ADX - Aircraft Dispatcher Exam — Questions and Answers

Question 1: A dispatcher observes on ACARS that a flight's fuel remaining is significantly below the planned figure. What is the immediate action?

Notify the company fuel department only
Contact the crew to verify fuel status, determine cause, and jointly evaluate diversion options if needed (Correct answer)
Automatically file a minimum fuel declaration with ATC on the crew's behalf
Log the discrepancy and review it post-flight

Correct answer: Contact the crew to verify fuel status, determine cause, and jointly evaluate diversion options if needed

The dispatcher must immediately verify the fuel anomaly with the crew and jointly assess whether a precautionary or emergency landing is required.

Question 2: Under 14 CFR 121.687, what must be included on a domestic dispatch release?

ATC clearance details and transponder code
Identification of the flight, aircraft, route, alternate airports, and minimum fuel (Correct answer)
Passenger names and seat assignments
Only the departure and destination airports

Correct answer: Identification of the flight, aircraft, route, alternate airports, and minimum fuel

14 CFR 121.687 specifies that a domestic dispatch release must identify the flight, aircraft, route, alternate airports, and minimum fuel supply.

Question 3: In the case of unexpected weather changes during a flight, what is the dispatcher’s responsibility?

To update the flight plan with alternative routing or landing options (Correct answer)
To instruct the pilot to return to the airport
To ensure that the aircraft does not exceed its maximum weigh
To keep the passengers informed of delays

Correct answer: To update the flight plan with alternative routing or landing options

Aircraft dispatchers share operational control with the pilot and are responsible for monitoring flight progress and conditions. In the event of unexpected weather changes, their crucial role is to analyze the situation, communicate with the flight crew, and propose safe and efficient alternative routing or landing options to ensure the flight's continuation or a safe diversion.

Question 4: What is the significance of the term 'ATIS' in pre-departure dispatcher-to-crew communications?

Automated Terminal Information Service; dispatchers reference current ATIS information when briefing crews on destination conditions (Correct answer)
Advanced Turbulence Indication System; a weather tool used by dispatchers for route planning
Aircraft Technical Inspection Summary; provided by maintenance to dispatch before release
Air Traffic Instruction System; used to log ATC clearances received by dispatch

Correct answer: Automated Terminal Information Service; dispatchers reference current ATIS information when briefing crews on destination conditions

ATIS is the recorded broadcast of current airport weather and NOTAMs; dispatchers reference it to ensure crews have the latest conditions for departure and arrival airports.

Question 5: What is the purpose of the North Atlantic Track System (NAT HLA) in dispatcher route planning for transatlantic flights?

To provide fixed airways across the Atlantic that never change
To restrict transatlantic flights to a single corridor for radar coverage
To assign specific altitudes to each airline based on their operations specifications
To organize traffic flow across the Atlantic into organized tracks that take advantage of favorable winds, updated daily based on weather (Correct answer)

Correct answer: To organize traffic flow across the Atlantic into organized tracks that take advantage of favorable winds, updated daily based on weather

The NAT track system provides dynamically adjusted organized tracks to exploit the jet stream and manage transatlantic traffic separation, with new tracks published each day.

Question 6: A Part 121 dispatcher is planning a flight to an airport below minimums. Under what condition may this flight legally depart?

If the captain personally approves the dispatch release
If a suitable alternate is filed and the destination is expected to be above minimums at ETA (Correct answer)
It may never depart if destination is currently below minimums
Only if the destination is forecast to be above minimums at the time of departure

Correct answer: If a suitable alternate is filed and the destination is expected to be above minimums at ETA

A flight may depart to a destination that is currently below minimums provided a proper alternate is filed and conditions are forecast to improve by ETA.

Question 7: A dispatcher is planning a transoceanic flight and must identify an Equal Time Point (ETP). The ETP is best described as:

The midpoint between departure and destination by distance
The point where fuel aboard equals the alternate reserve requirement
The geographic halfway point of the oceanic track
The point along the route where the flight time to two diversion airports is equal (Correct answer)

Correct answer: The point along the route where the flight time to two diversion airports is equal

The ETP (Equal Time Point) is where it takes the same time to divert to either of two airports, helping determine the best diversion option.

Question 8: How does a tailwind component affect total fuel burn for a flight?

It has no effect on fuel burn since engines burn fuel based on airspeed, not ground speed
It increases fuel burn because the engines must compensate for the additional air push
It reduces fuel burn because the aircraft covers the ground distance in less time at the same airspeed (Correct answer)
It improves fuel burn only during the descent phase of the flight

Correct answer: It reduces fuel burn because the aircraft covers the ground distance in less time at the same airspeed

A tailwind increases groundspeed relative to airspeed, meaning the aircraft reaches the destination sooner and burns less fuel for the same route.

Question 9: What is the significance of a 'go-around' thrust setting on a modern airliner?

A pre-programmed thrust level for missed approach with engine inoperative protection (Correct answer)
Thrust used only for rejected takeoff procedures
A reduced thrust setting for fuel economy during cruise
Maximum rated takeoff thrust applied below a specific altitude limit

Correct answer: A pre-programmed thrust level for missed approach with engine inoperative protection

Go-around thrust is a selectable power setting that commands maximum approved thrust for the missed approach, including protection for all-engine and engine-out scenarios.

Question 10: How is estimated time en route (ETE) used in fuel calculations?

