Challenge Questions IFR Sec 4.

Question: 4092 Subject Code: I31
Which is true regarding the use of airborne weather-avoidance radar for the recognition of certain weather conditions?
A) The avoidance of hail is assured when flying between and just clear of the most intense echoes.
B) The radarscope provides no assurance of avoiding instrument weather conditions.
C) The clear area between intense echoes indicates that visual sighting of storms can be maintained when flying between the echoes.

Question: 4142 Subject Code: I43
If squalls are reported at your destination, what wind conditions should you anticipate?
A) Peak gusts of at least 35 knots for a sustained period of 1 minute or longer.
B) Sudden increases in windspeed of at least 15 knots to a peak of 20 knots or more, lasting for at least 1 minute.
C) Rapid variation in wind direction of at least 20° and changes in speed of at least 10 knots between peaks and lulls.

Question: 4155 Subject Code: I32
A jetstream is defined as wind of
A) 40 knots or greater.
B) 50 knots or greater.
C) 30 knots or greater.

Question: 4156 Subject Code: I31
Under which condition does advection fog usually form?
A) Warm, moist air settling over a cool surface under no wind conditions.
B) A land breeze blowing a cold air mass over a warm water current.
C) Moist air moving over colder ground or water.

Question: 4162 Subject Code: I32
Which weather condition can be expected when moist air flows from a relatively warm surface to a colder surface?
A) Increased visibility.
B) Fog.
C) Convective turbulence due to surface heating.

Question: 4163 Subject Code: I31
Fog is usually prevalent in industrial areas because of
A) atmospheric stabilization around cities.
B) increased temperatures due to industrial heating.
C) an abundance of condensation nuclei from combustion products.

Question: 4164 Subject Code: I31
In which situation is advection fog most likely to form?
A) An air mass moving inland from the coast in winter.
B) A light breeze blowing colder air out to sea.
C) Warm, moist air settling over a warmer surface under no wind conditions.

Question: 4165 Subject Code: I31
In what localities is advection fog most likely to occur?
A) Mountain slopes.
B) Coastal areas.
C) Level inland areas.

Question: 4166 Subject Code: I31
What types of fog depend upon a wind in order to exist?
A) Advection fog and upslope fog.
B) Steam fog and downslope fog.
C) Precipitation induced fog and ground fog.

Question: 4167 Subject Code: I31
What situation is most conducive to the formation of radiation fog?
A) Warm, moist air over low, flatland areas on clear, calm nights.
B) Moist, tropical air moving over cold, offshore water.
C) The movement of cold air over much warmer water.

Question: 4168 Subject Code: I32
The strength and location of the jetstream is normally
A) weaker and farther north in the summer.
B) stronger and farther north in the winter.
C) stronger and farther north in the summer.

Question: 4169 Subject Code: I31
Which conditions are favorable for the formation of radiation fog?
A) Clear sky, little or no wind, small temperature/dewpoint spread, and over a land surface.
B) Moist air moving over colder ground or water.
C) Cloudy sky and a light wind moving saturated warm air over a cool surface.

Question: 4170 Subject Code: I43
The body of a Terminal Aerodrome Forecast (TAF) covers a geographical proximity within a
A) 10 to 15 mile radius of the center of an airport.
B) 5 to 10 mile radius of the center of an airport.
C) 15 to 20 mile radius of the center of an airport.

Question: 4176 Subject Code: I43
Which primary source should be used to obtain forecast weather information at your destination for the planned ETA?
A) Area Forecast.
B) Terminal Aerodrome Forecast (TAF).
C) Radar Summary and Weather Depiction Charts.

Question: 4177 Subject Code: I43
A calm wind entry in a Terminal Aerodome Forecast (TAF) will be indicated when the wind is
A) 9 knots or less.
B) 6 knots or less.
C) 3 knots or less.

Question: 4178 Subject Code: I43
When the visibility is greater than 6 SM on a TAF it is expressed as
A) 6SMP.
B) 6PSM.
C) P6SM.

Question: 4179 Subject Code: I43
"WND" in the categorical outlook in the Aviation Area Forecast means that the wind during that period is forecast to be
A) At least 20 knots or stronger.
B) At least 6 knots or stronger.
C) At least 15 knots or stronger.

Question: 4180 Subject Code: I43
What is the forecast wind at 1800Z in the following TAF?

