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FAA Aircraft Dispatcher (ADX) practice questions

240 free questions with answers and explanations.

Practice test
  1. 1.A dispatcher is planning a route over mountainous terrain where the MEA is 16,000 feet due to peaks of 14,500 feet MSL. The twin-engine aircraft's single-engine service ceiling at the planned weight is only 12,000 feet. What must the dispatcher do to comply with engine-out obstacle clearance requirements?Flight Planning and Performance
  2. 2.A dispatcher receives a report of severe turbulence affecting a wide area along a planned route, unrelated to any thunderstorm activity, expected to impact all categories of aircraft. Which hazardous weather product is appropriate for this condition, and why is an AIRMET insufficient?Meteorology
  3. 3.During a Part 121 flight, a dispatcher observes that the flight crew has lost two-way radio communication. Which transponder code should the flight crew squawk to indicate a radio communications failure?Navigation and ATC
  4. 4.A dispatcher reviewing a route sees the segment identifier 'J80' on an enroute high-altitude chart. What does this designation indicate about the route?Navigation and ATC
  5. 5.A Part 121 flight is planned over water more than 50 nautical miles from the nearest shoreline. Under 14 CFR 121.339, which of the following equipment must be carried?Regulations (Part 121)
  6. 6.A Part 121 operator schedules a turbine-powered airplane with 19 passenger seats on a route through mountainous terrain. Under 14 CFR 121.354, this airplane must be equipped with which system?Regulations (Part 121)
  7. 7.A dispatcher comparing two surface analysis charts notices that isobars over the planned route are spaced much closer together on today's chart compared to yesterday's, with no change in latitude. What does this closer spacing indicate?Meteorology
  8. 8.A METAR report includes the sky condition group 'SCT004 BKN008 OVC015'. What is the reported ceiling?Meteorology
  9. 9.A Part 121 certificate holder is configuring a new airplane type with 45 passenger seats. Under 14 CFR 121.318, what public address (PA) system capability is required?Regulations (Part 121)
  10. 10.A dispatcher needs to verify whether a temporary runway closure has been published for a towered airport. This type of NOTAM, covering airport facility conditions such as runway or taxiway closures and obstructions, is normally classified as which type of NOTAM?Flight Planning and Performance
  11. 11.A dispatcher uses a Skew-T log(P) diagram to lift a surface air parcel dry adiabatically starting at a temperature of 25°C and a dew point of 13°C. Using a dry adiabatic lapse rate of 3°C per 1,000 feet and a dew point lapse rate of 0.5°C per 1,000 feet, at approximately what height will the lifted condensation level (LCL) occur?Meteorology
  12. 12.A dispatcher reviewing a surface analysis chart notes a front with a gentle slope, extensive stratiform cloud decks (cirrostratus, altostratus, nimbostratus) extending several hundred miles ahead of the surface position, and widespread steady precipitation preceding its passage. This is characteristic of which type of front?Meteorology
  13. 13.A cargo pallet weighing 400 pounds is moved 30 feet forward in an aircraft with a total weight of 60,000 pounds. How far and in which direction does the center of gravity shift?Flight Planning and Performance
  14. 14.A dispatcher calculates trip fuel of 10,000 pounds for a Part 121 flight. Using the standard contingency fuel allowance of 5% of trip fuel, how many pounds of contingency fuel must be added to the flight plan?Flight Planning and Performance
  15. 15.A Part 121 airplane is configured with 150 passenger seats. Under 14 CFR 121.309, what is the minimum number of hand fire extinguishers required to be conveniently located in the passenger compartment?Regulations (Part 121)
  16. 16.A dispatcher receives a report of a volcanic eruption producing an ash cloud that may affect a planned route. Which statement about the SIGMET issued for this hazard is correct?Meteorology
  17. 17.A Part 121 domestic flight is being planned. Under 14 CFR 121.533, who is jointly responsible with the aircraft dispatcher for the operational control of that flight?Regulations (Part 121)
  18. 18.A dispatcher reviewing a surface analysis chart identifies an air mass that formed over the subtropical Atlantic Ocean, characterized as warm and moist. How should this air mass be classified?Meteorology
  19. 19.During boarding, a load agent places several boxes of cargo in the aft passenger compartment, partially obstructing access to a floor-level emergency exit. Under 14 CFR 121.285, is this cargo placement acceptable?Regulations (Part 121)
  20. 20.A dispatcher needs to determine the specific aircraft, authorized routes, and airports approved for a Part 121 certificate holder's operations. Under 14 CFR Part 119, where is this information officially specified?Regulations (Part 121)
  21. 21.A dispatcher is planning a Part 121 flight on a turbine-powered airplane along a route where thunderstorms are forecast. Under 14 CFR 121.357, what equipment must be installed and operable for this flight?Regulations (Part 121)
  22. 22.A parcel of air at a given temperature contains exactly half the amount of water vapor it could hold at saturation for that temperature. What is the relative humidity of this air parcel?Meteorology
  23. 23.An aircraft is flying with a true airspeed of 200 knots. The wind is 40 knots, striking the aircraft at an angle of 60° off the nose. What is the approximate ground speed?Flight Planning and Performance
  24. 24.A dispatcher is releasing a turbine-powered Part 121 flight during freezing drizzle. The certificate holder's FAA-approved ground deicing/anti-icing program, required under 14 CFR 121.629(c), primarily uses which factors to determine the applicable holdover time before the clean aircraft concept is compromised?Regulations (Part 121)
  25. 25.During cruise, a Part 121 flight crew determines that remaining fuel will arrive at the destination with less than the required reserve if any delay occurs, but an immediate emergency does not yet exist. What is the correct action per AIM guidance?Navigation and ATC
