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ADX · 22% of the exam

Regulations practice questions

10 free Regulations questions for the Aircraft Dispatcher (ADX) Knowledge Test exam, each with the correct answer and an explanation for every option.

Start the questionsFree 10-question ADX quiz

What this domain covers

The largest domain in our breakdown: the federal rules that govern airline operations and the dispatcher's role, centred on 14 CFR part 121 with supporting material from parts 1, 25, 65, 91 and 117, NTSB part 830 and security and hazardous materials rules.

Exam weight
22%
On a real exam
≈ 18 questions
In our bank
132 questions

Topics that come up most

  • Operational control and dispatcher duties under part 121
  • Dispatch and flight release requirements
  • Fuel and alternate airport rules for domestic and flag operations
  • Flight crew duty and rest limits
  • Accident and incident reporting under NTSB part 830

How to study it

Make a table of the part 121 fuel, alternate and release rules with domestic and flag operations side by side; many questions turn on which kind of operation the flight is.

Sample Regulations questions

Try each one before opening the answer. Original questions written to the official exam objectives.

  1. Question 1

    Under 14 CFR 121.329, above what cabin altitude must oxygen be available for every passenger?

    • A8,000 feet
    • B15,000 feet
    • C25,000 feet
    • D5,000 feet
    Show answer and explanation

    Answer: B) 15,000 feet

    • AIncorrect. That's a typical cabin altitude.
    • BCorrect. Lower cabin altitudes have partial requirements.
    • CIncorrect. The threshold is lower.
    • DIncorrect. The threshold is higher.

  2. Question 2

    Under 14 CFR 121.631, which statement correctly describes changing the original destination or alternate airport in a dispatch or flight release while the aircraft is en route?

    • AEither may be changed if the new airport is authorized for the aircraft type and dispatch requirements are met when amended
    • BOnly the alternate may be changed, and the new alternate must be within fuel range and meet alternate weather minimums
    • CEither may be changed if the new airport is authorized for the aircraft type, with weather and fuel judged as of original dispatch
    • DEither may be changed only after the aircraft lands at an intermediate airport and is dispatched again from that airport
    Show answer and explanation

    Answer: A) Either may be changed if the new airport is authorized for the aircraft type and dispatch requirements are met when amended

    14 CFR 121.631(f) allows the original destination or alternate to be changed en route. The new airport must be authorized for the aircraft type, and the applicable dispatch requirements must be met at the time of the amendment.

    • ACorrect. 121.631(f) allows an original destination or alternate to be changed en route if the other airport is authorized for that type of aircraft. The appropriate requirements of 121.593 through 121.661 and 121.173 must be met at the time of redispatch or amendment.
    • BIncorrect. 121.631(b) does let alternates within fuel range be added en route. However, 121.631(f) also allows the original destination to be changed, not just the alternate.
    • CIncorrect. Under 121.631(f), the applicable requirements must be met at the time of the redispatch or amendment, not at the time of the original dispatch.
    • DIncorrect. 121.631 specifically allows en route amendment of the release, including changing the destination or alternate under 121.631(f). A landing is not required first. Each en route amendment must be recorded under 121.631(g).

  3. Question 3

    Under 14 CFR 121.545, which person may be allowed to manipulate the controls of a Part 121 airplane during flight?

    • AA pilot of another certificate holder who has PIC permission, is qualified in the airplane, and is authorized by the operating certificate holder
    • BA commercial pilot traveling as a passenger who holds a type rating in the airplane and has the PIC's permission
    • CAn FAA aviation safety inspector who is not a pilot, as long as the PIC approves and is monitoring the controls
    • DA company dispatcher on an observation flight, if the PIC gives permission and the autopilot stays engaged
    Show answer and explanation

    Answer: A) A pilot of another certificate holder who has PIC permission, is qualified in the airplane, and is authorized by the operating certificate holder

    14 CFR 121.545 allows only three groups to manipulate the controls in flight: qualified pilots of the operating certificate holder, authorized FAA or NTSB pilot safety representatives who meet the stated conditions, and authorized, qualified pilots of another certificate holder who have PIC permission.

    • ACorrect. 121.545(c) allows a pilot of another certificate holder to manipulate the controls if the PIC gives permission, the pilot is qualified in the aircraft, and the operating certificate holder has authorized it.
    • BIncorrect. A type rating and PIC permission are not enough. The person must fall into one of the categories listed in 121.545: a qualified pilot of the operating certificate holder, an authorized FAA or NTSB pilot safety representative, or an authorized pilot of another certificate holder.
    • CIncorrect. 121.545(b) covers only an authorized pilot safety representative of the Administrator or the NTSB who is qualified in the aircraft and is checking flight operations. An inspector who is not a pilot does not qualify.
    • DIncorrect. Dispatchers are not among the persons 121.545 permits to manipulate the controls, and an engaged autopilot does not create an exception.

  4. Question 4

    14 CFR Part 139 governs the:

    • ALicensing of dispatchers
    • BCertification of airports
    • COperation of small drones
    • DDesign of transport airplanes
    Show answer and explanation

    Answer: B) Certification of airports

    • AIncorrect. That's Part 65.
    • BCorrect. Serving air carrier operations.
    • CIncorrect. That's Part 107.
    • DIncorrect. That's Part 25.