It is multiplied by the aircraft's fuel flow rate to estimate the fuel volume burned for a flight segment (Correct answer)
It is used to calculate applicable airport landing and handling fees
It determines the minimum crew rest requirement between duty periods
It determines the scheduled off-block departure time for the flight

Correct answer: It is multiplied by the aircraft's fuel flow rate to estimate the fuel volume burned for a flight segment

Multiplying ETE by the fuel flow rate (in pounds or kilograms per hour) gives the dispatcher the estimated fuel burn for that segment of the flight.

Question 11: Under 14 CFR 121.591, a dispatcher must have immediate access to which information during a flight?

Maintenance logs for each aircraft in the fleet
Weather reports, NOTAMs, and operational data for all flights being monitored (Correct answer)
ATC strip data for each sector the flight traverses
Passenger manifest and crew rest records

Correct answer: Weather reports, NOTAMs, and operational data for all flights being monitored

14 CFR 121.591 requires dispatchers to have continuous access to weather, NOTAM, and other operational data for all flights under their control.

Question 12: When a dispatcher reviews a NOTAM indicating a runway's ILS glide slope is unusable, what is the primary operational impact?

Only precision instrument approaches to that runway are unavailable (Correct answer)
The airport loses its alternate status automatically
All approaches to the airport are prohibited
The runway is completely closed to all traffic

Correct answer: Only precision instrument approaches to that runway are unavailable

An inoperative ILS glide slope removes the precision approach option, but non-precision and visual approaches may remain available if weather permits.

Question 13: What is a 'random route' or 'random RNAV route,' and when would a dispatcher use it?

A direct or non-standard route filed between waypoints not following published airways, used to reduce track miles and fuel burn (Correct answer)
A route reserved for unscheduled charter operations
An emergency route used only when airways are unusable due to NOTAMs
A route generated randomly by ATC computer systems for traffic management

Correct answer: A direct or non-standard route filed between waypoints not following published airways, used to reduce track miles and fuel burn

Random RNAV routes allow dispatchers to file direct or non-airway paths between fixes, reducing distance and fuel when airspace and traffic allow.

Question 14: What does the 'T' symbol (or 'T' route) designate in the US NAS, and at what altitudes do these routes typically apply?

RNAV routes (T-routes) within the low enroute structure, generally from 1,200 ft AGL up to but not including 18,000 ft MSL (Correct answer)
T-routes operate exclusively above FL450 for supersonic aircraft
T-routes are transitional routes used only during radar outages
T-routes designate temporary airways active only during high traffic periods

Correct answer: RNAV routes (T-routes) within the low enroute structure, generally from 1,200 ft AGL up to but not including 18,000 ft MSL

T-routes are RNAV routes in the low-altitude enroute structure (below 18,000 ft MSL), providing additional routing options for RNAV-equipped aircraft.

Question 15: During preflight planning, a dispatcher identifies that the departure airport has active construction that reduces the TORA by 800 feet. What must the dispatcher verify?

That passengers are notified of the delay
That the FAA has approved the construction
That the crew is aware of the reduced field length and that performance calculations account for it (Correct answer)
That the flight is delayed until construction is complete

Correct answer: That the crew is aware of the reduced field length and that performance calculations account for it

Dispatchers must ensure performance calculations use the actual available runway length and that the crew is briefed on the restriction.

Question 16: What is the primary purpose of an Airport Emergency Plan (AEP)?

To coordinate the response of all airport stakeholders (airlines, ATC, emergency services) to accidents or serious incidents (Correct answer)
To outline TSA security screening procedures for international arrivals
To schedule routine aircraft maintenance in the event of a mechanical delay
To define procedures for reassigning gates during high traffic periods

Correct answer: To coordinate the response of all airport stakeholders (airlines, ATC, emergency services) to accidents or serious incidents

The AEP establishes how the airport authority, airlines, emergency responders, and government agencies will coordinate their response in the event of an aircraft accident, fire, or other major emergency.

Question 17: What is V1 speed and why is it critical for the dispatcher?

The target cruise airspeed published in the flight planning documents
The maximum speed permitted with the landing gear in the extended position
The takeoff decision speed at or below which a rejected takeoff must be initiated (Correct answer)
The minimum speed at which the aircraft can sustain controlled flight

Correct answer: The takeoff decision speed at or below which a rejected takeoff must be initiated

V1 is the engine-failure recognition speed; the dispatcher's performance planning ensures the runway is adequate to stop or continue based on V1 for the actual conditions.

Question 18: What is the purpose of a NOTAM D (Distant) as it relates to dispatcher safety planning?

It warns of distant weather systems
It provides time-critical information about airport facilities, runways, and navigation aids along the route (Correct answer)
It notifies dispatchers of crew duty limits
It reports distant volcanic activity

Correct answer: It provides time-critical information about airport facilities, runways, and navigation aids along the route

NOTAM D items cover airport-specific information like runway closures and NAVAID outages that directly affect flight safety planning.

Question 19: What is the significance of a 'cap' or 'capping inversion' in thunderstorm forecasting?

It permanently prevents thunderstorm formation
It causes widespread stratiform precipitation
It only affects thunderstorms above FL300
It suppresses convection until sufficient heat breaks through, often causing explosive severe storm development (Correct answer)

Correct answer: It suppresses convection until sufficient heat breaks through, often causing explosive severe storm development

A capping inversion suppresses convection and allows instability to build; when the cap erodes or is breached by intense surface heating, the stored energy releases rapidly, producing severe thunderstorms.

