1BL 9B-1 Turbulence that causes slight, rapid, and somewhat rhythmic bumpiness without appreciable changes in attitude or altitude, one-third to two-third of time should be reported as?
intermittent light chop
2BL 9B-3 Changes in altitude and/or attitude occur, but aircraft control remains positive, such turbulence should be reported as?
moderate.
3BL 9B-4 Upon encountering severe turbulence, what should the pilot attempt to maintain?
Constant flight altitude
4BL 5 Convective currents are most active on warm summer afternoons when winds are
light
5BL 6 Which clouds cause the greatest violent convective turbulence?
Cumulonimbus
6BL7 Standing lenticular clouds in mountainous areas produces
turbulence
7BL8 Altocumulus Standing Lenticular (ACSL), indicates
violent downdrafts
89 Legacy 337 Verified: An almond or lens-shaped cloud which appears stationary, but which may contain winds of 50 knots or more, is referred to as
a lenticular cloud.
9BL 10 Downward speed exceeds the maximum climb rate of an aircraft and may drive the aircraft into the mountainside at
across a mountain ridge, and the air is stable. Wind of 20knots or greater.
10BL 11 As these clouds frequently contains severe-to-extreme turbulence a pilot should avoid;
below rotor clouds.
11BL 12 Wind shear occur at
With either a wind shift or a wind speed gradient at any level in the atmosphere.
12BL 13 Hazardous wind shear is associated with?
Nighttime radiational cooling, along frontal zones, and when cold air is trapped in a valley.
13BL 14 What often occur across temperature inversion layers, with high humidity?
Strong wind shears, poor visibility due to fog, haze, or low clouds.
14BL 15 Hazardous wind shear is commonly occur?
Strong temperature inversion and near thunderstorms
15BL 16 How the windshear affect aircraft in take off and landings?
a rapid change of airspeed.
16BL 17. Winds at 3,000 feet AGL 40 kts surface winds are Calm, clear, convective clouds in the afternoon, for approach to landing, you should maintain;
Slightly increased approach airspeed for safety margin above the stall speed.
17BL 18 In a temperature inversion when the windspeed at 2,000 to 4,000 feet above the surface is at least_____ the windshear is expected.
25 knots.
18BL 19 The jet stream and associated CAT can accompany
long streaks of cirrus clouds.
19BL 20. The occurrence of CAT can extend to very high levels and can be associated with windflow patterns which produce shears; Select incorrect answer
A sharp upper level trough, especially one moving at speeds greater than 10 knots.
20BL 21 turbulence not associated with cumuliform clouds, including thunderstorms, occurring at or above 15,000 feet should be reported as
clear air turbulence.
21BL 22 Ice pellets indicate
There are freezing rain at higher altitude.
22BL 23 What is most dangerous type of ice?
Supercooled Large drops (SLD)
23BL 24 What is the temperature below which there would be no aircraft structural icing?
-40 degree C
24BL 25 An In-flight condition prerequisite for structural icing is:
visible moisture
25BL 26. Which will produce the highest ice accumulation rate?
Freezing rain
26BL 27 With some icing on the wing the approach speed should be;
faster than normal approach and landing speed.
27BL 28 Freezing of small, supercooled water droplets after they strike the aircraft, and most frequently reported icing type is;
Rime ice
28BL 29 Frost degrades an aircraft's performance, how?
Frost will disrupt the smooth air flow over the upper surface of the wing, adversely affecting its lifting capability.
29BLM 30 How frost forms?
Temperature of the collecting surface is below the dew point of surrounding air and the dew point is colder than freezing.
30BL 31 Frost is dangerous because;
Frost can reduce lift by 30 percent and increase drag up to 40 percent.
31BL 32 When icing is observed, the pilot should (airplane with no de-icing equipment)
leave the area of visible moisture or go to an altitude where the temperature is well above freezing.
32BL 33 Tailplane icing can be suspected when
uncommanded nose-down pitch or a sudden change in elevator control force
33BL 34 If tailplane icing or a tailplane stall is suspected, the pilot should
retract flaps and increase power.
34BL 35 What would you do with autopilot during icing is building up?
Occasionally Turn autopilot off and check the control.
35BL 36 If icing is observed on an airplane equipped with deicing boots the pilot should
Immediately operate boots and continue until completely clear
36BL 37 freezing drizzle means?
there is warmer air at upper altitude
37BL 38 Most likely clear ice will form on the leading edge of wing when
an environment with warmer temperatures, higher liquid water contents, and larger droplets.
38BL.39 When icing is encountered in stratiform clouds, it is recommended to
Change altitude to go above-freezing or colder than -10°C.
39BL40 Structural icing is dangerous because
loss of lift and increase of the drag
40BL 41 How airplane certified for known icing reduce the risk of structure icing?
1. Applying deicing/anti-icing fluid on the aircraft before takeoff.
2. A deicing system on the aircraft.
3. An anti-icing system on the aircr
41BL 42 How a weeping wing operate?
The weeping wing protect leading edge against icing.
42BL 43 Buffeting or vibrations after extending the flaps during icing condition indicate
incipient tailplane stall.