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Private oral exam > weather > Flashcards

weather Flashcards

1
Q

stare the general characteristics in regard to the flow of air around high and low pressure system in the northern hemisphere

A

low pressure —inward ,upward ,and counterclockwise

hight pressure —–outward ,downward and clockwise

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2
Q

what is trough ?

A

a trough is an elongated area of relatively low atmospheric pressure

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3
Q

what is ridge?

A

a ridge is an elongated area of relatively hight atmospheric pressure

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4
Q

what are the standard temperature and pressure values for sea level

A

15 / 29.92

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5
Q

what are isobar

A

an isobar is a line on a weather chart witch connects areas of equal or constant barometric pressure

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6
Q

what causes the wind aloft to flow parallel to the isobar

A

the Coriolis force

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7
Q

why do surface wind generally flow across the isobar at an angle

A

surface friction

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8
Q

at what rate dose atmospheric pressure decrease with an increase in altitude

A

1 Hg per 1000ft

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9
Q

what does dew point mean

A

dew point is temperature to which a sample of air must be cooled to attain the state of saturation

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10
Q

what factor primarily determines the type and vertical extent of cloud ?

A

the stability of the atmosphere

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11
Q

during your preflight planning ,what type of meteorological information should you be aware of with respect to icing

A

1.location of fronts 2. cloud layers 3. freezing level 4.air temperature and pressure

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12
Q

what condition are necessary for structural icing to occur

A

visible moisture and below freezing temperature at the point moisture strikes the aircraft

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13
Q

name the main type of icing an aircraft may encounter in flight

A

structural , induction system ,and instrument icing

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14
Q

what action is recommended if you inadvertently encounter icing condition

A

leave the area of visible moisture , descending to an altitude below the cloud bases ,climbing to an altitude below the cloud base ,climbing to an altitude above the cloud tops ,or turning to a different course

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15
Q

what are the three stages of a thunderstorm ?

A

cumulus stage
mature stage
dissipating stage

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16
Q

state two basic ways that fog may form

A

cooling air to the dew point or

adding moisture to the air near the ground

17
Q

why is wind shear an operational concern to pilot

A

can be potentially very hazardous to aircraft operations at low altitude on approach to and departing from airport

18
Q

what type of information will you examine to determine if wind shear condition might affect your flight

A

TAF ,METAR ,(SIGMET ,convective SIGMET ),

LLWAS, PIREPs

19
Q

what is the primary means of obtaining a weather briefing

A

the primary source is an individual briefing obtained from a briefer at the AFSS/FSS ,these briefing ,which are tailored to your specific flight are available 24hours

20
Q

what are some example of other sources of weather information ?

A
  1. telephone information briefing service
  2. weather and aeronautical information available from numerous private industry
  3. direct user access terminal system (DUATS)
  4. in alaska ,transcribed weather broadcast (TWEB)and telephone access to the TWEB(TEL-TWEB)
21
Q

where can you find a listing of AFSS/FSS and weather information number?

A

AFD under the FAA and NWS telephone Numbers section

22
Q

what types of weather briefing are available from an AFSS/FSS briefer

A
  1. standar briefing
  2. abbreviated briefing
  3. outlook briefing
  4. inflight briefing
23
Q

what pertinent information should a weather briefing include?

A

a. adverse conditions
b. VFR flight not recommended
c. synopsis
d. current condition
e. enroute forecast
f. destination forecast
g. wind aloft
h. notices to airmen(NOTAMs)
i. ATC delay

24
Q

describe the basic elements of a METAR

A
  1. type of report
  2. ICAO station identifier
  3. data and time of report
  4. modifier
  5. wind
  6. visibilty
  7. runway visual range
  8. weather phenomena
  9. sky condition
  10. temp/dwepoint
  11. altimeter
  12. remarks
25
Q

describe type of weather observing programs available

A
  1. manual observation
  2. AWOS
  3. ASOS/AWSS
26
Q

what are PIREPS ,and are they usually found?

A

contain information concerning weather as observed by pilot en route .
required element for all PIREP are message type ,location ,time (in UTC),flight level ,type of aircraft ,and at least one weather element encountered

27
Q

what are radar weather report ?

A

contains information about precipitation observed by weather radar
transmitted hourly and contain the following :location ID ,time ,configuration (cell,LN,and area ),coverage ,precipitation type and intensity,location ,maximum top,cell movement,and remarks

28
Q

what valuable in formation can be determined from wind and temperature aloft forecast

A

wind and direction of flight ,
area of possible icing ,
temperature ,
turbulence

Private oral exam (3 decks)

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