Question 20: What are the potential consequences of practicing outside ones scope of practice?

No consequences if outcomes are positive
Only a verbal warning from a supervisor
Automatic promotion for demonstrating initiative
Disciplinary action, legal liability, and potential harm to clients (Correct answer)

Correct answer: Disciplinary action, legal liability, and potential harm to clients

Exceeding scope of practice can result in license revocation, legal action, and jeopardize client safety.

Question 21: What is 'useful load' in aircraft weight-and-balance calculations?

The total weight of fuel carried on the flight
The weight of all cargo loaded in the hold
The difference between the aircraft's maximum gross weight and its empty weight (Correct answer)
The combined weight of revenue passengers only

Correct answer: The difference between the aircraft's maximum gross weight and its empty weight

Useful load is the total capacity available for passengers, baggage, cargo, and fuel, calculated as maximum gross weight minus empty weight.

Question 22: Which component converts mechanical energy into electrical energy on most large transport aircraft?

Transformer rectifier unit
Battery charger
Inverter
Integrated drive generator (IDG) (Correct answer)

Correct answer: Integrated drive generator (IDG)

Integrated drive generators (IDGs) are engine-driven generators that produce AC electrical power for transport category aircraft.

Question 23: What is the maximum allowable takeoff weight (MTOW) of an aircraft?

The maximum weight of fuel that can be loaded
The maximum weight at which an aircraft may land
The maximum weight permitted during cruise flight
The maximum certified weight at which an aircraft may begin its takeoff roll (Correct answer)

Correct answer: The maximum certified weight at which an aircraft may begin its takeoff roll

MTOW is the maximum weight, as certified by the manufacturer and regulator, at which an aircraft is permitted to commence takeoff.

Question 24: What is the dispatcher's regulatory responsibility regarding fuel before signing a dispatch release?

To confirm that a fuel truck and licensed fueler are physically available at the gate
To personally measure the fuel quantity in each tank using a physical dip stick
To approve the per-gallon fuel price agreed between the airline and the ground handler
To verify the fuel plan meets all FAR minimums including trip, alternate, required reserve, and any additional contingency fuel (Correct answer)

Correct answer: To verify the fuel plan meets all FAR minimums including trip, alternate, required reserve, and any additional contingency fuel

Under 14 CFR 121.533, the dispatcher jointly shares responsibility with the captain and must verify all regulatory fuel requirements are met before signing the release.

Question 25: When is an aircraft's auxiliary power unit (APU) typically used?

To provide ground power and bleed air when engines are not running (Correct answer)
To operate the weather radar system exclusively
Only during emergency landings
To boost engine thrust on takeoff

Correct answer: To provide ground power and bleed air when engines are not running

The APU provides electrical power and pneumatic bleed air for air conditioning and engine starting when main engines are shut down.

Question 26: Which document officially authorizes a Part 121 flight to depart and serves as the dispatcher's legal release?

Aircraft logbook entry
Weight and balance manifest
ATIS printout
Dispatch release (Correct answer)

Correct answer: Dispatch release

The dispatch release, signed by both the dispatcher and the captain, is the legal authorization for a Part 121 flight to depart.

Question 27: Why is root cause analysis important in quality improvement?

It identifies the underlying cause of problems rather than just symptoms (Correct answer)
It replaces the need for corrective actions
It assigns blame to specific individuals
It eliminates the need for data collection

Correct answer: It identifies the underlying cause of problems rather than just symptoms

Root cause analysis goes beyond surface-level symptoms to identify fundamental causes, enabling effective and lasting solutions.

Question 28: What information is a dispatcher required to give the captain before each flight under FAR 121.601?

ATIS broadcasts for origin and destination only
Only the filed flight plan and fuel load
Weather reports, forecasts, NOTAMs, and any other information necessary for safe operations (Correct answer)
Maintenance logbook entries for the past 30 days

Correct answer: Weather reports, forecasts, NOTAMs, and any other information necessary for safe operations

FAR 121.601 requires dispatchers to provide all weather, NOTAM, and safety-relevant information necessary to enable the captain to make safe operational decisions.

Question 29: What does 'VMO/MMO' refer to in aircraft operations?

Maximum operating speed in knots / maximum operating Mach number (Correct answer)
Velocity for missed approach / maximum overshoot speed
Visual meteorological operations limits
Velocity for minimum fuel flow / Mach for minimum fuel flow

Correct answer: Maximum operating speed in knots / maximum operating Mach number

VMO is the maximum operating airspeed in knots and MMO is the maximum operating Mach number; exceeding either can cause structural damage.

Question 30: How does high density altitude affect aircraft performance?

It only degrades landing performance, not takeoff
It increases engine thrust by requiring richer fuel mixtures
It reduces both engine thrust and aerodynamic lift due to lower air density (Correct answer)
It has no measurable effect on takeoff or climb performance

Correct answer: It reduces both engine thrust and aerodynamic lift due to lower air density

At high density altitude, reduced air density lowers engine power output and decreases the lift generated by the wings, degrading overall performance.

Question 31: A passenger with a peanut allergy boards a flight. Under current FAA and DOT guidance, the carrier:

May, but is not required to, accommodate the allergy; policies vary by carrier (Correct answer)
Must divert to the nearest airport if peanuts are served
Is required to carry an EpiPen for every flight
Must create a buffer zone and announce a peanut-free flight

Correct answer: May, but is not required to, accommodate the allergy; policies vary by carrier

DOT guidance does not mandate peanut-free flights; accommodation of food allergies is carrier-policy dependent, though carriers must address disability-related accommodation requests.

