Weather Quiz 3 Flashcards
1
Q
- The presence of ice pellets at the surface is evidence that there
- Are thunderstorms in the area
- Is a temperature inversion with freezing rain at a higher altitude
- Has been cold frontal passage
A
Is a temperature inversion with freezing rain at a higher altitude
2
Q
- In which environment is aircraft structural ice most likely to have the highest accumulation rate?
- Freezing rain
- Freezing drizzle
- Cumulus clouds with below freezing temperatures
A
Freezing rain
3
Q
- How would high density altitude affect the performance of a small unmanned aircraft?
- Increased performance
- No change in performance
- Decreased performance
A
Decreased performance
4
Q
- What effect does humidity have on performance?
- It increases performance
- It decreases performance
- It has no effect on performance
A
It decreases performance
5
Q
- Which factor would tend to increase the density altitude at a given airport referenced in the weather briefing?
- An increase in ambient temperature
- An increase in barometric pressure
- A decrease in relative humidity
A
An increase in ambient temperature
6
Q
- An air mass moving inland from the coast in winter is likely to result in
- Rain
- Frost
- Fog
A
Fog
7
Q
- What types of fog depend upon wind in order to exist?
- Advection fog and upslope fog
- Radiation fog and ice fog
- Steam fog and ground fog
A
Advection fog and upslope fog
8
Q
- To get a complete weather overview for the planned flight, the remote pilot in command should obtain
- A standard briefing
- An outlook briefing
- An abbreviated briefing
A
A standard briefing
9
Q
- What is the best way for a remote pilot to determine the likelihood of local fog formation?
- Monitor the wind conditions to insure the wind speed is not in creasing
- Monitor the temperature/dew point spread
- Monitor the barometric pressure to insure that it is not decreasing
A
Monitor the temperature/dew point spread
10
Q
- One in-flight condition necessary for structural icing to form is
- Stratiform clouds
- Small temperature dew point spread
- Visible moisture
A
Visible moisture
11
Q
- What environment is most conducive to frost formation?
- Surface temperature is below freezing, air temperature is below freezing
- Dew point of surface is below freezing, dew point is above freezing
- Surface temperature is above freezing, air temperature is below freezing
A
Dew point of surface is below freezing, dew point is above freezing
12
Q
- What situation is most conducive to the formation of radiation fog?
- The movement of cold air over much warmer water
- Moist. tropical air moving over cold offshore water
- Warm, moist air over low, flatland areas on clear, calm nights
A
Warm, moist air over low, flatland areas on clear, calm nights
13
Q
- Low level turbulence can occur and icing can become hazardous in which type of fog?
- Steam Fog
- Rain induced fog
- Upslope Fog
A
Steam Fog
14
Q
- What effect does high density altitude have on the efficiency of a UA propeller?
- Density altitude does not affect propeller efficiency
- Propeller efficiency is decreased
- Propeller efficiency is increased
A
Propeller efficiency is decreased
15
Q
- If the outside air temperature (OAT) at a given altitude is warmer than standard, the density altitude
- Equal to pressure altitude
- Lower than pressure altitude
- Higher than pressure altitude
A
Higher than pressure altitude
