Aircraft Dispatcher Practice Test: FAA ADX Knowledge Test

592 practice questions on the dispatcher certificate and duty limits, operational control and the release, alternates and weather minimums, fuel, weather hazards, emergencies and NTSB reporting, takeoff performance charts, approach plates and airport diagrams, weight and balance, en route charts, takeoff minimums and departure procedures, Chart Supplement entries, arrivals, helicopter weight and balance, weather charts, drift-down and fuel dump, airport signs and markings, helicopter hover ceilings, and HSI displays. We wrote every question from the regulations, the FAA's Aviation Weather Handbook and the real figures in the FAA's ADX testing supplement, and each answer links the exact section, page or figure it comes from. The real ADX test is 80 questions at 70%, three choices each, like these.

The real test: 80 questions in 210 minutes. 56 right (70%) passes.

Here: 592 questions. Our own practice questions, written from 14 CFR, 49 CFR part 830 and the FAA Aviation Weather Handbook (FAA-H-8083-28B), U.S. government works. Not the FAA's test questions. Free.

What's on the test

10 sample questions

1. How old must you be to take the aircraft dispatcher knowledge test?

   • A.21
   • B.18
   • C.23
   Show answer

   A. 21

   ADX-1 · The dispatcher certificate and duty limits · 14 CFR 65.53

2. In domestic operations, who is jointly responsible for preflight planning, delay and dispatch release?

   • A.The dispatcher and the director of operations
   • B.The pilot in command alone
   • C.The pilot in command and the aircraft dispatcher
   Show answer

   C. The pilot in command and the aircraft dispatcher

   ADX-16 · Operational control and the release · 14 CFR 121.533

3. Departure weather is below the carrier's landing minimums. A twin-engine airplane needs a takeoff alternate within:

   • A.1 hour at one-engine-inoperative cruise speed in still air
   • B.2 hours at normal cruise
   • C.30 minutes at one-engine-inoperative speed in still air, measured from the departure runway
   Show answer

   A. 1 hour at one-engine-inoperative cruise speed in still air

   ADX-36 · Alternates and weather minimums · 14 CFR 121.617

4. Domestic fuel: after the destination and the most distant alternate, how much reserve is required?

   • A.10 percent of trip time
   • B.30 minutes at holding speed, measured at 1,500 feet above the alternate airport
   • C.45 minutes at normal cruising fuel consumption
   Show answer

   C. 45 minutes at normal cruising fuel consumption

   ADX-51 · Fuel · 14 CFR 121.639

5. What three ingredients does a thunderstorm cell need?

   • A.Wind shear, cold air, and a jet stream
   • B.Sufficient water vapor, unstable air
   • C.Dry air, sunshine, and mountains
   Show answer

   B. Sufficient water vapor, unstable air

   ADX-62 · Weather hazards · Aviation Weather Handbook, PDF p. 257

6. A domestic dispatcher learns of an emergency in flight. First action?

   • A.Declare an emergency with ATC immediately
   • B.Call the FAA
   • C.Advise the PIC, learn the PIC's decision
   Show answer

   C. Advise the PIC, learn the PIC's decision

   ADX-99 · Emergencies, NTSB, MEL and speeds · 14 CFR 121.557

7. How old must you be to hold an aircraft dispatcher certificate?

   • A.21
   • B.23
   • C.25
   Show answer

   B. 23

   ADX-2 · The dispatcher certificate and duty limits · 14 CFR 65.53

8. Which is a domestic dispatcher's responsibility once the flight is under way?

   • A.Approving the aircraft for return to service
   • B.Commanding the crew
   • C.Monitoring the progress of each flight
   Show answer

   C. Monitoring the progress of each flight

   ADX-17 · Operational control and the release · 14 CFR 121.533

9. For a three-engine airplane, a takeoff alternate must be within:

   • A.2 hours at one-engine-inoperative cruise speed in still air
   • B.3 hours at normal cruise speed in still air, the same limit that applies to twin-engine airplanes
   • C.1 hour
   Show answer

   A. 2 hours at one-engine-inoperative cruise speed in still air

   ADX-37 · Alternates and weather minimums · 14 CFR 121.617

10. Domestic fuel: alternate fuel is figured to which alternate?

    • A.The average of the alternates
    • B.The most distant alternate
    • C.The closest alternate
    Show answer

    B. The most distant alternate

    ADX-52 · Fuel · 14 CFR 121.639

What the study guide does

• Short study rounds and flip cards.
• A practice test built like the real one: 80 questions, 56 to pass.
• Pass Meter: your chance of passing if you sat the test today, worked out from your own answers.
• An explanation for every answer.