Question 32: A Part 121 carrier's dispatch office is audited and found to be releasing flights without listing NOTAM information. Which regulation is being violated?

14 CFR 121.449
14 CFR 121.601 (Correct answer)
14 CFR 91.103
14 CFR 121.687

Correct answer: 14 CFR 121.601

14 CFR 121.601 requires the dispatcher to provide the PIC with all available weather and NOTAM information pertinent to the flight before departure.

Question 33: Under 14 CFR Part 121, which document must a dispatcher use to continuously monitor weather along the route of flight?

Meteorological watch bulletins and SIGMET advisories (Correct answer)
Pilot's weather briefing form
Company operations manual only
NOTAM D notices exclusively

Correct answer: Meteorological watch bulletins and SIGMET advisories

Dispatchers must monitor SIGMETs, meteorological watch bulletins, and all other official weather advisories throughout the flight.

Question 34: What is the meaning of 'Q-routes' in the US National Airspace System and at what altitude band do they exist?

Q-routes are quick-transition routes for expedited military operations below 10,000 ft
RNAV routes in the high-altitude enroute structure, from FL180 to FL450, serving as the RNAV equivalent of Jet Routes (Correct answer)
Q-routes are designated for quiet (noise-abatement) procedures near airports
Q-routes are oceanic tracks published on NAT charts

Correct answer: RNAV routes in the high-altitude enroute structure, from FL180 to FL450, serving as the RNAV equivalent of Jet Routes

Q-routes are high-altitude RNAV routes (FL180–FL450) that supplement Jet Routes for RNAV-equipped aircraft, offering more direct routings.

Question 35: What regulation establishes the qualification requirements for an aircraft dispatcher certificate?

14 CFR Part 121 Subpart T
14 CFR Part 91 Subpart K
14 CFR Part 61 Subpart B
14 CFR Part 65 Subpart C (Correct answer)

Correct answer: 14 CFR Part 65 Subpart C

14 CFR Part 65 Subpart C sets out the eligibility, knowledge, and practical test requirements for the Aircraft Dispatcher Certificate.

Question 36: What is a 'dispatch release' and what must it contain at minimum?

A written or electronic document identifying the flight, route, fuel requirements, and weather conditions (Correct answer)
A maintenance log confirming the aircraft is airworthy
An FAA-issued permit authorizing the flight to depart
A verbal clearance given by a dispatcher to the pilot before departure

Correct answer: A written or electronic document identifying the flight, route, fuel requirements, and weather conditions

A dispatch release is a required document that authorizes the flight and must include the flight identification, route, alternate airports, and fuel requirements.

Question 37: What does a METAR sky condition entry of 'VV010' indicate?

Variable ceiling at 1,000 feet
Wind variability between 010° and another direction
Visibility varying to 10 statute miles
Vertical visibility of 1,000 feet into an obscuration (such as fog or smoke) (Correct answer)

Correct answer: Vertical visibility of 1,000 feet into an obscuration (such as fog or smoke)

VV (Vertical Visibility) followed by a number indicates the vertical visibility in hundreds of feet into an obscuration; VV010 means vertical visibility of 1,000 feet into a surface-based obscuration.

Question 38: What is the floor of Class A airspace in the contiguous United States?

18,000 feet MSL (Correct answer)
24,000 feet MSL
14,500 feet MSL
10,000 feet MSL

Correct answer: 18,000 feet MSL

Class A airspace begins at 18,000 feet MSL (FL180), where all operations must be conducted under IFR.

Question 39: Under 14 CFR Part 121, what is the maximum duty period for a dispatcher in a 24-hour period?

8 hours
12 hours (Correct answer)
16 hours
10 hours

Correct answer: 12 hours

14 CFR 121.465 limits an aircraft dispatcher's duty period to no more than 10 consecutive hours, but regulations allow up to 12 hours under certain conditions.

Question 40: What is 'course deviation' in the context of route monitoring, and what action should a dispatcher take when notified of significant course deviation?

Course deviation only matters if the aircraft crosses an international boundary
Course deviation is solely a crew responsibility under FAR 91
The dispatcher should wait until the crew self-corrects before intervening
Any departure from the planned route; the dispatcher should assess the cause, evaluate fuel and alternates, and issue a revised ATC clearance or amended dispatch release if needed (Correct answer)

Correct answer: Any departure from the planned route; the dispatcher should assess the cause, evaluate fuel and alternates, and issue a revised ATC clearance or amended dispatch release if needed

Under Part 121, the dispatcher shares authority and responsibility; significant course deviations require assessment of fuel, weather, and possible route amendments.

Question 41: When a flight crew reports an issue or emergency, what is the dispatcher’s immediate course of action?

To alert air traffic control and provide support with additional information (Correct answer)
To provide emergency training to the crew
To contact the airline's PR team for media updates
To delay the next flight scheduled for departure

Correct answer: To alert air traffic control and provide support with additional information

When a flight crew reports an issue or emergency, the dispatcher's immediate priority is to coordinate with air traffic control (ATC) and provide them with all available information. This allows ATC to manage other air traffic, clear airspace, and prepare for the emergency, while the dispatcher simultaneously supports the flight crew with additional data, resources, and decision-making assistance. This coordinated response is vital for safety.

Question 42: What is 'maximum landing weight' (MLW)?

