P5-3 instruments (3.0-3.15) Flashcards
3-3 Pitot, static instruments 3-4 airspeed and airspeed indicator 3-8 Altimeter and altitudes 3-13 gyroscopic instruments Attitude indicator, turn coordinator, heading indicator 3-15 magnetic compass (66 cards)
3-3 what three systems run on the Pitot tube
Altimeter, vertical speed indicator, airspeed indicator
3-3 clogging of the pitot tube will effect instrument(s)
Airspeed
3-4. If the pitot tube becomes clogged what instruments would be affected
Airspeed
If the outside static vents became clogged what instruments would be affected?
Altimeter and vertical speed
3-4 define indicated airspeed (IAS)
The uncorrected reading obtained from the airspeed indicator
3-4 Va
Maneuvering speed
3-4 define calibrated airspeed (CAS)
Indicated airspeed corrected for installation and instrument error
3-4 define True Airspeed (TAS)
calibrated airspeed, corrected for temperature and pressure variations
3-6 Q3012-1 . After takeoff , which airspeed would the pilot use to gain the most altitude in a given period of time ?
A - Vy .
B - Vx
C - VA
A - Vy . Vy ( best rate ) is the calibrated airspeed at which the airplane will obtain the maximum increase in altitude per unit of time ( feet per minute ) after takeoff
P.3-4 what is the yellow arc on the airspeed indicator represent?
A caution which should be avoided unless in smooth air
3-7 What is an important airspeed limitation that not color coded on airspeed indicators ?
A - Never exceed speed .
B - Maximum structural cruising speed .
C - Maneuvering speed .
C - Maneuvering speed .
3-8 An altimeter is divided into what increments on the gauge
20 foot
3-8 indicated altitude
Altitude read on the Altimeter after it is set to current location altimeter settings
3-8 Absolute altitude
Height above the surface
3-8 True altitude
True height above sea level MSL
3-8 Pressure altitude
Height above standard datum plane.
the altitude that is indicated whenever the altimeter setting dial ( Kohlsman window ) is adjusted to 29.92 .
This is the Standard Datum Plane ; a theoretical level where air pressure is equal to 29.92 inches of mercury ( in . Hg ).
The Standard Datum Plane may be above , at , or below sea level .
3-8 Density altitude
the pressure altitude corrected for nonstandard temperature and / or pressure . Rotating the setting knob on the altimeter simultaneously rotates the setting dial and the altimeter hands at a rate of one inch per 1,000 feet of altitude .
Thus , increasing the setting dial from 29.15 to 29.85 would cause the hands of the altimeter to show an increase of 700 feet .
3-8 at what altitude should the altimeter be reset to 29.92
18,000 feet
For altimeter purposes, what is a standard day?
29.92 Hg and 15degrees C
3-8 If a flight is made from an area of low pressure, low temperature to an area of high-pressure high temperature without adjusting the altimeter setting, the altimeter will read lower or higher than the actual altitude above ground level
Lower
3-10 How do variations in temperature affect the altimeter ?
A - Pressure levels are raised on warm days and the indicated altitude is lower than true altitude .
B - Higher temperatures expand the pressure levels and the indicated altitude is higher than true altitude
C - Lower temperatures lower the pressure levels and the indicated altitude is lower than true altitude
A - Pressure levels are raised on warm days and the indicated altitude is lower than true altitude .
On a warm day , the expanded air is lighter than on a cold day , and consequently the pressure levels are raised For example , the pressure level where the altimeter indicates 10,000 feet will be higher on a warm day than under standard conditions . On a cold day the reverse is true .
3-10 What is true altitude ?
A - The vertical distance of the aircraft above sea level True altitude is height above sea level .
Airport terrain and obstacle elevations found on aeronautical charts are true altitudes
3-10 Under what condition will true altitude be lower than indicated altitude ?
A - In colder than standard air temperature .
B - In warmer than standard air temperature .
C - When density altitude is higher than indicated altitude .
A - In colder than standard air temperature .
True altitude will be lower than indicated altitude in colder than standard air temperature , even with an accurate altimeter set to 29.92
3-10 What is pressure altitude
A - The indicated altitude corrected for position and installation error .
B - The altitude indicated when the barometric pressure scale is set to 29.92 .
C - The indicated altitude corrected for nonstandard temperature and pressure . altitude in colder
B - The altitude indicated when the barometric pressure scale is set to 29.92 .