Results
Q1. The operating frequency of the Radio Altimeter is normally:
between 4,250 and 4,350 MHz, FMCW
Q2. The operation of the radio altimeter of a modern aircraft is based on:
frequency modulation of the carrier wave.
Q3. The aircraft radio equipment which emits on a frequency of 4400 MHz is the :
radio altimeter.
Q4. A radio altimeter can be defined as a:
self-contained on-board aid used to measure the true height of the aircraft
Q5. The Decision Height (DH) warning light comes on when an aircraft:
descends below a pre-set radio altitude.
Q6. During the approach, a crew reads on the radio altimeter the value of 650 ft. This is an indication of the true:
height of the lowest wheels with regard to the ground at any time.
Q7. The data supplied by a radio altimeter:
indicates the distance between the ground and the aircraft.
Q8. For most radio altimeters, when a system error occurs during approach the:
Height indication is removed
Q9. The modulation technique used by the Radio Altimeter is referred to as:
Frequency Modulated Continuous Wave
Q10. In low altitude radio altimeters, the height measurement (above the ground) is based upon:
a frequency modulation wave, for which the frequency variation between the transmitted wave and the received wave after ground reflection is measured.
Q11. The low-altitude radio altimeters used in precision approaches: 1 operate in the 1540-1660 MHz range. 2 are of the pulsed type. 3 are of the frequency modulation type. 4 have an operating range of 0 to 5000 ft. 5 have a precision of +/- 2 feet between 0 and 500 ft. The combination of the correct statements is:
3,5
Q12. In low altitude radio altimeters, the reading is zero when main landing gear wheels are on the ground. For this, it is necessary to:
compensate residual altitude due to antennas height above the ground and coaxial cables length.
Q13. The operating frequency range of a low altitude radio altimeter is:
4200 MHz to 4400 MHz.
Q14. Modern low altitude radioaltimeters emit waves in the following frequency band:
SHF (Super High Frequency).