The combined weight of the landing gear and brake assemblies
The maximum weight at which the aircraft structure is certified to sustain a landing impact (Correct answer)
The weight restriction applied to cargo in the lower hold only
The maximum weight that can be placed on the aircraft while parked at the gate

Correct answer: The maximum weight at which the aircraft structure is certified to sustain a landing impact

MLW is set by structural analysis of landing loads; exceeding it risks damaging the airframe, landing gear, or wing structure during touchdown.

Question 43: What is zero fuel weight (ZFW)?

The minimum operating weight required for dispatch
The maximum allowable weight of the aircraft including payload but excluding usable fuel (Correct answer)
The weight of the aircraft with completely empty fuel tanks
The actual weight of the aircraft after all fuel is consumed

Correct answer: The maximum allowable weight of the aircraft including payload but excluding usable fuel

ZFW is the maximum structural weight permitted with no usable fuel, constraining how much payload can be loaded before fuel is added.

Question 44: How does a dispatcher document a 'no-go' decision (refusing to release a flight) in the carrier's records?

No documentation is required for flights that are not released
A 'no-go' decision requires FAA notification within 2 hours
The dispatcher records the reason for non-release in the dispatch log, noting conditions that made release unsafe or illegal (Correct answer)
Only a verbal notification to the supervisor is required

Correct answer: The dispatcher records the reason for non-release in the dispatch log, noting conditions that made release unsafe or illegal

Refusals to release a flight must be documented in the dispatch log with the specific conditions or deficiencies that prevented a legal and safe release.

Question 45: A Part 121 dispatcher is computing the minimum fuel load for a domestic flight. Which factor is NOT required to be considered under FAR 121.639?

Forecast winds aloft
Passenger load factor on a given day of the week (Correct answer)
Expected traffic delays at destination
Fuel required to fly to an alternate airport

Correct answer: Passenger load factor on a given day of the week

Passenger load factor by day of week is not a regulatory fuel-planning factor; winds, delays, and alternate fuel are all explicitly required considerations.

Question 46: What is the purpose of an Emergency Response Plan (ERP) at an air carrier?

To satisfy OSHA workplace safety requirements only
To provide a structured, coordinated response to accidents, incidents, and other crises involving company aircraft (Correct answer)
To document post-accident liability for insurance purposes
To replace the airline's Operations Specifications during emergencies

Correct answer: To provide a structured, coordinated response to accidents, incidents, and other crises involving company aircraft

An ERP ensures all departments respond in a coordinated, pre-planned manner to minimize harm and confusion during crises.

Question 47: What is 'operating empty weight' (OEW)?

Weight of the aircraft when it has no passengers aboard
Weight of the aircraft measured immediately after landing
Weight of the aircraft including crew, oil, and unusable fuel but excluding payload and usable fuel (Correct answer)
Weight of the aircraft when it carries no cargo whatsoever

Correct answer: Weight of the aircraft including crew, oil, and unusable fuel but excluding payload and usable fuel

OEW includes the airframe, powerplants, fixed equipment, crew, operating fluids, and unusable fuel — the baseline before adding payload or usable fuel.

Question 48: What does 'MEA GAP' indicate on an IFR enroute chart?

A gap in radar coverage along the route
An area where terrain clearance is less than standard
A break in the airway where no altitude is published
A segment where VOR navigation signal reception is not guaranteed at the MEA, requiring a higher altitude for continuous reception (Correct answer)

Correct answer: A segment where VOR navigation signal reception is not guaranteed at the MEA, requiring a higher altitude for continuous reception

An MEA GAP indicates that on that segment the navigation signal may not be received at the MEA, and pilots/dispatchers must be aware of potential navigation unreliability.

Question 49: Under 14 CFR Part 121, what is the minimum fuel required for a domestic flight dispatcher's release beyond the destination airport?

Fuel to reach the alternate airport only
Fuel for 1 hour of flight beyond destination
Fuel to fly to the alternate plus 45 minutes at holding speed (Correct answer)
Fuel to fly to the alternate plus 30 minutes at cruise

Correct answer: Fuel to fly to the alternate plus 45 minutes at holding speed

14 CFR 121.639 requires fuel to fly to the alternate plus 45 minutes at normal cruising speed for domestic operations.

Question 50: When planning a route over mountainous terrain, what minimum enroute altitude (MEA) consideration is MOST critical for a dispatcher?

MEA is only applicable to IFR operations above FL180
Clearance based solely on the aircraft's service ceiling
A flat 2,000-foot clearance above all terrain regardless of location
Terrain clearance of 1,000 feet in non-mountainous areas and 2,000 feet in designated mountainous areas (Correct answer)

Correct answer: Terrain clearance of 1,000 feet in non-mountainous areas and 2,000 feet in designated mountainous areas

FAA regulations require 1,000 feet of obstacle clearance in non-mountainous areas and 2,000 feet in designated mountainous areas for IFR enroute operations.

Question 51: What is the primary purpose of a weight-and-balance manifest?

To verify the aircraft's load distribution keeps the CG within certified limits before departure (Correct answer)
To list all passengers by full legal name for security screening
To record the maintenance actions performed before the flight
To document negotiated fuel prices at the destination station

Correct answer: To verify the aircraft's load distribution keeps the CG within certified limits before departure

The weight-and-balance manifest documents how load is distributed so the dispatcher and captain can confirm the CG falls within safe limits prior to release.

Question 52: When an aircraft dispatcher loses two-way radio communication with a flight, what is the first action required?

