11.19 Integrated Modular Avionics

Question 1

Which domain in the Airbus AFDX system includes electrical systems?
A) Power
B) Energy
C) Utilities

Answer 1

B) Energy

Question 2

What does the ‘Power’ domain in the Airbus AFDX system include?
A) Electrical systems
B) Landing gear functions
C) Engine functionality

Answer 2

C) Engine functionality

Question 3

Which component hosts multiple software functions and provides I/O interface services in the Airbus system?
A) RDC
B) CPIOM
C) ACS

Answer 3

B) CPIOM

Question 4

What communication network do CPIOMs and IOMs use?
A) ARINC 429
B) ADCN
C) MIL-STD-1553

Answer 4

B) ADCN

Question 5

Which component in the Boeing 787 hosts flight management, lighting, and data communication applications?
A) RDC
B) GPM
C) ARS

Answer 5

B) GPM

Question 6

Which network is used between CCR, LRUs, and RDCs on the Boeing 787?
A) ARINC 429
B) Common Data Network (CDN)
C) ADCN

Answer 6

B) Common Data Network (CDN)

Question 7

Which bus systems can RDCs convert data into?
A) Fibre optic only
B) Only ARINC 664
C) CAN, ARINC 429, analogue, and discrete

Answer 7

C) CAN, ARINC 429, analogue, and discrete

Question 8

What is the role of a Virtual LRU in IMA architecture?
A) Replaces sensors and effectors
B) Acts as a backup for ARINC switches
C) Replaces physical LRUs by hosting their functionality

Answer 8

C) Replaces physical LRUs by hosting their functionality

Question 9

What standard is AFDX based on?
A) IEEE 802.11
B) IEEE 802.3
C) ARINC 429

Answer 9

B) IEEE 802.3

Question 10

Which protocol does Boeing use on the 787 with some extensions?
A) ARINC 429
B) ARINC 664
C) MIL-STD-1553

Answer 10

B) ARINC 664

Question 11

What is the maximum bandwidth of ARINC 429?
A) 2 Mbps
B) 1 Mbps
C) 100 kbps

Answer 11

C) 100 kbps

Question 12

What ensures deterministic behaviour in AFDX networks?
A) VLAN tagging
B) Controlled Virtual Links
C) Redundant GPMs

Answer 12

B) Controlled Virtual Links

Question 13

Which component performs data validity checking in AFDX networks?
A) RDC
B) CPIOM
C) AFDX switches

Answer 13

C) AFDX switches

Question 14

What is the purpose of twin channels in AFDX?
A) Increase speed
B) Provide data redundancy
C) Add more bandwidth

Answer 14

B) Provide data redundancy

Question 15

What is the maximum AFDX frame size defined by Lmax?
A) 512 bytes
B) 1518 bytes
C) 2048 bytes

Answer 15

B) 1518 bytes

Question 16

Which parameter defines how frequently data is sent on a Virtual Link?
A) VL ID
B) Lmax
C) BAG

Answer 16

C) BAG

Question 17

A Virtual Link (VL) in AFDX is:
A) Bi-directional with multiple transmitters
B) Unidirectional with one transmitter and one or more receivers
C) Randomised and dynamic in routing

Answer 17

B) Unidirectional with one transmitter and one or more receivers

Question 18

What does the Integrated Modular Avionics (IMA) architecture replace in commercial airliners?
A) Separate processors and Line Replaceable Units (LRUs)
B) Only the wiring systems
C) Only the communication networks

Answer 18

A) Separate processors and Line Replaceable Units (LRUs)

Question 19

Which aircraft was the first to implement a federated digital architecture?
A) Boeing 777
B) Boeing 757
C) Airbus A320

Answer 19

B) Boeing 757

Question 20

Which aircraft transitioned from federated avionics architecture to an IMA architecture with the introduction of the Airplane Information Management System (AIMS)?
A) Boeing 767
B) Boeing 777
C) Airbus A320

