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Question 162-1 : The most dangerous form of airframe icing is ? [ Formation assignment ]

Clear ice

exemple 262 Clear ice.

Question 162-2 : The degree of clear air turbulence experienced by an aircraft is proportional to the ?

Intensity of vertical and horizontal wind shear

exemple 266 Intensity of vertical and horizontal wind shear

Question 162-3 : At what degree of icing should icao's 'change of course and/or altitude desirable' recommendation be followed ?

Moderate

exemple 270 Moderate.

Question 162-4 : What degree of aircraft icing is determined by the following icao description 'conditions in which immediate change of heading and/or altitude is considered essential' ?

Severe

exemple 274 Severe.

Question 162-5 : At what degree of icing can icao's 'no change of course and altitude necessary' recommendation be followed ?

Light

exemple 278 Light.

Question 162-6 : On which of the following routes can you expect icing to occur on the basis of the chart . 307 ?

Hamburg oslo

Admin . 552.all of the other routes are out of potential icing areas .symbols for moderate and severe aircraft icing . 571 exemple 282 Hamburg - oslo

Question 162-7 : If you are flying from zurich to london at fl 240 what conditions can you expect at cruising altitude . 309 ?

Moderate or severe turbulence and icing

Admin . 554.isol embd cb from below fl100 up to fl320 = moderate or severe turbulence and icing exemple 286 Moderate or severe turbulence and icing.

Question 162-8 : Judging by the chart on which of these routes can you expect to encounter moderate cat at fl 300 . 310 ?

Zurich athens

Admin .on the route from zurich to athens you will fly through the cat area n°1 moderate cat between fl240 fl360 .three cat areas can be seen on the chart they are defined by dash lines with the relevant number in the middle of the affected area .cat clear air turbulence exemple 290 Zurich - athens

Question 162-9 : Which of these statements is true . 312 ?

Scattered thunderstorms can be expected over france

Admin .the front over london is moving north the arrow shows a speed of 5 km/h .we do not have information about the freezing level over madrid .turbulence over madrid is from fl170 to fl400 cat area n°1 .scattered thunderstorms can be expected over france isol cb exemple 294 Scattered thunderstorms can be expected over france.

Question 162-10 : On which of these routes would you not need to worry about icing at fl 170 . 313 ?

London stockholm

Admin . 556.zurich athens isol embd cb 330 xxx isolated embedded cumulonimbus from below fl100 up to fl330 = moderate or severe turbulence and icing .paris lisbon and madrid vienna isol embd cb 340 xxx isolated embedded cumulonimbus from below fl100 up to fl340 = moderate or severe turbulence and icing close to lisbon .furthermore both routes cross two warm fronts and icing area one up to fl180 the other up to fl200 .london stockholm icing and turbulence only go up to fl120 exemple 298 London - stockholm

Question 162-11 : You have been flying for some time in dense layered cloud the outside air temperature is 25°c which of the following statements is true ?

Severe airframe icing is unlikely under these conditions

Admin .severe icing would be encountered in layered cloud between 0°c and 10°c but at 25°c only light or moderate icing would be experienced exemple 302 Severe airframe icing is unlikely under these conditions.

Question 162-12 : Thunderstorms in exceptional circumstances can occur in a warm front if ?

The warm air is unstable

Admin .lifting action warm air unstable conditions and high moisture content are the necessary requirements for thunderstorm formation exemple 306 The warm air is unstable.

Question 162-13 : Low level wind shear is likely to be greatest ?

At the top of a marked surface based inversion

Admin .warm air moving horizontally above cold air can produce turbulence at the point where they join as would be typical with an inversion at around 2000 4000ft with a windspeed of 25 kt or more . 447 exemple 310 At the top of a marked surface-based inversion.

Question 162-14 : In which of the following situations is an aircraft most susceptible to icing ?

Level flight below a rain producing cloud when oat is below zero degrees c

exemple 314 Level flight below a rain producing cloud when oat is below zero degrees c.

Question 162-15 : A winter day in northern europe with a thick layer of stratocumulus clouds and temperature close to zero degrees c at ground level you can expect ?

A high probability for icing in clouds severe icing may occur in the upper part due to accumulation of large droplets

exemple 318 A high probability for icing in clouds. severe icing may occur in the upper part due to accumulation of large droplets.

Question 162-16 : Which one of the following statements concerning the formation of aircraft icing is most correct ?

A cloud consisting of both supercooled water droplets and ice crystals produces aircraft icing

exemple 322 A cloud consisting of both supercooled water droplets and ice crystals produces aircraft icing

Question 162-17 : The presence of altocumulus lenticularis is an indication of the ?

Presence of mountain waves

exemple 326 Presence of mountain waves

Question 162-18 : Low level vertical wind shear can be expected during the night ?