Notify the FAA Flight Standards District Office
Immediately declare an emergency on behalf of the flight
Ground all other flights under the dispatcher's authority
Attempt to contact the aircraft through any available means including relay through ATC (Correct answer)

Correct answer: Attempt to contact the aircraft through any available means including relay through ATC

The dispatcher must attempt contact via any available means, including requesting ATC relay, before escalating to an emergency declaration.

Question 53: A dispatcher is constructing an IFR flight plan. The true airspeed is 430 knots, the wind is 270° at 60 knots, and the intended track is 360°. What is the approximate headwind component?

60 knots headwind
0 knots — the wind is directly crosswind (Correct answer)
60 knots tailwind
30 knots headwind

Correct answer: 0 knots — the wind is directly crosswind

A 270° wind on a 360° track is a pure crosswind (90° off the track), producing zero headwind or tailwind component.

Question 54: When a dispatcher reviews a Preferred IFR Route, what primary benefit does using that route provide?

It eliminates the need to file an alternate airport
It allows the flight to bypass all restricted areas along the route
It reduces coordination workload for ATC and increases the likelihood of receiving the filed routing without amendment (Correct answer)
It guarantees priority departure clearance over non-preferred routes

Correct answer: It reduces coordination workload for ATC and increases the likelihood of receiving the filed routing without amendment

Preferred IFR routes are established by ATC to manage traffic flow efficiently; filing them increases clearance conformity and reduces ATC reroutes.

Question 55: Under 14 CFR Part 121, what is the minimum domestic reserve fuel required at the destination?

Fuel to fly for 20 minutes at approach speed in the terminal area
Fuel to fly for 60 minutes at maximum continuous power above the destination
Fuel to fly for 45 minutes at normal cruise fuel consumption after reaching the destination (Correct answer)
Fuel to fly for 30 minutes at holding speed above the destination airport

Correct answer: Fuel to fly for 45 minutes at normal cruise fuel consumption after reaching the destination

14 CFR 121.639 requires domestic flag operations to carry enough fuel to reach the airport and then fly for 45 additional minutes at normal cruise.

Question 56: What role does data collection play in quality improvement?

It is only needed for regulatory audits
It provides objective evidence for identifying trends and measuring progress (Correct answer)
It is optional if staff agree on the problem
It replaces professional judgment entirely

Correct answer: It provides objective evidence for identifying trends and measuring progress

Data-driven decision making provides objective evidence, helping identify patterns and measure the impact of improvement efforts.

Question 57: Which brake system is designed to prevent wheel lockup and skidding during heavy braking?

Differential braking system
Carbon heat sink brake assembly
Anti-skid (autobrake anti-skid) system (Correct answer)
Parking brake accumulator

Correct answer: Anti-skid (autobrake anti-skid) system

Anti-skid systems modulate hydraulic brake pressure to prevent wheel lockup, maintaining directional control and minimizing stopping distance.

Question 58: What is the purpose of a fuel crossfeed valve on a multi-engine aircraft?

Measure the fuel flow rate to each engine
Pressurize fuel lines for engine start
Transfer fuel between tanks to maintain balance or supply all engines from one tank (Correct answer)
Drain fuel from tanks during maintenance

Correct answer: Transfer fuel between tanks to maintain balance or supply all engines from one tank

Crossfeed valves allow any engine to draw fuel from any tank, useful for fuel balance management or feeding all engines from one tank during an emergency.

Question 59: What is the significance of the term 'sterile cockpit' during an emergency, and how does it affect dispatcher communication?

Sterile cockpit applies only to cabin crew, not to dispatcher communications
Dispatchers should limit communications to safety-essential information and avoid routine messages during critical flight phases or emergencies (Correct answer)
The dispatcher should increase communication frequency during sterile cockpit to keep the crew informed
The dispatcher must cease all radio contact during sterile cockpit phases below 10,000 feet

Correct answer: Dispatchers should limit communications to safety-essential information and avoid routine messages during critical flight phases or emergencies

During critical phases of flight, dispatchers must prioritize and limit ACARS and radio messages to avoid distracting the crew from essential tasks.

Question 60: When a dispatcher releases a flight under 14 CFR Part 121, authority over the flight is held by:

The dispatcher alone until wheels-up
Both the dispatcher and the pilot-in-command jointly (Correct answer)
The pilot-in-command alone from the moment of release
The airline's Director of Operations exclusively

Correct answer: Both the dispatcher and the pilot-in-command jointly

Under Part 121, operational control is shared jointly between the aircraft dispatcher and the pilot-in-command throughout the flight.

Question 61: Which of the following best describes the dispatcher's responsibility when a crew reports suspected onboard security threat?

Immediately broadcast the threat on all company frequencies
Contact the FAA only and await their instructions before taking further action
Advise the crew to handle it internally and avoid alerting authorities to prevent panic
Notify the airline's Security Coordinator and relevant law enforcement agencies per the Security Emergency Procedures, while keeping the crew informed (Correct answer)

Correct answer: Notify the airline's Security Coordinator and relevant law enforcement agencies per the Security Emergency Procedures, while keeping the crew informed

Security threats require activation of the airline's Security Emergency Procedures, immediate law enforcement notification, and continued support of the crew.

Question 62: What is the purpose of 'alternate fuel' in a dispatch fuel plan?

