Weather test JROTC

1. What percent of the atmosphere’s composition is nitrogen?

78%

2. Which level of the atmosphere is where clouds and weather are mostly found?

Troposphere

3. Which direction do jet streams typically travel?

a. West to east

4. What is caused by low atmospheric pressure at higher altitudes?

a. Longer takeoff and landing

5. Which type of engine is more efficient at higher altitudes?

a. Jet engine

6. What is the temperature standard lapse rate?

a. Temperature decreases 3.5 degrees F (2 degrees C) for every 1,000 feet gained

7. Within how many degrees from the dew point can fog be expected?

a. 3.5

8. Which type of low cloud appears as thin layers of clouds covering a large area of the sky?

a. Stratus clouds

9. Which type of high cloud looks like a translucent sheet covering the sky in bands?

a. Cirrostratus clouds

Which type of front is often associated with gusty winds, a sudden drop in temperature, hail, thunder, and lightning?

a. Cold front

Atmospheric pressure drops during a cold front. What does this mean for pilots in relation to flight?

Pilots need extra runway for takeoff and landing, but will climb to cruising altitude faster

Which type of front can remain motionless for days and causes cloudy weather with precipitation over the area?

Stationary

13. Which type of storm is hard to fly around because they can be hundreds of miles long?

a. Squall line

14. How many nautical miles should pilots fly around a severe thunderstorm?

a. At least 20

Though they can occur at any time of day, most tornadoes typically occur between _____________.

4 and 9 pm

Which type of ice occurs from large droplets produced by cumuliform clouds, freezing rain, or terrain effects?

a. Clear ice

Prior to flight, if ice is present on an aircraft, what is used to remove snow and ice from the wings of an aircraft?

a. Deicing fluid

18. Which weather instrument is used to measure wind speed?

a. Anemometer

19. Which two weather instruments are used to collect humidity data?

a. Psychrometer and Hygrometer

20. Which of these aviation weather reports are prepared by the Aviation Weather Center?

a. All of these

21. What is the primary source for preflight weather information called?

a. The Flight Service Station

22. Which of these is a way that pilots can access the FSS information?

a. All of the above

Instrument flight rules are used when the ceiling is less than _____ feet and visibility is less than three miles.

a. 1,000

Which type of flight rules should be followed when the ceiling is greater than 3,000 feet or there is no ceiling, with visibility greater than 5 miles?

a. Visual Flight Rules

25. Which type of rating allows a pilot to fly in IFR conditions?

a. Instrument Rating

26. What is one of the greatest dangers of cold weather flying?

a. Icing.

27. The most common type of ice, which appears white is called?

Rime

28. What happens when ice builds up on the wings of an aircraft?

a. The weight increases and lift decreases.

29. What technology do many airports have to detect microbursts at ground level?

a. Low Level Wind Shear Alert Systems

30. Which of the following makes a dust storm hazardous to aircraft?

a. All of the above

31. Which type of turbulence forms behind an aircraft as it passes through the air?

a. Wake turbulence

32. Which type of turbulence is associated with strong wind shears in the jet stream?

a. Clear air turbulence

Which type of turbulence occurs when air near the surface changes directions as it flows over or around obstructions?

a. Mechanical turbulence

Which type of turbulence is caused by stationary turbulent eddies that are found downwind from mountain ridges?

a. Mountain wave turbulence

35. Which of the following should a pilot do if they encounter turbulence?

a. Contact ATC to warn other aircraft and possibly request an altitude change to escape the turbulence.