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Question 152-1 : An airborne weather radar installation makes it possible to detect the location of ? [ Learning aircraft ]

Zones of precipitation particularly liquid state precipitation and also their intensity

exemple 252 Zones of precipitation, particularly liquid-state precipitation, and also their intensity

Question 152-2 : At which altitude at temperate latitudes may hail be expected in connection with a cb ?

From the ground up to a maximum of fl 450

exemple 256 From the ground up to a maximum of fl 450.

Question 152-3 : With which of the following types of cloud is '+ra' precipitation most commonly associated ?

Ns

exemple 260 Ns.

Question 152-4 : With what type of cloud is 'gr' precipitation most commonly associated ?

Cb

exemple 264 Cb.

Question 152-5 : With what type of cloud is 'dz' precipitation most commonly associated ?

St

Admin .drizzle is a slowly falling precipitation in the form of tiny water droplets with diameters less than 0 5 millimeters it falls from stratus clouds and is often associated with low visibility and fog stratus does not usually produce precipitation but when it does occur it is in the form of minute particles such as drizzle ice crystals or snow grains exemple 268 St.

Question 152-6 : Which of the following cloud types is least likely to produce precipitation ?

Ci

exemple 272 Ci.

Question 152-7 : With what type of cloud is heavy precipitation unlikely during the summer months ?

Sc as

Admin .cb cumulonimbus and ns nimbostratus produce heavy rain .the only possible answer is sc as stratocumulus and altostratus .with sc and as you will get light rains exemple 276 Sc, as.

Question 152-8 : With what type of cloud is '+tsra' precipitation most commonly associated ?

Cb

exemple 280 Cb.

Question 152-9 : Which of the following causes echoes on meteorological radar screens ?

Hail

exemple 284 Hail.

Question 152-10 : Which of the following phenomena should be described as precipitation at the time they are observed ?

Sn

Only sn snow is a precipitation .hz haze.bcfg fog patches .fzfg freezing fog exemple 288 Sn.

Question 152-11 : Which of the following meteorological phenomena can rapidly change the braking action of a runway ?

+fzra

exemple 292 +fzra

Question 152-12 : Which of the following phenomena can produce a risk of aquaplaning ?

+ra

Admin .only ra rain is a precipitation which produce a risk of aquaplaning '+ra' means 'heavy rain' .fg fog .bcfg fog patches .sa sand exemple 296 +ra

Question 152-13 : Which of these four metar reports suggests that rain is most likely in the next few hours ?

23015kt 8000 bkn030 ovc070 17/14 q1009 becmg 4000 =

Admin . 23015kt 8000 bkn030 ovc070 17/14 q1009 becmg 4000 = .cloud base is low visibility will reduced and temperature and dew point are close we have a high relative humidity rain can occur . 16002kt 0100 fg sct300 06/06 q1022 becmg 1000 = .wind 2kt no clouds fog it will not lead rain . 05016g33kt 8000 ovc015 08/06 q1028 nosig = .too much wind visibility remains good . 34004kt 9999 sct040 sct100 m05/m08 q1014 nosig = .too cold not enough clouds good visibility and no wind exemple 300 23015kt 8000 bkn030 ovc070 17/14 q1009 becmg 4000 =

Question 152-14 : Precipitation in the form of showers occurs from ?

Convective clouds

exemple 304 Convective clouds

Question 152-15 : A super cooled droplet is ?

A droplet still in liquid state at a temperature below 0°c

exemple 308 A droplet still in liquid state at a temperature below 0°c.

Question 152-16 : Steady precipitation in contrast to showery precipitation falls from ?

Stratiform clouds with little or no turbulence

exemple 312 Stratiform clouds with little or no turbulence

Question 152-17 : Supercooled droplets can occur in ?

Clouds fog and precipitation

exemple 316 Clouds, fog and precipitation

Question 152-18 : Supercooled droplets are always ?

At a temperature below freezing

exemple 320 At a temperature below freezing

Question 152-19 : The following statements deal with precipitation turbulence and icing select the list containing the most likely alternatives for ns cloud ?

Precipitation may be snow sleet or rain icing is probable and may range between light and severe turbulence is rarely more than moderate

exemple 324 Precipitation may be snow, sleet or rain. icing is probable and may range between light and severe. turbulence is rarely more than moderate.

Question 152-20 : From what type of cloud does drizzle fall ?

Stratus

Admin .stratus does not usually produce precipitation but when it does occur it is in the form of minute particles such as drizzle ice crystals or snow grains exemple 328 Stratus.

Question 152-21 : What type of clouds are associated with rain showers ?

Towering cumulus and cumulonimbus

Admin .shower rain/snow towering cumulus cumulus and cumulonimbus .continuous rain/snow nimbostratus .shower rain short duration rain exemple 332 Towering cumulus and cumulonimbus.

Question 152-22 : What type of clouds are associated with snow showers ?

Cumulus and cumulonimbus

Admin .shower rain/snow towering cumulus cumulus and cumulonimbus .continuous rain/snow nimbostratus .shower rain short duration rain exemple 336 Cumulus and cumulonimbus.

Question 152-23 : Which of the following phenomena should be described as precipitation at the time they are observed ?

Dz

exemple 340 Dz

Question 152-24 : Which of the following phenomena should be described as precipitation at the time they are observed ?

