Which statement best describes a Line Replaceable Unit (LRU)?

A field-replaceable component for quick maintenance

The purpose of the audio control panel is to:

Route audio to headsets and microphones

What is the purpose of the PA system?

To make passenger announcements to the cabin

Which of the following best describes the purpose of ARINC 429?

Standard for digital data transmission

Why do we wear a wrist strap when working with electronics?

To ground and protect devices from static

What does EFIS stand for?

Electronic Flight Instrument System

Why is shielding used in aircraft audio and communication wiring?

To reduce electromagnetic interference

Why are BITE systems beneficial for maintenance personnel?

They help identify faults and reduce unnecessary LRU replacements

Which statement best describes a Line Replaceable Unit (LRU)?

A field-replaceable component for quick maintenance

What is the function of the interphone or intercom system in an aircraft?

Allow voice communication between crew stations

studbud

Digital and Audio

25 termsStudBud Administration16 plays

Test your knowledge on aviation communication with questions about acronyms, equipment, and terminology used in the industry.

Flashcards25 cardsFPractice quizPHost liveL

Questions 25

Answers

1
Which statement best describes a Line Replaceable Unit (LRU)?
A standardized interface for all flight instruments
A programmable logic gate in digital circuits
A field-replaceable component for quick maintenance
A pressure transducer in the air data system
2
The purpose of the audio control panel is to:
Control transponder functions
Convert analog to digital signals
Route audio to headsets and microphones
Tune radio frequencies
3
What is FADEC primarily used to control?
Engine parameters
Digital intercom settings
Audio distribution
Environmental systems
4
Which system replaced the flight engineer’s monitoring role on many modern jets?
VHF Control Panel
EFIS
EICAS
SELCAL decoder
5
What component in the interphone or intercom system allows the user to initiate transmission?
Volume knob
Trim switch
Push-to-talk switch
Channel tuner
6
What is the purpose of the PA system?
To connect the pilot to the applicable radio
To make public announcements in the terminal
To make passenger announcements to the cabin
To provide communication between flight and ground crew
7
Which system replaced the flight engineer’s monitoring role on many modern jets?
VHF Control Panel
EFIS
SELCAL decoder
EICAS
8
What voltage level is usually considered a logic low in digital systems?
+12V
0V
+5V
-2V
9
Which of the following is a digital aircraft system?
Audio jack
Synchro transducer
ARINC 429
RPM gauge
10
What does BITE stand for?
Built-In Test Equipment
Bus Interface Testing Emulator
Binary Input Terminal Encoder
Broadcast Integrated Test Equipment
11
Which of the following best describes the purpose of ARINC 429?
Standard for digital data transmission
Error detection in analog circuits
Data formatting for radio communications
Power distribution for avionics
12
What component allows pilots to select which radio or intercom channel they are transmitting on?
Audio integration panel
Audio control panel
VHF transceiver
Interphone unit
13
Why do we wear a wrist strap when working with electronics?
To power the circuit
To ground and protect devices from static
To protect you from electric shock
To increase voltage to the circuit
14
What does EFIS stand for?
Emergency Flight Indicator Set
Electronic Flight Instrument System
Engine Fuel Injection System
Enhanced Frequency Identification Software
15
Why is shielding used in aircraft audio and communication wiring?
To simplify the wire layout
To reduce electromagnetic interference
To enhance frequency range
To lower voltage drop
16
What is data transfer called when it’s one bit at a time?
Parallel
Multiplex
Waveform
Serial
17
What does PTT stand for?
Push to talk
Push to transfer
Pull to toggle
Press to transmit
18
Why are BITE systems beneficial for maintenance personnel?
They help identify faults and reduce unnecessary LRU replacements
They reduce flight crew workload during cruise
They eliminate the need for ground support
They calibrate sensors in real-time
19
Can a digital multimeter read ARINC 429 data?
Yes
No
Sometimes
Only if modulated
20
Which statement best describes a Line Replaceable Unit (LRU)?
A pressure transducer in the air data system
A programmable logic gate in digital circuits
A field-replaceable component for quick maintenance
A standardized interface for all flight instruments
21
Which of the following features allows the pilot to preselect a frequency before switching it to active use?
Standby frequency display
Dual-radio antenna
Auto-tune knob
Frequency guard channel
22
What system is primarily used for testing and automated checks in avionics?
Built-In Test Equipment (BITE)
ADF tuner
VOR receiver
DME interrogator
23
The microphone attached to a pilot headset is called a:
Boom mic
Handheld mic
Panel mic
Oxygen mask mic
24
What is the function of the interphone or intercom system in an aircraft?
Provide audio alerts to passengers
Allow voice communication between crew stations
Transmit emergency signals to ground crew
Enable communication between aircraft and ATC
25
What does IC stand for?
Industrial Controller
Inertia Component
Integrated Circuit
Internal Capacitor

Digital and Audio Flashcards | StudBud