Answer 20

B) Boeing 777

Question 21

Which is NOT an advantage of Integrated Modular Avionics (IMA)?
A) Reduced weight
B) Increased size
C) Easier modification

Answer 21

B) Increased size

Question 22

What does the Loadable Software Aircraft Parts (LSAPs) system do in the IMA system?
A) Provides power to all modules
B) Loads system software onto servers for aircraft configuration
C) Manages communication between modules

Answer 22

B) Loads system software onto servers for aircraft configuration

Question 23

Which of the following is a typical function integrated into the IMA modules?
A) Hydraulic system management
B) Fuel management
C) Engine noise reduction

Answer 23

B) Fuel management

Question 24

What is the primary benefit of using IMA compared to federated avionics?
A) Increased physical separation of subsystems
B) Integration of multiple functions into fewer centralised processing units
C) Reduced software compatibility

Answer 24

B) Integration of multiple functions into fewer centralised processing units

Question 25

What type of network does Airbus use for avionics communication in the IMA system? A) ARINC 664 B) Ethernet C) CAN bus

Answer 25

A) ARINC 664

Question 26

What is the function of an Aircraft Data Network (ADN)? A) To manage the aircraft’s electrical systems B) To transfer data between various subscribers like computers and LRUs C) To provide power to avionics systems

Answer 26

B) To transfer data between various subscribers like computers and LRUs

Question 27

What is the primary feature of AFDX? A) It uses a conventional Ethernet without modifications B) It is based on IEEE 802.3 and ensures deterministic data transfer C) It is not used in avionics systems

Answer 27

B) It is based on IEEE 802.3 and ensures deterministic data transfer

Question 28

Which software specification allows the hosting of multiple applications of different software levels on the same hardware in IMA? A) ARINC 429 B) ARINC 653 C) ARINC 664

Answer 28

B) ARINC 653

Question 29

In the IMA system, what is the primary role of the Virtual Link (VL)? A) To connect the end systems to external networks B) To define the unidirectional communication path for data transfer C) To route data between AFDX switches and modules

Answer 29

B) To define the unidirectional communication path for data transfer

Question 30

What is the key feature of Deterministic Ethernet in the context of avionics systems? A) It enables real-time communication with predictable latency B) It uses wireless transmission for data exchange C) It reduces the number of physical connections between devices

Answer 30

A) It enables real-time communication with predictable latency

Question 31

What is the maximum weight reduction achieved in the avionics suite of the Boeing 787 by using IMA? A) 907 kg (2000 lbs) B) 1500 kg (3300 lbs) C) 500 kg (1100 lbs)

Answer 31

A) 907 kg (2000 lbs)

Question 32

What term is used by Airbus for the processing modules used in their IMA architecture? A) GPM B) CPIOM C) RDC

Answer 32

B) CPIOM

Question 33

Which system in the Airbus A380 uses eight processing modules, including seven CPIOMs and one IOM? A) IMA system B) ARINC 664 network C) Centralized avionics suite

Answer 33

A) IMA system

Question 34

In Boeing’s IMA architecture, what is the central computing system called? A) Common Core System (CCS) B) General Processing Module (GPM) C) Remote Data Concentrator (RDC)

Answer 34

A) Common Core System (CCS)

Question 35

What is the purpose of a Remote Data Concentrator (RDC) in the IMA system? A) To host software applications B) To connect end systems with the ARINC 664 network and other data buses C) To manage power distribution

Answer 35

B) To connect end systems with the ARINC 664 network and other data buses

Question 36

What is the Bandwidth Allocation Gap (BAG) used for in IMA systems? A) To ensure a gap between two consecutive frames for deterministic behavior B) To divide the available bandwidth equally among all devices C) To separate different data types on the network

Answer 36

A) To ensure a gap between two consecutive frames for deterministic behavior

Question 37

What is the main purpose of the General Processor Module (GPM) in the CCS system? A) To provide the physical network infrastructure for the system B) To host common core software and provide partitioned environment services C) To interface with external LRUs using ARINC 429 and CAN protocols

