AET Technical Knowledge and Skills 5

Question 1

An Air Data Computer (ADC) develops aircraft airspeed by processing data from which sensor inputs?

Accepted Answer

Pitot (total) pressure and static pressure

Answer

The ADC computes calibrated and true airspeed from the differential between pitot (total) pressure and static pressure, along with temperature for density corrections.

Question 2

An AHRS (Attitude and Heading Reference System) uses which primary sensor technology to measure angular rates?

Accepted Answer

Solid-state ring laser gyroscopes or MEMS gyroscopes

Answer

Modern AHRS units use solid-state ring laser gyroscopes (RLG) or microelectromechanical (MEMS) angular rate sensors, eliminating moving parts found in older mechanical gyro platforms.

Question 3

A radio altimeter (radar altimeter) measures altitude above terrain by:

Accepted Answer

Measuring the time delay of a frequency-modulated continuous wave (FMCW) signal reflected from the ground

Answer

Radio altimeters use FMCW technique — the frequency difference between the transmitted and received signal is proportional to the round-trip time and thus to the height above terrain.

Question 4

ADS-B Out requires aircraft to transmit which data parameters? (Select best answer)

Accepted Answer

GPS-derived position, altitude, velocity, and aircraft identification

Answer

ADS-B Out transmits GPS-derived horizontal position, barometric altitude, velocity vector, and aircraft identification on 1090 MHz Extended Squitter for surveillance by ATC and other aircraft.

Question 5

EGPWS (Enhanced Ground Proximity Warning System) improves on basic GPWS primarily by adding:

Accepted Answer

A worldwide terrain database and GPS position for look-ahead terrain alerting

Answer

EGPWS adds a worldwide digital terrain database correlated with GPS position, enabling look-ahead warnings for terrain that GPWS cannot detect until the aircraft is in immediate danger.

(AET) Aircraft Electronics Technician Practice Test

(AET) Aircraft Electronics Technician Practice Test

AET Technical Knowledge and Skills 5