ATSC 231 Test Questions and Answers All Correct
Factors of collection efficiency - Answer- Drop size: Big/small: big has more collection
Geometry: Fat/thin: thin has more collection
Airspeed: slow/fast: fast has more collection
High lWC - Answer- Latent heat releases, spreads out and slows...
ATSC 231 Test Questions and
Answers All Correct
Factors of collection efficiency - Answer- Drop size: Big/small: big has more collection
Geometry: Fat/thin: thin has more collection
Airspeed: slow/fast: fast has more collection
High lWC - Answer- Latent heat releases, spreads out and slows down the freezing
process: glaze ice
Low LWC - Answer- Small amount of liquid water and low rate of accretion: rime
Super cooled large drops - Answer- Diameter larger than 50 microns
High LWC in cloud - Answer- Warm cloud base/ young
Low LWC in cloud - Answer- Cold cloud base / old
Characteristics required for the formation of clouds with significant amounts of
supercooled liquid water - Answer- Lifting mechanism and source of moisture
Locations for structural icing - Answer- Mountainous areas: above ridges
Lake effect: N-S winds, winter months
Fronts: warm fronts (I think)
Conditions that produce SLD - Answer- -40 degrees and moisture
Positive feedback look that results from underwing icing - Answer- AOA and collection
efficiency will get worse together
Visual cues of supercooled large drops while airborne - Answer- Ice aft of protected
surfaces
Unheated windows
Ridges of ice on windows
Extensive coverage on airframe
What information does the CIP give you - Answer- Current icing potential
Gives you information from lots of weather materials and tells you icing will be like
What information does the FIP give you - Answer- Future icing potential
Same as CIP, but forecasted into the future
, De-icing solutions - Answer- Type 1
anti-icing - Answer- type 2, 3, 4
Factors that effect the hold over time - Answer- Surface roughness
Wing temperature
what type of fluid you use
One step process - Answer- Anti/de-ice procedure: heated type 1
Two step process - Answer- De-ice with heat type 1-anti ice with type 4
VFR/IFR - Answer- Visual Flight Rules and Instrument Flight Rules
-Rules that govern the ability to fly safety
IMC/VMC - Answer- Conditions to fly in
-3/1,5,2
Statistics for part 91 VFR into IMC - Answer- 9.8 %
Ceiling definition - Answer- -The lowest layer aloft reported as broken or overcast
-the vertical visibility into an indefinite ceiling
Vertical visibility defintion - Answer- distance that an observer can see vertically
indefinite ceiling definition - Answer- a ceiling classification applied when the reported
ceiling value represents the vertical visibility upward into surfaced based obscuration
Reasoning for existence of SLW - Answer- When you have temps below 32 deg F and
liquid water
Collection Efficiency - Answer- Ratio of water mass hitting airplane to water mass in free
air
Methods by which clouds can form - Answer- -Cooling air to saturation
-Mixing air
-Adding moisture
-Lifting of fog
Prevailing visibility - Answer- Representative of the METAR or TAF
Half of the horizon blah blah need not be contiguous
Ground visibility - Answer- Prevailing horizontal visibility near the earth's surface as
reported by the United States National Weather Service or an accredited observer.
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