  5. Question 5

    A takeoff alternate must be within one hour at one-engine-inoperative cruise speed for a:

    • ATwo-engine airplane
    • BFour-engine airplane
    • CSingle-engine airplane
    • DThree-engine airplane
    Show answer and explanation

    Answer: A) Two-engine airplane

    • ACorrect. Two hours for three or more engines (121.617).
    • BIncorrect. That's two hours.
    • CIncorrect. Not used in Part 121 jet ops.
    • DIncorrect. That's two hours.

  6. Question 6

    When applying for the certificate, the dispatcher knowledge test must normally have been passed within the preceding:

    • A60 calendar months
    • B12 calendar months
    • C24 calendar months
    • D6 calendar months
    Show answer and explanation

    Answer: C) 24 calendar months

    • AIncorrect. It's 24 calendar months.
    • BIncorrect. It's 24 calendar months.
    • CCorrect. 14 CFR 65.55(b).
    • DIncorrect. It's 24 calendar months.

  7. Question 7

    What does "substantial damage" under NTSB 830 exclude?

    • ADamage that requires major repair of a structural part
    • BAny damage that affects structural strength
    • CDamage limited to one engine
    • DDamage that adversely affects performance
    Show answer and explanation

    Answer: C) Damage limited to one engine

    • AIncorrect. That is substantial damage.
    • BIncorrect. That is substantial damage.
    • CCorrect. Bent fairings, small dents and tire damage are also excluded.
    • DIncorrect. That is substantial damage.

  8. Question 8

    Under 14 CFR 121.533, a domestic aircraft dispatcher must cancel or redispatch a flight when:

    • AATC assigns a cruise altitude different from the one filed
    • BIn the dispatcher's or PIC's opinion, it cannot operate safely as planned or released
    • CThe PIC formally requests cancellation; the dispatcher's own opinion is not sufficient
    • DIts estimated arrival is later than the scheduled time shown on the release
    Show answer and explanation

    Answer: B) In the dispatcher's or PIC's opinion, it cannot operate safely as planned or released

    14 CFR 121.533(c) requires the dispatcher to cancel or redispatch a flight that, in the dispatcher's or the PIC's opinion, cannot operate or continue to operate safely as planned or released.

    • AIncorrect. An ATC altitude change alone does not trigger cancellation or redispatch. The test in 121.533 is whether the flight can operate safely as planned or released.
    • BCorrect. 121.533(c) makes the dispatcher responsible for cancelling or redispatching a flight if, in the dispatcher's or the PIC's opinion, it cannot operate or continue to operate safely as planned or released.
    • CIncorrect. Either the dispatcher's opinion or the PIC's opinion is enough. The dispatcher does not need a request from the PIC.
    • DIncorrect. A late arrival is a schedule issue. The regulatory trigger is safety, not timeliness.

  9. Question 9

    A Part 121 pilot in command must hold:

    • AA commercial certificate only
    • BAn ATP certificate
    • CA flight instructor certificate
    • DA dispatcher certificate
    Show answer and explanation

    Answer: B) An ATP certificate

    • AIncorrect. An ATP is required.
    • BCorrect. With the aircraft type rating.
    • CIncorrect. An ATP is required.
    • DIncorrect. An ATP is required.

  10. Question 10

    An aircraft dispatcher certificate remains valid:

    • AFor 12 calendar months
    • BFor 24 calendar months
    • CUntil surrendered, suspended or revoked
    • DOnly while holding a current medical certificate
    Show answer and explanation

    Answer: C) Until surrendered, suspended or revoked

    • AIncorrect. It doesn't expire.
    • BIncorrect. It doesn't expire.
    • CCorrect. It doesn't expire on a date.
    • DIncorrect. No medical is required.

Regulations: FAQs

How much of the ADX exam is Regulations?

Regulations is 22% of the ADX exam by the official exam guide's weighting, which on a 80-question form works out to roughly 18 questions. The real exam's exact split varies by form.

What does the Regulations domain cover?

The largest domain in our breakdown: the federal rules that govern airline operations and the dispatcher's role, centred on 14 CFR part 121 with supporting material from parts 1, 25, 65, 91 and 117, NTSB part 830 and security and hazardous materials rules.

How should I study Regulations for ADX?

Make a table of the part 121 fuel, alternate and release rules with domestic and flag operations side by side; many questions turn on which kind of operation the flight is.

Where can I practise more Regulations questions?

This page has 10 free Regulations questions with answers. The ExamWize ADX question bank has 132 questions in this domain. Every practice exam result breaks your score down by domain, and Review Mode re-drills the questions you missed.

Other ADX topics

Also: 15 free questions across all topics, the ADX cheat sheet and the study guide.

Get Regulations exam-ready

The full ADX bank has 132 Regulations questions. Timed practice exams match the real exam's length and domain weights, every result shows your score per domain, and Review Mode re-drills the questions you missed.

See the full ADX practice examsTake the free diagnostic

Not affiliated with FAA; questions are original, written from the official exam outline, and never copied from the real exam.