Upper Level Charts

Question 1

ISA defines altitude as?

Answer 1

When flying at the same indicated altitude, you are flying on a constant pressure surface.

Pressure surfaces rise and fall depending on conditions below.

Question 2

True of False?

Low pressure at the surface raises all the upper pressure surfaces?

Answer 2

False, it lowers them

Question 3

What does warmer and colder than indicated ISA do to pressure surfaces?

Answer 3

Warmer raises the pressure surfaces because the air expands.

Colder lowers the pressure surfaces because the air contracts.

Question 4

If the temperature is colder than ISA, what happens to the pressure surfaces and altimeter reading?

Answer 4

Pressure surfaces lower and the altimeter reads high (aircraft is lower than than indicated).

Question 5

What is caused by the wind effect on an aircraft and is defined as the angle between the heading and track?

Answer 5

Drift

Question 6

Drift to the starboard means your altitude is _______ while drift toward port means _______.

Answer 6

Decreasing and increasing

Question 7

What do Upper Wind Charts provide information on?

Answer 7

Wind speed/ direction and the temperature for various flight levels.

Question 8

What are the following ISA heights ASL?

850 hPa:
700 hPa:
500 hPa:
250 hPa:

Answer 8

850 hPa: 5000ft
700 hPa: 10 000ft
500 hPa: 18 000ft
250 hPa: 34 000ft

Question 9

What projection type are all Upper Air Analysis Charts?

Answer 9

Stereographic

Question 10

Which upper air analysis chart determines position and strength of a jet stream?

Answer 10

250 hPa

Question 11

All analysis charts show the height pattern at a certain pressure level. which ones show the temperature and winds?

Answer 11

500, 700 abd 850 hPa.

Question 12

Which analysis chart can identify presence of upper lows and determine areas of increasing/ decreasing temperature?

Answer 12

500 hPa