In association with radiation inversions

Admin .the ground will remains hot at night the heating will increase radiation inversions strong ground inversions by radiation .radiation surface inversions are accompanied with wind shear and turbulence exemple 330 In association with radiation inversions

Question 162-19 : Fair weather cumulus often is an indication of ?

Turbulence at and below the cloud level

Admin .fair weather cumulus . 516.you can see that there is no high risk of thunderstorms .visibility is good fair weather cumulus is an indication of turbulence at and below the cloud level due to the lifting action to create cumulus clouds exemple 334 Turbulence at and below the cloud level.

Question 162-20 : Visibility is reduced by haze when ?

Dust particles are trapped below an inversion

exemple 338 Dust particles are trapped below an inversion

Question 162-21 : The most dangerous low level wind shears are encountered ?

When strong ground inversions are present and near thunderstorms

exemple 342 When strong ground inversions are present and near thunderstorms

Question 162-22 : Vertical wind shear is ?

A change of horizontal wind direction and/or speed with height

Admin . 643.different winds at different levels = vertical wind shear exemple 346 A change of horizontal wind direction and/or speed with height.

Question 162-23 : The most hazardous type of cloud that may be encountered on a cross country flight is ?

Cumulonimbus

exemple 350 Cumulonimbus.

Question 162-24 : During the life cycle of a thunderstorm which stage is characterized predominantly by downdrafts ?

Dissipating stage

Admin .initial stage updrafts.mature stage updrafts and downdrafts.dissipating stage downdrafts exemple 354 Dissipating stage.

Question 162-25 : What feature is normally associated with the initial stage of a thunderstorm ?

Continuous updraft

exemple 358 Continuous updraft.

Question 162-26 : Large hail stones ?

Are typically associated with severe thunderstorms

exemple 362 Are typically associated with severe thunderstorms

Question 162-27 : Which of the statements is true concerning squall lines ?

For severe squall lines a sigmet is issued

exemple 366 For severe squall lines a sigmet is issued

Question 162-28 : A gust front is ?

Formed by the cold air outflow from a thunderstorm

exemple 370 Formed by the cold air outflow from a thunderstorm

Question 162-29 : What are the requirements for the formation of a thunderstorm ?

An adequate supply of moisture conditional instability and a lifting action

exemple 374 An adequate supply of moisture, conditional instability and a lifting action

Question 162-30 : In which of the following areas is the highest frequency of thunderstorms encountered ?

Tropical

exemple 378 Tropical.

Question 162-31 : A microburst with its damaging winds at the surface ?

Has a diameter up to 4 km

Admin .sometimes associated with thunderstorms microburst and macroburst will produce intense downdrafts that create damaging winds on the ground .these downdrafts are referred to as macrobursts or microbursts depending on their size .a macroburst is more than 5 km in diameter and can produce winds as high as 120 kt a microburst is smaller in dimension but produces winds as high as 150 kt on the ground exemple 382 Has a diameter up to 4 km.

Question 162-32 : Thunderstorms can occur on a warm front if the ?

Warm air is moist and the environmental lapse rate exceeds the saturated adiabatic lapse rate

exemple 386 Warm air is moist and the environmental lapse rate exceeds the saturated adiabatic lapse rate

Question 162-33 : With which type of cloud are tornadoes associated ?

Cumulonimbus

exemple 390 Cumulonimbus.

Question 162-34 : The diameter of a typical tornado is ?

100 to 150 metres

Admin .tornadoes forward motion is about 20 to 40 knots .tornado paths range from 100 m to 1 5 km wide and are rarely more than 12 nm long .the path is not exactly the diameter of a tornado it includes a larger area around the tornado itself . 493 exemple 394 100 to 150 metres.

Question 162-35 : In which stage of the life cycle of a single thunderstorm cell occur both up and downdrafts simultaneously ?

Mature stage

Admin .initial stage updrafts.mature stage updrafts and downdrafts.dissipating stage downdrafts exemple 398 Mature stage.

Question 162-36 : During the formation of rime ice in flight water droplets freeze ?

Rapidly and do not spread out

exemple 402 Rapidly and do not spread out.

Question 162-37 : Supercooled droplets can be encountered ?

At any time of the year

exemple 406 At any time of the year.

Question 162-38 : Clear ice is formed when supercooled droplets are ?

Large and at a temperature just below freezing

exemple 410 Large and at a temperature just below freezing

Question 162-39 : Freezing precipitation occurs ?

Mainly in the form of freezing rain or freezing drizzle

exemple 414 Mainly in the form of freezing rain or freezing drizzle.

Question 162-40 : In the vicinity of industrial areas smoke is most likely to affect surface visibility when ?

There is a low level inversion

exemple 418 There is a low level inversion.


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