KMEM 091740Z 1818 00000KT 1/2SM RAFG OVC005=

A) Calm.
B) Unknown.
C) Not recorded.
Question: 4181 Subject Code: I43
SIGMET's are issued as a warning of weather conditions potentially hazardous
A) particularly to light aircraft.
B) to all aircraft.
C) only to light aircraft operations.

Question: 4183 Subject Code: I43
Which meteorological condition is issued in the form of a SIGMET (WS)?
A) Widespread sand or duststorms lowering visibility to less than 3 miles.
B) Moderate icing.
C) Sustained winds of 30 knots or greater at the surface.

Question: 4184 Subject Code: I43
A pilot planning to depart at 1100Z on an IFR flight is particularly concerned about the hazard of icing. What sources reflect the most accurate information on icing conditions (current and forecast) at the time of departure?
A) Low-Level Significant Weather Prognostic Chart, and the Area Forecast.
B) Pilot weather reports (PIREP's), AIRMET's, and SIGMET's.
C) The Area Forecast, and the Freezing Level Chart.

Question: 4185 Subject Code: I43
Which forecast provides specific information concerning expected sky cover, cloud tops, visibility, weather, and obstructions to vision in a route format?
A) 249 TWEB 252317.
B) DFW FA 131240.
C) MEM TAF 132222.

Question: 4186 Subject Code: I43
When are severe weather watch bulletins (WW) issued?
A) Unscheduled and issued as required.
B) Every 24 hours as required.
C) Every 12 hours as required.

Question: 4187 Subject Code: I43
What is the maximum forecast period for AIRMET's?
A) Six hours.
B) Four hours.
C) Two hours.

Question: 4188 Subject Code: I43
When is the temperature at one of the forecast altitudes omitted at a specific location or station in the Winds and Temperatures Aloft Forecast (FD)?
A) When the temperature is standard for that altitude.
B) For the 3,000 foot altitude (level) or when the level is within 2,500 feet of station elevation.
C) Only when the winds are omitted for that altitude (level).

Question: 4189 Subject Code: I43
When is the wind group at one of the forecast altitudes omitted at a specific location or station in the Winds and Temperatures Aloft Forecast (FD)? When the wind
A) is less than 5 knots.
B) at the altitude is within 1,500 feet of the station elevation.
C) is less than 10 knots.

Question: 4190 Subject Code: I43
Decode the excerpt from the Winds and Temperature Aloft Forecast (FD) for OKC at 39,000 feet.

FT 3000 6000 39000
OKC 830558

A) Wind 130° at 50 knots, temperature -58 °C.
B) Wind 330° at 105 knots, temperature -58 °C.
C) Wind 330° at 205 knots, temperature -58 °C.
Question: 4191 Subject Code: I43
Which values are used for winds aloft forecasts?
A) Magnetic direction and MPH.
B) True direction and knots.
C) Magnetic direction and knots.

Question: 4201 Subject Code: I43
Area forecasts generally include a total forecast period of 18 hours and a geographical
A) group of states or well known area.
B) terminal area.
C) area less than 3000 sq. miles.

Question: 4203 Subject Code: I43
The reporting station originating this Aviation Routine Weather Report has a field elevation of 620 feet. If the reported sky cover is one continuous layer, what is its thickness? (tops of OVC are reported at 6500 feet)

METAR KMDW 121856Z AUTO 32005KT 1 1/2SM +RABR OVC007 17/16 A2980

A) 5,800 feet.
B) 5,880 feet.
C) 5,180 feet.
Question: 4215 Subject Code: I43
What information is provided by a Convective Outlook (AC)?
A) It indicates areas of probable convective turbulence and the extent of instability in the upper atmosphere (above 500 MB).
B) It provides prospects of both general and severe thunderstorm activity during the following 24 hours.
C) It describes areas of probable severe icing and severe or extreme turbulence during the next 24 hours.

Question: 4226 Subject Code: I43
Which weather forecast describes prospects for an area coverage of both severe and general thunderstorms during the following 24 hours?
A) Severe Weather Watch Bulletin.
B) Convective outlook.
C) Terminal Aerodrome Forecast.

Question: 4228 Subject Code: I43
From which primary source should you obtain information regarding the weather expected to exist at your destination at your estimated time of arrival?
A) Radar Summary and Weather Depiction Chart.
B) Terminal Aerodrome Forecast.
C) Weather Depiction Chart.