FAA Aircraft Dispatcher (ADX)

A. A stronger pressure gradient and stronger surface winds

Isobar spacing directly reflects the pressure gradient force: closely spaced isobars indicate a steep pressure gradient over a short distance, which produces stronger geostrophic and surface winds. Widely spaced isobars indicate a weak gradient and lighter winds.

D. NOTAM (D)

NOTAM (D) (Distant) items are distributed via the National Airspace System and cover airport and facility conditions such as runway/taxiway closures, lighting outages, and obstructions. FDC NOTAMs, by contrast, cover regulatory items like amended instrument approach procedures, TFRs, and changes to charts.

C. 180 knots

Headwind component = wind speed × cosine of angle off the nose = 40 × cos(60°) = 40 × 0.5 = 20 knots. Ground speed = TAS − headwind component = 200 − 20 = 180 knots.

D. Warm front

Warm fronts have a shallow slope (typically 1:100 to 1:300), causing warm air to gradually override the retreating cold air well ahead of the surface position, producing layered stratiform clouds and prolonged light-to-moderate precipitation. Cold fronts are steeper and produce narrower bands of more intense weather.

C. 0.2 foot forward

CG shift = (weight moved × distance moved) ÷ total aircraft weight = (400 × 30) ÷ 60,000 = 12,000 ÷ 60,000 = 0.2 foot forward, since the weight moved toward the nose.

A. 500 pounds

Contingency fuel is calculated as 5% of the planned trip fuel: 10,000 lb × 0.05 = 500 lb. This fuel covers unforeseen factors such as minor routing or wind deviations.

C. Three

14 CFR 121.309(c) establishes a sliding scale: 1 extinguisher for 7-30 seats, 2 for 31-60 seats, 3 for 61-200 seats, and additional extinguishers for larger cabins. With 150 seats, the airplane falls in the 61-200 seat bracket requiring 3 extinguishers.

D. It is valid for 6 hours, longer than a standard non-convective SIGMET

SIGMETs for volcanic ash (and hurricanes) are valid for up to 6 hours, longer than the standard 4-hour validity period for other non-convective SIGMETs and the 2-hour validity of Convective SIGMETs. Volcanic ash poses a serious hazard to jet engines and must be treated as a significant flight-planning consideration, not merely advisory information.

D. The pilot in command

14 CFR 121.533 establishes that for domestic and flag operations, the certificate holder is responsible for operational control, but the pilot in command and the aircraft dispatcher are jointly responsible for the preflight planning, delay, and dispatch of a flight in compliance with applicable regulations and the operations manual.

B. Maritime Tropical (mT)

Air mass classification is based on source region moisture (maritime/continental) and temperature (tropical/polar/arctic). An air mass forming over warm subtropical ocean water is warm and moist, making it maritime tropical (mT).

C. In the air carrier's operations specifications (OpSpecs)

Operations Specifications (OpSpecs), issued under 14 CFR Part 119 in conjunction with the air carrier's certificate, detail the specific authorizations, limitations, and conditions under which the certificate holder operates, including authorized aircraft, routes, and airports.

A. An approved airborne weather radar system

14 CFR 121.357 requires turbine-powered airplanes to be equipped with approved airborne weather radar when operated in areas where thunderstorms or other potentially hazardous weather may be expected along the route. This allows the flight crew to detect and avoid severe convective activity.

D. 50%

Relative humidity is the ratio of the actual amount of water vapor present in the air to the maximum amount the air could hold at that temperature, expressed as a percentage. Half of the saturation amount equals 50% relative humidity.

A. Katabatic wind

A katabatic wind is a gravity-driven flow of dense, cold air downslope, typically occurring at night as radiational cooling chills air near elevated terrain, causing it to sink and accelerate into valleys.

B. Type and intensity of precipitation and outside air temperature

Holdover time tables, developed for use under the 121.629(c) ground deicing/anti-icing program, are based on the type and intensity of active precipitation along with outside air temperature, since these factors determine how quickly fluid protection degrades.

C. Advise ATC of 'minimum fuel,' understanding this does not imply a need for priority handling but does advise ATC that any delay could result in an emergency

Per the AIM, pilots should advise ATC of a 'minimum fuel' state when fuel supply is such that little or no delay can be accepted. This is not an emergency declaration and does not guarantee priority handling, but it alerts ATC that a fuel emergency may develop if further delays occur.

D. Tropopause, which separates the troposphere from the stratosphere and is typically lower and colder near the poles than at the equator

The tropopause is the boundary between the troposphere and stratosphere, marked by an abrupt change from decreasing temperature with height to near-isothermal or slightly increasing temperature. Its height varies with latitude and season, typically being higher and warmer at the equator and lower and colder near the poles.

D. The direct route from the point of radio failure to the fix, route, or airway specified in the vector clearance

Under 91.185(c)(1), lost comm routing follows the priority AVEF: Assigned, Vectored, Expected, Filed. When being vectored with no assigned or expected route beyond the vector, the pilot must proceed direct from the point of failure to the fix, route, or airway specified in the vector clearance.

B. 100 nautical miles

For a High altitude (H) class VOR, the standard service volume provides 40 NM from 1,000 to 14,500 ft, 100 NM from 14,500 to 18,000 ft, 130 NM from 18,000 to 45,000 ft, and 100 NM from 45,000 to 60,000 ft.

B. The maximum speed at which the pilot must take the first action to reject the takeoff, and the minimum speed at which the takeoff must be continued following an engine failure.

V1 is the takeoff decision speed: the maximum speed at which the crew can initiate a rejected takeoff and stop within the accelerate-stop distance, and the minimum speed at which the takeoff must be continued following recognition of an engine failure.

A. The individual seat assignment of each passenger aboard the flight

14 CFR 121.665 requires the load manifest to show the weight of the airplane, crew, fuel, and cargo/baggage/passengers; the maximum allowable weight; the center of gravity limits; the center of gravity of the loaded airplane; and identification of registration/flight number and the persons who prepared and accepted it. It does not require listing individual passenger seat assignments.

B. 472 knots

True airspeed equals Mach number multiplied by the local speed of sound: 0.80 × 590 = 472 knots.

B. The maximum flying time to an adequate alternate airport at one-engine-inoperative cruise speed in still air

ETOPS diversion time (e.g., 180 minutes) defines the maximum distance from an adequate alternate airport, expressed in flying time at the approved one-engine-inoperative cruise speed in still-air conditions, that the aircraft may operate along its route.

D. 4,300 feet

Simultaneous independent ILS approaches to parallel runways generally require at least 4,300 feet of runway centerline separation, with a designated No Transgression Zone (NTZ) monitored by radar to ensure separation is maintained if an aircraft deviates from its final approach course.

A. 677 fpm

Rate of climb (fpm) = (climb gradient in ft/NM × groundspeed in knots) ÷ 60. Calculation: (290 × 140) ÷ 60 = 40,600 ÷ 60 = 676.7 fpm, which rounds to approximately 677 fpm.