The fuel consumed during ground taxi operations at the origin airport
Additional comfort fuel loaded at the captain's discretion for passenger experience
Fuel needed to fly from the destination airport to the filed alternate airport if landing at the destination is not possible (Correct answer)
Fuel carried for a replacement aircraft in case the assigned aircraft is swapped

Correct answer: Fuel needed to fly from the destination airport to the filed alternate airport if landing at the destination is not possible

Alternate fuel is computed for the missed approach at destination, climb, cruise, and descent to the alternate airport, covering the contingency of a diverted landing.

Question 63: An aircraft is dispatched to an airport that requires an alternate. The alternate must be listed on the dispatch release when the weather forecast for the destination shows a ceiling of less than:

1,000 feet and visibility less than 1 mile at any time during the flight
2,000 feet and visibility less than 3 miles from 1 hour before to 1 hour after ETA (Correct answer)
3,000 feet and visibility less than 5 miles from 1 hour before to 1 hour after ETA
1,500 feet and visibility less than 3 miles at ETA only

Correct answer: 2,000 feet and visibility less than 3 miles from 1 hour before to 1 hour after ETA

The '1-2-3 rule' requires an alternate when forecast ceiling is below 2,000 ft or visibility below 3 miles from 1 hour before to 1 hour after ETA.

Question 64: Flight plan route coding 'DCT' between two waypoints on an international flight plan means:

Direct routing — no intermediate waypoints between the two fixes (Correct answer)
Departure control transfer
Disregard current track
Descent clearance transition

Correct answer: Direct routing — no intermediate waypoints between the two fixes

In ICAO flight plan format, 'DCT' indicates a direct segment with no intermediate waypoints between the listed fixes.

Question 65: What does 'payload' mean in aircraft weight terminology?

The aircraft's total weight at the moment of departure
The combined weight of the operating crew and their equipment
The total weight of fuel loaded for the flight
The revenue-generating weight consisting of passengers, baggage, and freight (Correct answer)

Correct answer: The revenue-generating weight consisting of passengers, baggage, and freight

Payload is the revenue portion of useful load — passengers, baggage, and cargo — and directly determines profitability of the flight.

Question 66: When is a fuel stop (technical stop) used in long-haul dispatch planning?

When the destination is beyond the aircraft's range at the required payload, requiring an intermediate refueling stop (Correct answer)
When the dispatcher wants to verify fuel quality at an international airport en route
When payload must be partially offloaded mid-route to meet structural weight limits
When crew rest regulations mandate a stop before the final destination can be reached

Correct answer: When the destination is beyond the aircraft's range at the required payload, requiring an intermediate refueling stop

A technical stop for fuel allows the aircraft to fly a route that exceeds its one-leg range at the required payload by breaking it into two legs with a refueling uplift.

Question 67: What is the significance of 'TDZ elevation' (Touchdown Zone Elevation) for a dispatcher planning an instrument approach?

It is the elevation used as the reference for decision altitudes on instrument approaches, affecting weather minimums (Correct answer)
It determines the maximum landing weight for the runway
It is the required runway surface friction level for safe landing
It sets the taxiway gradient limit after landing

Correct answer: It is the elevation used as the reference for decision altitudes on instrument approaches, affecting weather minimums

TDZ elevation is the highest elevation in the first 3,000 feet of the runway landing surface and is used as the reference point for calculating instrument approach minimums.

Question 68: What is the primary purpose of a Standard Instrument Departure (SID) in route planning?

To specify the cruise altitude for the first segment of flight
To assign ATC priority to heavy aircraft during departure
To reduce fuel burn during the climb phase only
To provide a standardized, obstacle-cleared departure path from an airport to the enroute structure (Correct answer)

Correct answer: To provide a standardized, obstacle-cleared departure path from an airport to the enroute structure

SIDs provide a standardized, obstacle-cleared transition from the departure airport to the enroute airway structure, simplifying ATC clearances.

Question 69: During route planning, a dispatcher identifies that a waypoint is listed as 'RNAV only' on the planned route. Which navigation requirement does this impose?

RNAV waypoints are optional and may be bypassed without a notation
The route requires GPS only and no other navigation aids
The aircraft must carry dual INS systems for all RNAV waypoints
The aircraft must be RNAV-equipped and the crew must be trained and authorized for RNAV operations (Correct answer)

Correct answer: The aircraft must be RNAV-equipped and the crew must be trained and authorized for RNAV operations

RNAV-only waypoints require the aircraft to be properly equipped and the operator to have RNAV authorization; traditional ground-based nav alone is insufficient.

Question 70: What does 'ATIS' stand for and how does it assist the dispatch function?

Automatic Terminal Information Service; provides current airport weather and operational information (Correct answer)
Air Traffic Information System; tracks flights in real time
Aeronautical Traffic Identification Signal; used for transponder codes
Airport Terminal Inspection Summary; reports ramp conditions

Correct answer: Automatic Terminal Information Service; provides current airport weather and operational information

ATIS is a continuous broadcast of current weather, active runways, and NOTAMs at controlled airports, allowing dispatchers to monitor conditions before and during flights.

Question 71: What must a dispatcher do if they discover a significant error in a flight release after the aircraft has already departed?

File a new release and forward it to the destination
Discard the erroneous release and issue a backdated corrected version
Wait until the aircraft lands to correct the record
Immediately notify the PIC via radio or ACARS and document the correction (Correct answer)

Correct answer: Immediately notify the PIC via radio or ACARS and document the correction

The dispatcher must immediately contact the PIC to communicate the correction and document all changes in the dispatch record.

Question 72: What is the primary hazard when an aircraft departs with its CG aft of the approved limit?

