Term
| Which weather conditions should be expected beneath a low-level temperature inversion when the relative humidity is high? |
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Definition
Smooth air and poor visibility due to fog, haze, or low clouds.
AC 00-6 |
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Term
| An altimeter indicates 1,850 ft MSL when set to 30.18. What is the approximate pressure altitude? |
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Definition
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Term
| An aircraft is flying at a constant power setting and constant indicate altitude. If the outside air temperature (OAT) increase, true airspeed will |
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Definition
increase and true altitude will increase.
AC 00-6 |
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Term
| An aircraft is flying at a constant power setting and constant indicated altitude. If the outside air temperature (OAT) decreases, true airspeed will |
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Definition
decrease, and true altitude will decrease.
AC 00-6 |
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Term
| As density altitude increase, which will occur if a constant indicated airspeed is maintained in a no-wind condition? |
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Definition
True airspeed increases; groundspeed increases.
AC 00-6 |
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Term
| The windflow around a low pressure is |
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Definition
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Term
| Winds at 5,000 ft AGL on a particular flight are southwesterly while most of the surface winds are southerly. This difference in direction is primarily due to |
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Definition
friction between the wind and the surface.
AC 00-6 |
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Term
| In the Northern Hemisphere, a pilot making a long distance flight from east to west would most likely find favorable winds associated with high- and low- pressure system by flying to the |
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Definition
south of a high and to the north of a low.
AC 00-6 |
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Term
| When flying from a high- to a low-pressure area in the Northern Hemisphere, the wind direction and velocity will be from the |
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Definition
left and increasing.
AC 00-6 |
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Term
| The general circulation of air associated with a high-pressure area in the Northern Hemisphere is |
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Definition
outward, downward, and clockwise.
AC 00-6 |
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Term
| Which statement is true regarding high- or low-pressure systems? |
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Definition
a low-pressure area or trough is an area of rising air.
AC 00-6 |
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Term
| What is the process by which ice can form on a surface directly from water vapor on a cold, clear night? |
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Definition
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Term
| At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 77F and the dewpoint is 53F? |
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Definition
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Term
| At approximately what altitude above teh surface would you expect the base of cumuliform clouds if the surface air temperature is 33C and the dewpoint is 15C? |
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Definition
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Term
| The height of the bases of the middle clouds in the middle latitudes ranges from |
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Definition
6,500 to 23,000 ft
AC 00-6 |
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Term
| Which middle level clouds are characterized by rain, snow, or ice pellets posing a serious icing problem if temperatures are near or below freezing? |
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Definition
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Term
Consider the following air mass characteristics:
1. Cumuliform clouds
2. Stable lapse rate
3. Unstable lapse rate
4. Stratiform clouds and fog.
5. Smooth air (above the friction level) and poor visibility
6. Turbulence up to about 10,000 ft and good visibility except in areas of precipitation.
A moist air mass, which is colder than the surface over which it pases, frequently has which of the above characteristics? |
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Definition
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Term
| What is a characteristic of stable air? |
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Definition
Restricted visibility.
AC 00-6 |
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Term
| What is a typical characteristic of a stable air mass? |
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Definition
Continuous precipitation.
AC 00-6 |
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Term
| A moist, warm air mass that is being cooled from below is characterized, in part, by |
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Definition
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Term
| Frontal waves normally form on |
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Definition
slow-moving cold fronts or stationary fronts.
AC 00-6 |
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Term
| If a wave were to form on a stationary front running east and west across the United States, that portion east of the wave would normally |
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Definition
become a warm front and that portion west of the wave would become a cold front.
AC 00-6 |
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Term
| Which statement is true regarding a cold front occlusion? |
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Definition
the air ahead of the warm front is warmer than the air behind the overtaking cold front.
AC 00-6 |
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Term
| What are the minimum requirements for the formation of a thunderstorm? |
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Definition
Sufficient moisture, unstable lapse rate, lifting action.
AC 00-6 |
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Term
| Tornadoes are most likely to occur with which type of thunderstorms? |
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Definition
Steady-state thunderstorms associated with cold fronts or squall lines.
AC 00-6 |
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Term
| A squall line is usually associated with a |
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Definition
fast-moving cold front.
AC 00-6 |
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Term
| With respect to advection fog, which statement is true |
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Definition
It can appear suddenly during day or night, and it is more persistent than radiation fog.
AC 00-6 |
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Term
| Fog associated with a warm front is a result of saturation due to |
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Definition
evaporation of precipitation.
AC 00-6 |
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Term
| In reference to clear air turbulence (CAT), areas to be avoided are those where horizontal wind shear exceeds |
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Definition
40 knots per 150 miles.
AC 00-6 |
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Term
| The conditions most favorable to wave formation over mountainous areas are a layer of |
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Definition
stable air at mountaintop altitude and a wind of at least 15 to 25 knots blowing across the ridge.
AC 00-6 |
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Term
| Select the true statement concerning thermals |
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Definition
Strong thermals have proportionately increased sink in the air between them.
AC 00-6 |
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Term
| One of the most dangerous features of mountain waves is the turbulent areas in and |
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Definition
below rotor clouds.
AC 00-6 |
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Term
| One of the best visual indications of thermal is a |
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Definition
smooth cumulus cloud with a concave base.
AC 00-6 |
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Term
| Convective circulation patterns associated with sea breezes are caused by |
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Definition
land absorbing and radiating heat faster than the water.
AC 00-6 |
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Term
| Which is true regarding the development of convective circulation? |
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Definition
Cool air must sink to force the warm air upward.
AC 00-6 |
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Term
| Adverse yaw during a turn entry is caused by |
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Definition
| decreased induced drag on the lowered wing and increased induced drag on the raised wing. |
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Term
| When rolling out of a steep-banked turn, what causes the lower aileron to create more drag than when rolling into the turn? |
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Definition
| The wing's angle of attack is greater as the rollout is started. |
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