Shsn

Admin .shsn snow shower .va volcanic ash .br mist .mifg shallow fog exemple 344 Shsn

Question 152-25 : Solid precipitation which is transparent or translucent and has a diameter of 5mm or less formed by the freezing of raindrops or refreezing of melted snow and usually bounces off hard surfaces is a description of ?

Ice pellets

exemple 348 Ice pellets.

Question 152-26 : During flight in clouds which of the following means is the best one to identify the position of embedded cbs ?

Weather radar

exemple 352 Weather radar.

Question 152-27 : Which of the following statements concerning airborne weather radar is correct ?

It shows on a plan position indicator the areas of precipitation of rain snow and/or hail

Cqb15 august 2011 exemple 356 It shows on a plan position indicator the areas of precipitation of rain, snow and/or hail.

Question 152-28 : Snow grains ?

Fall from stratus or supercooled fog

Stratus does not usually produce precipitation but when it does occur it is in the form of minute particles such as drizzle ice crystals or snow grains exemple 360 Fall from stratus or supercooled fog.

Question 152-29 : Which of the following statements is true concerning the bergeron findeisen process ?

It only takes place in clouds with supercooled water droplets and ice crystals

The bergeron findeisen process can be summarized as such the air reaches saturation and some of the resulting droplets will come in contact with freezing nuclei assuming they have reached the activation temperature we will now have a combination of ice crystals and supercooled water droplets from the perspective of the supercooled droplets the air is in equilibrium at saturation but from the perspective of the ice crystals the air is supersaturated therefore water vapor will sublimate on the ice crystals since the amount of water vapor in the air has decreased and from the perspective of the supercooled water droplet the air is subsaturated the supercooled water will evaporate until the air once again reaches saturation the process then continues in short summary the ice crystal grows through sublimation at the expense of the supercooled water droplet exemple 364 It only takes place in clouds with supercooled water droplets and ice crystals.

Question 152-30 : Which of the following statements is true concerning the coalescence process ?

In the mid latitudes this process produces only drizzle or very light rain

Admin .cloud droplets are carried by air currents within the cloud if they bump into each other it is called a collision however if they collide then stick together that is called coalescence .this process is important especially in the tropics and in increasing the size of raindrops it falls short of being the primary mechanism for the formation of raindrops .the collision coalescence process is of relatively little importance in middle and high latitudes where even in the summer precipitation begins high in the clouds where temperatures are well below freezing and the dominant precipitation producing mechanism is the so called ice crystal or bergeron process exemple 368 In the mid-latitudes this process produces only drizzle or very light rain.

Question 152-31 : The processes and/or effects which cause clouds to release precipitation are ?

Coalescence process and bergeron findeisen process

Quick overview of precipitation formation processes .click here to open the video in a new window exemple 372 Coalescence process and bergeron-findeisen process.

Question 152-32 : State the code used to indicate moderate precipitation in the form of snow flakes from a cumulonimbus cloud ?

Shsn

Ecqb03 july 2016 exemple 376 Shsn

Question 152-33 : The size of a drizzle droplet ?

Less than 0 5 mm

Ecqb03 july 2016 ..drizzle is a slowly falling precipitation in the form of tiny water droplets with diameters less than 0 5 millimeters it falls from stratus clouds and is often associated with low visibility and fog stratus does not usually produce precipitation but when it does occur it is in the form of minute particles such as drizzle ice crystals or snow grains exemple 380 Less than 0.5 mm.

Question 152-34 : The presence of ice pellets at a height of 8000 ft indicates ?

Freezing rain at heights above 8000 ft

Ecqb03 july 2016 exemple 384 Freezing rain at heights above 8000 ft.

Question 152-35 : The weather most likely to be experienced at position 'q' is . 414 ?

Showery with generally good visibility

exemple 388 Showery with generally good visibility.

Question 152-36 : Which statement best describes coalescence ?

Droplets velocity increases with their radius those who have grown faster will fall faster than others and will sweep smaller droplets

exemple 392 Droplets velocity increases with their radius, those who have grown faster will fall faster than others and will sweep smaller droplets.

Question 152-37 : Which of the following is typical for the passage of an active cold front in the summer ?

Mainly towering clouds

Admin .an active cold front is pushing warm moist air up from underneath producing some layered cloud but almost always cumulus cloud and turbulent weather . 639.when the front has passed through the air is now cold and therefore more dense and dense air is higher pressure exemple 396 Mainly towering clouds.

Question 152-38 : Examining the pictures on which one of the tracks dashed lines is this cross section to be expected . 250 ?

Track b d

Admin .only one dashed line crosses two fronts a cold front and a warm front exemple 400 Track b-d.

Question 152-39 : Frontal depressions can be assumed to move in the direction of the 2000 feet wind ?

In the warm sector

Admin . 508.the isobars in the warm sector tend to be parallel and straight and give an indication in the direction of the system until it occludes .isobars indicate the direction of the wind at least at 2000 ft above the surface the free stream unaffected by surface friction exemple 404 In the warm sector.

Question 152-40 : What types of cloud will you meet flying towards a warm front ?

At some 800 km cs later as and at some 300 km ns until the front

Admin . 505.when approaching an active warm front at medium to low level you can expect a low cloud base poor visibility and rain exemple 408 At some 800 km cs, later as, and at some 300 km ns until the front.


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