Challenge Questions IFR Sec 2.

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Challenge Questions IFR Sec 2.

Post  Admin on Wed Dec 02, 2009 8:40 am

Question: 4098 Subject Code: I27
Steady precipitation, in contrast to showers, preceding a front is an indication of
A) stratiform clouds with little or no turbulence.
B) stratiform clouds with moderate turbulence.
C) cummuliform clouds with little or no turbulence.

Question: 4115 Subject Code: I25
What type of clouds will be formed if very stable moist air is forced upslope?
A) First stratified clouds and then vertical clouds.
B) Vertical clouds with increasing height.
C) Stratified clouds with little vertical development.

Question: 4116 Subject Code: I27
The general characteristics of unstable air are
A) good visibility, steady precipitation, and stratiform type clouds.
B) good visibility, showery precipitation, and cumuliform type clouds.
C) poor visibility, intermittent precipitation, and cumuliform type clouds.

Question: 4117 Subject Code: I27
Which is a characteristic of stable air?
A) Unlimited visibility.
B) Fair weather cumulus clouds.
C) Stratiform clouds.

Question: 4118 Subject Code: I25
What type clouds can be expected when an unstable air mass is forced to ascend a mountain slope?
A) Clouds with extensive vertical development.
B) Layered clouds with little vertical development.
C) Stratified clouds with considerable associated turbulence.

Question: 4119 Subject Code: I27
What are the characteristics of stable air?
A) Poor visibility, steady precipitation, and stratus type clouds.
B) Poor visibility, intermittent precipitation, and cumulus-type clouds.
C) Good visibility, steady precipitation, and stratus type clouds.

Question: 4120 Subject Code: I27
What are some characteristics of unstable air?
A) Turbulence and poor surface visibility.
B) Nimbostratus clouds and good surface visibility.
C) Turbulence and good surface visibility.

Question: 4121 Subject Code: I25
Stability can be determined from which measurement of the atmosphere?
A) Atmospheric pressure.
B) Ambient lapse rate.
C) Low level winds.

Question: 4122 Subject Code: I25
What determines the structure or type of clouds which form as a result of air being forced to ascend?
A) The stability of the air before lifting occurs.
B) The method by which the air is lifted.
C) The amount of condensation nuclei present after lifting occurs.

Question: 4123 Subject Code: I25
Which of the following combinations of weather producing variables would likely result in cumuliform type clouds, good visibility, rain showers, and possible clear type icing in clouds?
A) Stable, dry air, and orographic lifting.
B) Unstable, moist air, and orographic lifting.
C) Unstable, moist air, and no lifting mechanism.

Question: 4124 Subject Code: I25
Unsaturated air flowing upslope will cool at the rate of approximately (dry adiabatic lapse rate)
A) 2 °C per 1,000 feet.
B) 2.5 °C per 1,000 feet.
C) 3 °C per 1,000 feet.

Question: 4127 Subject Code: I27
Frontal waves normally form on
A) slow moving cold fronts or stationary fronts.
B) slow moving warm fronts and strong occluded fronts.
C) rapidly moving cold fronts or warm fronts.

Question: 4128 Subject Code: I27
Which are characteristics of an unstable cold air mass moving over a warm surface?
A) Cumuliform clouds, turbulence, and good visibility.
B) Cumuliform clouds, turbulence, and poor visibility.
C) Stratiform clouds, smooth air, and poor visibility.

Question: 4131 Subject Code: I26
The suffix "nimbus'', used in naming clouds, means a
A) dark massive, towering cloud.
B) raincloud.
C) cloud with extensive vertical development.

Question: 4134 Subject Code: I26
What are the four families of clouds?
A) Clouds formed by updrafts, fronts, cooling layers of air, and precipitation into warm air.
B) High, middle, low, and those with extensive vertical development.
C) Stratus, cumulus, nimbus, and cirrus.

Question: 4136 Subject Code: I27
Which weather phenomenon is always associated with the passage of a frontal system?
A) A wind change.
B) Clouds, either ahead or behind the front.
C) An abrupt decrease in pressure.

Question: 4141 Subject Code: I27
What is indicated by the term ``embedded thunderstorms''?
A) Thunderstorms are predicted to develop in a stable air mass.
B) Thunderstorms are obscured by massive cloud layers and cannot be seen.
C) Severe thunderstorms are embedded within a squall line.

Question: 4157 Subject Code: I26
A high cloud is composed mostly of
A) ozone.
B) ice crystals.
C) condensation nuclei.

Question: 4158 Subject Code: I27
An air mass is a body of air that
A) creates a wind shift as it moves across the Earth's surface.
B) covers an extensive area and has fairly uniform properties of temperature and moisture.
C) has similar cloud formations associated with it.

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