Answer 37

B) To host common core software and provide partitioned environment services

Question 38

Which protocol network does the Common Communication System (CCS) use as its communication backbone? A) ARINC 653 B) ARINC 664 Part 7 C) AFDX

Answer 38

B) ARINC 664 Part 7

Question 39

What is the function of the CDN Virtual Links (VLs)? A) They connect the GPMs to external LRUs B) They route data packets from one data publisher to one or more subscribers C) They provide redundant power to the modules

Answer 39

B) They route data packets from one data publisher to one or more subscribers

Question 40

How is the data partitioned within the CDN? A) Using ARINC 429 signals B) Using Virtual Links (VLs) C) Using copper wire connections

Answer 40

B) Using Virtual Links (VLs)

Question 41

Which of the following is NOT a standard module in the Common Computing Resource (CCR)? A) General Processor Module (GPM) B) ARINC 664 Cabinet Switch (ACS) C) Fuel Data Concentrator (FDC)

Answer 41

C) Fuel Data Concentrator (FDC)

Question 42

What does the ARINC 653 interface enable for the Hosted Application (HA)? A) It enables the application to run on a federated system B) It provides a robust partitioned environment for multiple independent applications C) It connects external LRUs to the CCS system

Answer 42

B) It provides a robust partitioned environment for multiple independent applications

Question 43

What is the role of the Fibre Optic Translator (FOX) in the CCR? A) To route data within the GPM B) To convert between electrical and optical signals for the CDN C) To provide power to the modules in the CCR cabinet

Answer 43

B) To convert between electrical and optical signals for the CDN

Question 44

Which module in the CCR is responsible for converting aircraft power to regulated power for the other modules? A) Power Conditioning Module (PCM) B) General Processor Module (GPM) C) Fibre Optic Translator (FOX)

Answer 44

A) Power Conditioning Module (PCM)

Question 45

What does the Remote Data Concentrator (RDC) interface with? A) Only AFDX switches B) Only ARINC 429 busses C) A variety of analogue, CAN, ARINC 429, and discrete systems

Answer 45

C) A variety of analogue, CAN, ARINC 429, and discrete systems

Question 46

What is the primary function of the Application Specific Modules (ASMs) in the CCR? A) To perform power conditioning B) To provide specific functionality not provided by standard modules C) To communicate with external LRUs through the CDN

Answer 46

B) To provide specific functionality not provided by standard modules

Question 47

How does the RDC contribute to reducing aircraft weight and cost? A) By eliminating the need for redundant systems B) By reducing the amount of wiring and hardware required C) By providing power to the LRUs

Answer 47

B) By reducing the amount of wiring and hardware required

Question 48

In the Mirror I/O Module Principle, what happens if one IOM fails? A) The LRU communication with the ADCN is lost B) Communication is maintained through the mirror IOM C) The system automatically shuts down

Answer 48

B) Communication is maintained through the mirror IOM

Question 49

Which of the following is a function of the I/O Module (IOM) on Airbus systems? A) To control the in-tank equipment B) To interface with external LRUs and convert non-AFDX data to AFDX format C) To provide computing resources to the Hosted Application

Answer 49

B) To interface with external LRUs and convert non-AFDX data to AFDX format

Question 50

What does the AFDX switch use to route data? A) Predefined paths known as Virtual Links (VLs) B) Randomized paths to avoid congestion C) A fixed point-to-point connection scheme

Answer 50

A) Predefined paths known as Virtual Links (VLs)

Question 51

What type of failure can occur during normal operation of the AFDX network? A) Single AFDX Switch Loss B) Overload of all AFDX switches C) Complete system shutdown

Answer 51

A) Single AFDX Switch Loss

Question 52

What is the primary role of the RDC in Boeing systems? A) To act as a power source for external systems B) To convert non-ARINC 664 signals to ARINC 664 and vice versa C) To manage all network communications within the CCS

