (FAA-CT-8080-2H) with all figures and the chart legend is handed to you.
- Every candidate gets a different question form. Some forms run harder.
- FAA's study-time guidance: 15–20 hours. Don't book the test date until practice scores say you're ready - a deadline before competence just adds stress.
- Missed questions print as ACS codes (UA.I.B.K21b-style) on your test report. Match them to the ACS document to target a retake or the recurrent training. (LegalToFly's whole reporting model is built on these codes.)
Test-taking tactics worth stealing
- Reframe the question before touching the answers. Reword the FAA's formal phrasing into plain language, decide what's being asked, THEN look at choices. On chart questions: solve first, then find your answer in the list.
- Distractor anatomy: typically one absurd choice, one plausible trap, one correct. The correct answer is often positioned so you read the traps first.
- When two answers both seem right, pick the most complete/closest one - the exam asks for the best answer, not a perfect one.
- Chart-figure questions eat clock. Bank the fast questions first.
Manned-aircraft flight controls (yes, it's on the drone exam)
Three axes intersect at the center of gravity. The pairs to memorize cold:
| Surface | Motion | Axis |
|---|---|---|
| Ailerons (wings) | Roll | Longitudinal |
| Elevator (tail) | Pitch | Lateral |
| Rudder (tail fin) | Yaw | Vertical |
Operations over people (§107.39 categories)
- Category 1: ≤ 0.55 lb (250 g), no exposed rotating parts (prop guards), Remote ID compliant.
- Category 2: < 55 lb, impact below 11 ft-lb of kinetic energy, no exposed rotating parts, manufacturer Means of Compliance + Declaration of Compliance filed with the FAA.
- Category 3: same as 2 but 25 ft-lb, with tighter operational limits (closed/restricted-access sites, or people under cover / not gathered).
- Category 4: the only category requiring an FAA airworthiness certificate. That question appears verbatim.
- Sustained flight (hovering) over open-air assemblies is the restricted concept - transit is treated differently from loitering.
- Intuition for the energy limits: 11 ft-lb is roughly a baseball arriving at a firm toss - it hurts, it doesn't hospitalize. 25 ft-lb is the same ball thrown hard. The category limits are set where impacts stop being bruises.
✋ Try it
60.2 ft·lb → Over Category 3 — past 25 ft·lb — needs Category 4 (airworthiness certificate) or a waiver
KE = ½ × mass × velocity². Notice how speed dominates: doubling weight doubles the energy, doubling speed quadruples it. That is why the categories are energy caps, not weight caps.
Set a weight and an impact speed and see which category the kinetic energy lands in. Watch what speed does versus weight.
✈ Quick check
Which category of operations over people requires an FAA airworthiness certificate?
Drugs, alcohol, and the FAA
- Conviction (federal OR state) for growing/possessing/selling/transporting marijuana or other controlled substances → certificate application denied for one year from the conviction date ("never" and "18 months" are the distractors).
- Operating while using marijuana → immediate suspension/revocation action.
- Medical marijuana: federally, marijuana is still a controlled substance, and the FAA recognizes no medical exemption. State cards don't matter to §107.57.
✈ Quick check
A state court convicts an applicant of selling marijuana. Their remote pilot application is…
FAA inspection
"On FAA request, the remote PIC must..." → make the sUAS available for inspection or testing, and produce the required documents (certificate, registration). "Refuse without a warrant" is the bait choice.
Part 107 applicability sorting
- 0.5-lb toy flown for fun → recreational (49 USC 44809), not Part 107.
- 12-lb drone shooting real-estate footage for pay → Part 107.
- 45-lb agricultural sprayer → Part 137 (chemical dispensing), regardless of weight.
After you pass
Recurrent training every 24 calendar months (free, online). Address change: notify the FAA within 30 days. Keep the certificate on you when flying.
Done reading?
The read only sticks once you use it. Drill Area I while it is fresh.