TRUE ALTITUDE CALCULATIONS

Question 1

INDICATED ALTITUDE

Answer 1

Indicated altitude – the altitude shown on the altimeter.

IT MAY NOT BE CORRECT IF YOU ARE GOING FROM LOW PRESSURE, OR COLD TO HIGH PRESSURE OR HOT.

Question 2

ABSOLUTE ALTITUDE

Answer 2

Absolute altitude – altitude in terms of the distance above the ground directly below

Question 3

TRUE ALTITUDE

Answer 3

True altitude – altitude in terms of elevation above sea level.
THAT IS THE ACTUALLY ALTITUDE YOU ARE AT. IT IS TRUE NOT LYING LIKE THE INDICATED ALTITUDE WICH LIES WHEN YOU GO FROM HOT TO COLD.

Question 4

Height

Answer 4

Height – vertical distance above a certain point

Pressure altitude – the air pressure in terms of altitude in the International Standard Atmosphere

Question 5

PRESSURE ALTITIUDE

Answer 5

Pressure altitude – the air pressure in terms of altitude in the International Standard Atmosphere
29.92

Question 6

Density altitude

Answer 6

Density altitude – the density of the air in terms of altitude in the International Standard Atmosphere in the air.

Question 7

FROM LOW PRESSURE 29.63 TO HIGH PRESSURE 30.52 TRUE ALTITUDE WIL BE HIGH THAN. ____________

Answer 7

INDICATED WILL BE LOWER

BY ABOUT 890 FT.

Question 8

COLD OR LOW PRESSURE THE TRUE ALTITUDE WILL BE ____________ THAN INDICATED.

Answer 8

LOWER

Question 9

WARM OR HIGH PRESSURE TRUE ALTITUDE WILL BE________ THAN INDICATED

Answer 9

HIGHER

Question 10

HIGH TO LOW LOOK OUT __________.

HOT TO COLD LOOK OUT __________.

Answer 10

BELOW
BELOW
TRUE ALTITUDE STAYS THE SAME BUT YOU THINKE YOU ARE HIGHER
INDICATED ALTIMETER YOU WILL READ HIGH, SO THE PILOT WILL FLY LOWER (AT THE TRUE ALTITUDE).

Question 11

FROM HIGH PRESSURE 30.52 TO LOW PRESSURE 29.63 TRUE ALTITUDE WILL BE LOWER. __________________

Answer 11

INDICATED ALTITUDE WILL BE HIGHER
LOOK OUT BELOW, YOU ARE INDICATING A HIGHER ALTITUDE BUT YOUR TRUE ALTITUDE IS LOW.
BY ABOUT 890 FT.

Question 12

When the Temp is -20C at 15,000 you know that?

1. The altimeter is indicating higher than True Alt
2. Lower than True Alt
3. Absolute altimeter

Answer 12

= the altimeter is indicating higher than True Alt
15 X 2 = 30
30 - 15 (Standard Temp) = 15C
15C is the Standard Temp at 15,000
-20 C is colder. High to low look out below.

Question 13

You depart from Memphis with a correct altimeter setting of 29.92 in. Hg., and fly to Bogota, Colombia airport (elevation 8,300 feet). The local altimeter setting at Bogota is 30.02. If the altimeter was not reset to 30.02, upon landing the altimeter would read:
  Airport elevation
  8,200 feet
  8,290 feet
  8,400 feet

Answer 13

8,200 feet

Question 14

You are flying from Miami, Florida to Toronto, Canada during the winter months. The temperature during landing at Toronto is colder than standard. If you forget to set the local altimeter setting:
The temperature has no effect on the pressure changes
The airplane will be lower than the indicated altitude
The temperature has no effect on the altimeter
The airplane will be higher than the indicated altitude

Answer 14

The airplane will be lower than the indicated altitude

Question 15

You mistakenly set 29.35 instead of 29.85, what is your altitude difference?
  300 ft low.
  500 ft low.
  300 ft high.
  500 feet high.

Answer 15

500 feet high.
.1 inHg Change = 100 feet. The erroneous setting of 29.35 would reduce your altitude by 500 feet causing to you fly the assigned altitude at an actual altitude 500 feet higher. Go here and play around with it. When you are at 1000 feet and have 29.85 set your at about 1000 feet. When you put 29.35 in your altitude is now 500 feet. So flying 1000 feet with 29.35 set would have you at 1500feet actual altitude.

Question 16

If you adjust your altimeter from 30.10 to 29.10 what difference would this make on the altimeter?

Answer 16

If you move your altimeter down, your indicated altitude moves down so adjusting an altimeter from 30.10 to 29.10 would move your altimeter from say 5,800’ to 4,800’

Question 17

Moving your altimeter from 30.00 to 30.10 would do what?

Answer 17

This would increase your indicated altitude by 100 feet

Question 18

You depart from Memphis with a correct altimeter setting of 29.92 in. Hg., and fly to Bogota, Colombia airport (elevation 8,300 feet). The local altimeter setting at Bogota is 30.02. If the altimeter was not reset to 30.02, upon landing the altimeter would read:
  8,400 feet
  Airport elevation
  8,200 feet
  8,290 feet

Answer 18

8,200 feet

Question 19

You are flying at 6000’ with a local altimeter of 29.96. The outside air temperature drops 10 degrees, what happened to your true altitude?
You are lower than 6000’.
Your at the same altitude.
Your Higher than 6000’.

Answer 19

You are lower than 6000’.
Correct
High to Low, look out below. Low to high, up in the sky. Works for both pressure and temperature.

Question 20

When the temperature is -20 C at 15,000ft, you know-
Lower than true altitude.
The altimeter is indicating higher than true altitude.
Absolute altimeter.

Answer 20

The altimeter is indicating higher than true altitude.