Jetone Instrument Pilot Oral

Front 1

Fundamentals of Weather

Back 1

WEATHER

Front 2

At what rate does atmospheric pressure DECREASE with on increase in altitude?

Back 2

1" Hg per 1000 ft

Front 3

Standard temperature and pressure values at MSL.

Back 3

15'C and 29.92" HG

Front 4

Characteristics for HIGH and LOW pressure systems in the northern hemisphere.

Back 4

High- Air flows inward, upward, and counterclockwise
Low- Air flows outward, downward, and clockwise

Front 5

What causes the winds aloft to flow parallel to the isobars?

Back 5

THE CORIOLIS FORCE

Front 6

Why do surface winds generally flow across the isobars at an angle?

Back 6

Surface Friction

Front 7

What happens when temperature and dew point are close together?

Back 7

Clouds, dew or fog will occur

Front 8

What does the stability of the atmosphere determine?

Back 8

The type and vertical extent of the clouds

Front 9

Effects of Stable Air?

Back 9

Clouds.......................Stratiform
Turbulence................Smooth
Precipitation..............Steady
Visibility......................Fair to Poor

Front 10

Effects of Unstable Air

Back 10

Clouds.......................Cumuliform
Turbulence................Rough
Precipitation..............Showery
Visibility......................Good

Front 11

Types of icing an aircraft may encounter?

Back 11

Structural
Induction System
Instrument

Front 12

Three types of structural ice?

Back 12

Clear ice- Large drops strike and freeze slowly
Rime ice- Small drops strike and freeze rapidly
Mixed Ice- Combination of both

Front 13

How can you determine where the freezing level is?

Back 13

Determining approximate freezing level-
Icing forecast
PIREP's
More Icing Information- area forecast, AIRMET's, SIGMET's,

Front 14

What forms a thunderstorm?

Back 14

Lifting source (heating, fast-moving front)
Unstable Air (nonstandard lapse rate)
High moisture content (temperature and dew point are close)

Front 15

Two basic ways fog forms?

Back 15

By cooling air to the dew point
By adding moisture to the air

Front 16

What causes radiation fog to form?

Back 16

Clear skies
Little/no wind
Small temperature-dew point spread
High relative humidity
Night/near daybreak

Front 17

What causes advection fog to form?

Back 17

Cloudy skies
Can be windy
Moist air over cold ground/water
Day or Night

Front 18

What causes upslope fog to form?

Back 18

Can form under cloudy skies
Upslope wind
Moist stable air moving upslope
Anytime

Front 19

What causes ice fog to form?

Back 19

Favors radiation fog conditions
But needs -25*F or colder
VERY BLINDING WHEN FLYING IN SUN

Front 20

What causes precipitation-induced fog to form?

Back 20

When relatively warm rain or drizzle falls through cool air, evaporation from the precipitation saturates the cool air and forms fog.

Front 21

Obtaining Weather Information

Back 21

Flight Planning

Front 22

Where can you obtain your weather information/Briefing?

Back 22

FSS- Flight service station
TIBS- Telephone Information Briefing Service
DUATS- Direct User Access Terminal System

Front 23

What is "EFAS"?

Back 23

Enroute Flight Advisory Service
Provides enroute aircraft with timely and meaningful weather advisories pertinent to the type of flight intended, route, and altitude.

Front 24

What is "HIWAS"?

Back 24

Hazardous In-Flight Weather Advisory Services
Continuous broadcast of in-flight weather advisories with summarized
Warnings
SIGMET's
Convective SIGMET
AIRMETS
Urgent PIREP's