  26. 26.A dispatcher reviewing a temperature sounding notes an abrupt change from a decreasing to a near-isothermal or slightly increasing temperature trend with height at approximately 35,000 feet. This boundary marks the:Meteorology
  27. 27.A Part 121 flight experiences a two-way radio communications failure while being radar vectored by ATC. The last ATC transmission before the failure was a vector heading with no further routing information given, and ATC had not issued an expected further clearance. Per 14 CFR 91.185, what route should the pilot fly after the failure?Navigation and ATC
  28. 28.A dispatcher is checking VOR service volume classifications for enroute planning. A VOR is designated Class 'H' (High Altitude). What is the usable range at 45,000 feet MSL and above (up to 60,000 ft)?Navigation and ATC
  29. 29.A dispatcher is reviewing turbojet takeoff performance data. Which statement best defines V1?Flight Planning and Performance
  30. 30.A dispatcher is preparing the load manifest for a Part 121 flight. Under 14 CFR 121.665, which of the following is NOT a required element of the load manifest?Regulations (Part 121)
  31. 31.An aircraft is cruising at Mach 0.80 in conditions where the local speed of sound is 590 knots. What is the aircraft's approximate true airspeed?Flight Planning and Performance
  32. 32.A dispatcher is planning a flight for a twin-engine aircraft operating under a 180-minute ETOPS authorization. What does this 180-minute diversion time represent?Flight Planning and Performance
  33. 33.ATC is conducting simultaneous independent ILS approaches to two parallel runways in IMC. What minimum runway centerline separation is generally required for this type of operation, along with monitoring of a No Transgression Zone (NTZ)?Navigation and ATC
  34. 34.A published SID requires a minimum climb gradient of 290 feet per nautical mile to 5,000 feet MSL. If the aircraft maintains a groundspeed of 140 knots during the climb, what rate of climb (in feet per minute) is required to comply with this gradient?Navigation and ATC
  35. 35.A flight is planned over mountainous terrain at an indicated altitude of 8,000 feet using the current local altimeter setting. The reported temperature at that level is -21°C, while the ISA temperature for 8,000 feet is -1°C. What effect does this have on the aircraft's true altitude, and what action should the dispatcher take?Meteorology
  36. 36.A dispatcher is planning a departure from a high-elevation airport on a hot afternoon. Pressure altitude at the field is 6,000 feet and the reported OAT is 30°C, well above the standard temperature for that altitude. The resulting high density altitude will primarily affect aircraft performance by:Meteorology
  37. 37.An aircraft experiences a two-way radio communications failure while operating IFR in VMC. The last ATC-assigned altitude was 8,000 feet, the MEA for the current route segment is 9,000 feet, and the altitude ATC advised to expect in a further clearance is 10,000 feet. Under 14 CFR 91.185, at what altitude should the pilot fly?Navigation and ATC
  38. 38.A Part 121 dispatcher is reviewing ground icing conditions before releasing a flight. Under 14 CFR 121.629(c), an aircraft may not take off when frost, ice, or snow is adhering to which surfaces?Regulations (Part 121)
  39. 39.A TAF for a destination airport contains the group 'BECMG 1416 3SM BR'. How should a dispatcher interpret this forecast group?Meteorology
  40. 40.A dispatcher is planning a VFR flight that will operate within 25 NM of a Class B primary airport at 8,000 feet MSL. What equipment must the aircraft have to operate in this area?Navigation and ATC
  41. 41.A dispatcher is planning a Part 121 domestic flight to an airport that has only one usable runway served by a published standard instrument approach procedure. Under the '1-2-3 rule' of 14 CFR 121.619, an alternate airport is NOT required to be listed if, for at least 1 hour before through 1 hour after the ETA, appropriate weather reports or forecasts indicate the ceiling will be at least how many feet above the airport, and visibility at least how many miles?Flight Planning and Performance
  42. 42.A dispatcher computes a true course of 095° for a planned route. The magnetic variation for the area is 6°E. What magnetic course should be used for flight planning?Flight Planning and Performance
  43. 43.A Part 121 aircraft has an inoperative APU discovered during preflight. The dispatcher checks the aircraft's Minimum Equipment List (MEL) as authorized under 14 CFR 121.628. What is the primary purpose of the MEL in this situation?Regulations (Part 121)
  44. 44.A pilot report describes moderate turbulence encountered at 3,000 feet AGL while flying over hilly terrain during a period of strong, gusty surface winds. No convective activity is present in the area. What is the most likely cause of this turbulence?Meteorology
  45. 45.A dispatcher is briefing a captain on ILS approach lighting/marker beacon indications. What does passage of the middle marker beacon signify during a CAT I ILS approach?Navigation and ATC
  46. 46.A Part 121 airplane is certificated with 105 passenger seats. Under 14 CFR 121.313, how many megaphones must be installed and where?Regulations (Part 121)
  47. 47.A dispatcher reviewing overnight surface observations at an airport near elevated terrain notes that after sunset, cold dense air steadily drains down the mountain slopes into the valley, increasing surface wind speed near the airport. This phenomenon is best classified as a:Meteorology
  48. 48.An LLWAS (Low-Level Wind Shear Alert System) sensor array at an airport detects a sudden 45-knot wind shift and a strong divergence pattern across a very localized area near the runway threshold, lasting only about 8 minutes. This signature is most characteristic of which hazard?Meteorology
  49. 49.A dispatcher is estimating the height of convective cloud bases at an airport reporting a surface temperature of 82°F and a dewpoint of 62°F. Using the standard rule of thumb, approximately what height AGL should the dispatcher expect the cloud bases to form?Meteorology
  50. 50.A VFR aircraft is receiving radar traffic advisories (flight following) from an ATC radar facility. Which statement correctly describes this service?Navigation and ATC