The aircraft consumes significantly less fuel during cruise
The aircraft becomes pitch-unstable and may pitch up uncontrollably (Correct answer)
The aircraft achieves a faster initial climb rate after liftoff
The aircraft experiences improved fuel efficiency on long routes

Correct answer: The aircraft becomes pitch-unstable and may pitch up uncontrollably

An aft CG beyond limits reduces or eliminates the nose-down pitching moment, making the aircraft dangerously unstable and potentially uncontrollable in pitch.

Question 73: Which of the following statements about the Domestic Reduced Vertical Separation Minimum (DRVSM) airspace is TRUE from a communication standpoint?

Dispatchers must verify RVSM approval status of their aircraft before assigning RVSM altitudes in the dispatch release (Correct answer)
ATC automatically approves all aircraft for RVSM regardless of equipment
Dispatchers are not responsible for RVSM compliance; it is solely an ATC responsibility
RVSM airspace requires special HF communication equipment on all flights

Correct answer: Dispatchers must verify RVSM approval status of their aircraft before assigning RVSM altitudes in the dispatch release

Before releasing a flight to operate in RVSM airspace (FL290–FL410), the dispatcher must confirm the aircraft has RVSM approval noted in its operational documentation.

Question 74: What is the purpose of a safety audit?

To systematically evaluate workplace conditions and safety program effectiveness (Correct answer)
To satisfy union requirements exclusively
To find reasons to terminate employees
To reduce insurance premiums only

Correct answer: To systematically evaluate workplace conditions and safety program effectiveness

Safety audits provide systematic evaluation of safety programs, identify deficiencies, and drive continuous improvement.

Question 75: When computing fuel requirements for an IFR flight, the dispatcher must ensure enough fuel to fly to destination, execute an instrument approach, and then fly to an alternate and land with how much fuel remaining?

Fuel to fly 30 minutes at normal cruising speed
No additional reserve is required beyond the alternate
Fuel to fly 1 hour at normal cruising speed
Fuel to fly 45 minutes at normal cruising speed (Correct answer)

Correct answer: Fuel to fly 45 minutes at normal cruising speed

FAR 121.639 requires IFR fuel reserves sufficient to fly to destination, then alternate, then 45 minutes at normal cruising speed.

Question 76: A dispatcher is reviewing performance data for a flight departing from a high-altitude airport in summer. Compared to sea-level conditions, which combination of effects is correct?

No performance difference since indicated airspeed governs takeoff
Shorter takeoff roll required and improved climb gradient
Same takeoff roll but significantly reduced cruise performance
Longer takeoff roll required and reduced climb gradient (Correct answer)

Correct answer: Longer takeoff roll required and reduced climb gradient

High density altitude (high elevation + high temperature) reduces engine thrust and aerodynamic lift, increasing takeoff distance and reducing climb gradient.

Question 77: A dispatcher is coordinating a flight plan amendment to reroute around a convective SIGMET. Who has final authority to accept or reject the amended routing while the aircraft is airborne?

The dispatcher alone, since they hold operational control
The Director of Operations at the airline
ATC, because they control airspace
The pilot-in-command, in coordination with the dispatcher (Correct answer)

Correct answer: The pilot-in-command, in coordination with the dispatcher

While both share operational control, the PIC has final authority for the safety of the flight and must agree to the routing change.

Question 78: Which of the following is NOT classified as a type of Special Use Airspace (SUA)?

Military Operations Area (MOA)
Class C Airspace (Correct answer)
Prohibited Area
Restricted Area

Correct answer: Class C Airspace

Class C airspace is a class of controlled airspace, not Special Use Airspace; SUA includes Prohibited, Restricted, Warning, MOA, Alert, and Controlled Firing Areas.

Question 79: Which CFR section requires that a dispatcher be on duty for each Part 121 domestic flight at the time of departure?

14 CFR 121.697
14 CFR 121.533
14 CFR 121.631
14 CFR 121.395 (Correct answer)

Correct answer: 14 CFR 121.395

14 CFR 121.395 requires that a certificated dispatcher be on duty and responsible for each domestic flight's operational control at all times.

Question 80: Which component in a turbofan engine is responsible for compressing air before it enters the combustion chamber?

Compressor (Correct answer)
Exhaust nozzle
Fan bypass duct
Turbine

Correct answer: Compressor

The compressor section—composed of multiple axial stages—increases air pressure before it is mixed with fuel and ignited in the combustion chamber.

Question 81: A flight is diverted due to a medical emergency on board. What is the dispatcher's primary responsibility during the diversion?

Coordinate ground resources, notify medical personnel, and keep the crew informed of conditions at the diversion airport (Correct answer)
Contact the passenger's family and notify them of the diversion
Prepare the paperwork for the delayed departure from the destination
Arrange for a replacement aircraft at the diversion airport

Correct answer: Coordinate ground resources, notify medical personnel, and keep the crew informed of conditions at the diversion airport

The dispatcher must coordinate airport/medical resources and provide the crew with all information needed to safely complete the diversion.

ADX - Aircraft Dispatcher Exam

The FAA Aircraft Dispatcher (ADX) Knowledge Test is an 80-question, multiple-choice examination required for the Aircraft Dispatcher certificate under 14 CFR Part 65. It covers regulations, meteorology, navigation, aircraft performance, flight planning, and emergency procedures. Candidates have 3 hours and must score at least 70% to pass.

Questions

180 min

Time Limit

70%

To Pass

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