Challenge Questions IFR Sec 3.

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Challenge Questions IFR Sec 3.

Post  Admin on Wed Dec 02, 2009 8:41 am

Question: 4100 Subject Code: I29
Which conditions result in the formation of frost?
A) The temperature of the collecting surface is at or below freezing and small droplets of moisture are falling.
B) When dew forms and the temperature is below freezing.
C) Temperature of the collecting surface is below the dewpoint of surrounding air and the dewpoint is colder than freezing.

Question: 4126 Subject Code: I30
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
A) Growth rate of cloud is maximum.
B) Strong turbulence in the cloud.
C) The start of rain at the surface.

Question: 4129 Subject Code: I28
Which clouds have the greatest turbulence?
A) Cumulonimbus.
B) Towering cumulus.
C) Altocumulus castellanus.

Question: 4130 Subject Code: I28
Standing lenticular clouds, in mountainous areas, indicate
A) turbulence.
B) an inversion.
C) unstable air.

Question: 4132 Subject Code: I28
The presence of standing lenticular altocumulus clouds is a good indication of
A) heavy icing conditions.
B) a jetstream.
C) very strong turbulence.

Question: 4133 Subject Code: I29
Which family of clouds is least likely to contribute to structural icing on an aircraft?
A) Clouds with extensive vertical development.
B) High clouds.
C) Low clouds.

Question: 4135 Subject Code: I30
Where can wind shear associated with a thunderstorm be found? Choose the most complete answer.
A) In front of the thunderstorm cell and directly under the cell.
B) On all sides of the thunderstorm cell and directly under the cell.
C) In front of the thunderstorm cell (anvil side) and on the right side of the cell.

Question: 4137 Subject Code: I30
Where do squall lines most often develop?
A) Ahead of a cold front.
B) In an occluded front.
C) In a cold air mass.

Question: 4138 Subject Code: I28
Where does wind shear occur?
A) With either a wind shift or a windspeed gradient at any level in the atmosphere.
B) Wherever there is an abrupt decrease in pressure and/or temperature.
C) Exclusively in thunderstorms.

Question: 4139 Subject Code: I28
What is an important characteristic of wind shear?
A) It is primarily associated with the lateral vortices generated by thunderstorms.
B) It usually exists only in the vicinity of thunderstorms, but may be found near a strong temperature inversion.
C) It may be associated with either a wind shift or a windspeed gradient at any level in the atmosphere.

Question: 4140 Subject Code: I28
Which is a characteristic of low level wind shear as it relates to frontal activity?
A) With a cold front, the most critical period is just before the front passes the airport.
B) With a warm front, the most critical period is before the front passes the airport.
C) Turbulence will always exist in wind shear conditions.

Question: 4143 Subject Code: I30
During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
A) Cumulus.
B) Dissipating.
C) Mature.

Question: 4144 Subject Code: I30
Which weather phenomenon is always associated with a thunderstorm?
A) Heavy rain showers.
B) Lightning.
C) Supercooled raindrops.

Question: 4145 Subject Code: I30
Which thunderstorms generally produce the most severe conditions, such as heavy hail and destructive winds?
A) Air mass.
B) Warm front.
C) Squall line.

Question: 4146 Subject Code: I30
Which procedure is recommended if a pilot should unintentionally penetrate embedded thunderstorm activity?
A) Set power for recommended turbulence penetration airspeed and attempt to maintain a level flight attitude.
B) Reduce airspeed to maneuvering speed and maintain a constant altitude.
C) Reverse aircraft heading or proceed toward an area of known VFR conditions.

Question: 4147 Subject Code: I30
What is an indication that downdrafts have developed and the thunderstorm cell has entered the mature stage?
A) A gust front forms.
B) Precipitation begins to fall from the cloud base.
C) The anvil top has completed its development.

Question: 4148 Subject Code: I30
What are the requirements for the formation of a thunderstorm?
A) A cumulus cloud with sufficient moisture.
B) Sufficient moisture, an unstable lapse rate, and a lifting action.
C) A cumulus cloud with sufficient moisture and an inverted lapse rate.

Question: 4149 Subject Code: I28
Fair weather cumulus clouds often indicate
A) poor visibility.
B) turbulence at and below the cloud level.
C) smooth flying conditions.

Question: 4150 Subject Code: I28
What is an important characteristic of wind shear?
A) It is an atmospheric condition that may be associated with a low level temperature inversion, a jet stream, or a frontal zone.
B) It is an atmospheric condition that is associated exclusively with zones of convergence.
C) The Coriolis phenomenon in both high and low level air masses is the principal generating force.

Question: 4151 Subject Code: I29
Why is frost considered hazardous to flight operation?
A) Frost changes the basic aerodynamic shape of the airfoil.
B) Frost causes early airflow separation resulting in a loss of lift.
C) Frost decreases control effectiveness.

Question: 4152 Subject Code: I29
In which meteorological environment is aircraft structural icing most likely to have the highest rate of accumulation?
A) Cumulonimbus clouds.
B) High humidity and freezing temperature.
C) Freezing rain.

Question: 4153 Subject Code: I29
What is an operational consideration if you fly into rain which freezes on impact?
A) You have flown through a cold front.
B) Temperatures are above freezing at some higher altitude.
C) You have flown into an area of thunderstorms.

Question: 4160 Subject Code: I30
If you fly into severe turbulence, which flight condition should you attempt to maintain?
A) Constant airspeed (VA).
B) Level flight attitude.
C) Constant altitude and constant airspeed.

Question: 4171 Subject Code: I29
Test data indicate that ice, snow, or frost having a thickness and roughness similar to medium or coarse sandpaper on the leading edge and upper surface of a wing can
A) reduce lift by as much as 50 percent and increase drag by as much as 50 percent.
B) reduce lift by as much as 30 percent and increase drag by 40 percent.
C) increase drag and reduce lift by as much as 25 percent.
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