Measurements of Air Data Parameters 2 Flashcards
An aeroplane is cruising at FL 220. The auto-throttle maintains a constant CAS. If the OAT decreases, the Mach number:
remains constant.
An aeroplane is cruising at FL 190. The auto-throttle maintains a constant CAS. If the OAT decreases, the Mach number:
remains constant.
An aeroplane is in steady descent. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
decreases.
The FMS provides the following functions: 1- vertical flight plan management 2- fuel management 3- lateral flight plan management 4- terrain awareness and warning The combination which regroups all of the correct statements is:
1, 2, 3.
An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature increases, the Mach number:
remains constant.
An aeroplane is in steady cruise at flight level 270. The auto-throttle maintains a constant calibrated airspeed. If the static air temperature decreases, the Mach number:
remains constant.
An aeroplane is in steady climb. The auto-throttle maintains a constant calibrated airspeed. If the total temperature remains constant, the Mach number:
increases.
When descending at a constant CAS through an isothermal layer, the Mach number:
decreases.
When climbing at a constant CAS through an isothermal layer, the Mach number:
increases.
The vertical speed indicator (VSI) is fed by:
static pressure
The operating principle of the vertical speed indicator (VSI) is based on the measurement of the rate of change of:
static pressure
An air data computer: 1. supplies the ground speed and the drift (angle) 2. determines the total temperature and the true altitude 3. receives the static pressure and the total pressure 4. supplies the true airspeed to the inertial unit 5. determines the Mach number, the outside (static) air temperature The combination regrouping all the correct statements is:
3, 4 and 5
An aircraft is descending from FL 390 to ground level at maximum speed. The limits in speed will be:
initially the MMO, then the VMO below a certain flight level.
An airspeed indicator displays:
IAS.
At a given altitude, the hysteresis error of an altimeter varies substantially with the:
time passed at this altitude.
Below the tropopause, when descending at a constant CAS:
Mach number decreases and the velocity of sound increases.
The CAS is obtained from IAS by correcting for the following errors: 1 - position 2 - compressibility 3 - instrument 4 - density The combination regrouping all the correct statements is:
1, 3.
CAS is equal to:
IAS corrected for position and instrument errors.
Concerning the airspeed indicator, IAS is:
the indicated reading on the instrument.
Considering a flight director of the “command bars” type: 1 - the vertical bar is always associated with the roll channel 2 - the vertical bar may be associated with the pitch channel 3 - the horizontal bar may be associated with the roll channel 4 - the horizontal bar is always associated with the pitch channel The combination regrouping all the correct statements is:
1, 4.
Considering an airspeed indicator, a second stripped needle, if installed, indicates:
maximum operating speed (VMO ).
Considering the relationship between CAS and EAS:
EAS is always lower than or equal to CAS.
Due to its conception, the altimeter measures a:
pressure altitude
During a category III automatic approach, the position signals in the vertical plane under 200 ft are based on:
a radio altimeter.
