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1. What is the altimeter? - ANSWER It measures the aircraft's altitude and is
part of the pitot-static system.
- Indications are based on the mean sea level (MSL)
-Change the Kollsman window to compensation for changes in local pressure.
-Indicated altitude changes about 1,000 feet for every inch of change in the
setting.
-Altimeter settings are accurate only in the vicinity of the reporting station.
2. What do the dials on the altimeter mean? - ANSWER The longer of the two
needles indicates multiples of 100 feet.
The shorter of the two needles indicates multiples of 1,000 feet
The pointer indicates multiples of 10,000 feet
- A crosshatched area appears at altitudes below 10,000 feet MSL
3. What is the Kollsman window? - ANSWER The altimeter setting window.
Turn the know to a higher setting increases the indicated altitude. Changes 1,000
feet for every inch of change in the setting.
4. What are the 6 main types of altitude? - ANSWER Indicated altitude
,Pressure altitude
Density altitude
True altitude
Absolute altitude
Calibrated altitude
5. Indicated Altitude - ANSWER The altitude measured by the altimeter, the
altitude used most often during flight.
6. Pressure altitude - ANSWER The height above the standard datum plane.
The standard datum plane is a theoretical reference point at sea level where
pressure is 29.92 of mercury.
Used to compute density altitude, true altitude, true airspeed and other
performance data
7. Density Altitude - ANSWER Pressure altitude corrected for temperature.
When conditions are standard, Density and Pressure altitude are the same.
If temp is higher, the density altitude is higher than pressure altitude
If the temp is lower, density altitude is lower than pressure altitude
It is important because it's directly related to aircraft performance.
8. True altitude - ANSWER The vertical distance above the mean sea level.
,9. Absolute altitude - ANSWER The actual height of the aircraft above the
earth's surface, commonly referred to as height AGL.
It varies based on the height of the surface over which the aircraft is flying.
10. What are three conditions that can cause a false altimeter indications -
ANSWER 1. Failing to keep the altimeter set
2. Flying from high pressure to low pressure
3. Not monitoring the temperature
11. What is the ISA standard atmospheric pressure at sea level - ANSWER 14.7
lb
29.92 inches of mercury
-Standard pressure lapse rate is 1 inch of mercury (hg) per 1000 feet
12. What is the ISA standard atmospheric temperature at sea level - ANSWER
59 degrees f
- Standard temperature lapse rate is 2 degrees for every 1,000 ft
13. What is the vertical speed indicator (VSI)? - ANSWER Part of the pitot-
static system
- Static pressure
- Measures rate at which an aircraft gains and loses altitude
- Indicates 0 when you're flying level
- Displays trend and rate
, 14. What are the most common instruments that contain gyroscopes - ANSWER
Turn coordinator
Heading indicator
Attitude indicator
15. What are the properties of rigidity in space? - ANSWER - Tends to remain
rigid
- Resists external forces
- Fixed position in space
What effects does precession have on gyroscopic instruments - ANSWER
Precession is the tilting or turning of a gyro in response to pressure.
Causes:
- Slow drifting and minor error indications
- Reaction in the direction of rotation
What is the turn coordinator? - ANSWER It indicates turn direction and
quality of the turn.
Also, serves as a backup source of bank information in the event of attitude
indicator failure.
Two components: Turn indicator and Inclinometer
What is a standard rate turn? - ANSWER 3 degree per second turn.