CAT Avionics and Electrical Systems 2

Question 1

What is the primary function of an aircraft Auxiliary Power Unit (APU)?

Accepted Answer

Supply electrical power and bleed air when main engines are not running

Answer

Provide supplemental engine thrust during takeoff

Answer

Control hydraulic system pressure on the ground

Answer

Power the landing gear extension system

Question 2

In avionics maintenance, what does the acronym BITE stand for?

Accepted Answer

Built-In Test Equipment

Answer

Basic Instrument Testing Environment

Answer

Binary Interface Transfer Equipment

Answer

Built-In Troubleshooting Engine

Question 3

Which wire insulation material is most commonly used in aircraft applications for its high-temperature resistance and low flammability?

Accepted Answer

PTFE (Polytetrafluoroethylene/Teflon)

Answer

PVC (Polyvinyl Chloride)

Answer

Rubber

Answer

Nylon

Question 4

What is the function of a Bus Tie Breaker (BTB) in an aircraft AC electrical system?

Accepted Answer

Interconnect multiple AC buses or isolate a faulted bus from the network

Answer

Connect individual loads directly to generator output

Answer

Convert three-phase AC to single-phase AC

Answer

Regulate output voltage from the Integrated Drive Generator

Question 5

Which avionics system specifically warns flight crews of potential Controlled Flight Into Terrain (CFIT)?

Accepted Answer

TAWS/GPWS (Terrain Awareness and Warning System / Ground Proximity Warning System)

Answer

TCAS (Traffic Collision Avoidance System)

Answer

ACARS (Aircraft Communications Addressing and Reporting System)

Answer

SELCAL (Selective Calling System)

Question 6

What does the military specification MIL-W-22759 govern in aerospace applications?

Accepted Answer

Flexible hookup wire for aerospace and military use

Answer

Military aviation hydraulic fluid lines

Answer

Structural fastener installation procedures

Answer

Aircraft hydraulic tubing dimensions

Question 7

What does Fly-by-Wire (FBW) technology replace in conventional aircraft flight control systems?

Accepted Answer

Mechanical cables and linkages with electronic signal transmission to actuators

Answer

Hydraulic fluid with compressed air actuators

Answer

Analog cockpit instruments with digital displays

Answer

Autopilot systems with manual control inputs