Answer 52

B) To convert non-ARINC 664 signals to ARINC 664 and vice versa

Question 53

What is the architecture of the Fuel Measurement and Management System (FMMS) on the Airbus A380? A) It uses a centralized processing unit for all system functions B) It uses a pair of CPIOMs in a redundant configuration C) It operates on a federated system with independent LRUs

Answer 53

B) It uses a pair of CPIOMs in a redundant configuration

Question 54

In the Fuel Measurement and Management System (FMMS), what happens when the health of the primary CPIOM lane deteriorates? A) The system shuts down to avoid malfunction B) Control switches to the standby CPIOM lane C) The system continues to operate with degraded performance

Answer 54

B) Control switches to the standby CPIOM lane

Question 55

What is the purpose of the CPIOM software partitioning in the FMMS on the Airbus A380? A) To control external communication with the CDN B) To enable primary and standby lanes for fault tolerance C) To manage power distribution between modules

Answer 55

B) To enable primary and standby lanes for fault tolerance

Question 56

Which of the following components of the I/O Module is responsible for exchanging AFDX data with the ADCN? A) Power supply board B) AFDX ES board C) Inputs/outputs boards

Answer 56

B) AFDX ES board

Question 57

What is the main difference between traditional avionics systems and Integrated Modular Avionics (IMA) systems? A) Traditional systems are based on a federated architecture, while IMA systems use shared hardware for multiple subsystems. B) Traditional systems use a shared hardware approach for all subsystems, while IMA systems use separate hardware. C) Traditional systems have fewer components than IMA systems.

Answer 57

A) Traditional systems are based on a federated architecture, while IMA systems use shared hardware for multiple subsystems

Question 58

What are the two main types of IMA systems? A) Airbus AFDX and Boeing IMA B) Boeing CCS and Airbus AFDX C) Boeing AFDX and Airbus CCS

Answer 58

B) Boeing CCS and Airbus AFDX

Question 59

What term does Airbus use for the core processing input/output modules in their IMA system? A) General Processing Module (GPM) B) Core Processing Module (CPM) C) Core Processing Input/Output Module (CPIOM)

Answer 59

C) Core Processing Input/Output Module (CPIOM)

Question 60

How many types of CPIOM are there in the Airbus IMA system? A) 5 B) 6 C) 7

Answer 60

C) 7

Question 61

What is the primary function of CPIOM-A in the Airbus IMA system? A) Fuel applications B) Pneumatic and optional air conditioning applications C) Cockpit and flight controls applications

Answer 61

B) Pneumatic and optional air conditioning applications

Question 62

Which CPIOM hosts the air conditioning applications in the Airbus IMA system? A) CPIOM-A B) CPIOM-B C) CPIOM-C

Answer 62

B) CPIOM-B

Question 63

In the Airbus IMA system, what applications are hosted by CPIOM-F? A) Fuel applications B) Cockpit and flight controls applications C) Data link applications

Answer 63

A) Fuel applications

Question 64

In the Boeing CCS system, what are hosted functions (HFs)? A) Critical and non-critical software applications B) Applications for air traffic control C) Modules that control communication protocols

Answer 64

A) Critical and non-critical software applications

Question 65

How does the Boeing CCS system ensure isolation and independence between hosted functions? A) By using software partitioning to separate critical and non-critical applications B) By assigning each hosted function to a separate physical processor C) By limiting the number of hosted functions per system

Answer 65

A) By using software partitioning to separate critical and non-critical applications

Question 66

What is the role of Remote Data Concentrators (RDCs) in the Boeing CCS system? A) To process and store data from the aircraft’s sensors B) To change data formats between different communication protocols C) To host critical software applications

Answer 66

B) To change data formats between different communication protocols

Question 67

What is the purpose of the Fibre Optic Translator (FOX) modules in the Boeing CCS system? A) To convert light signals to electrical signals for communication B) To convert electrical signals to light signals to reduce electromagnetic interference C) To monitor the performance of the general processing modules

Answer 67

B) To convert electrical signals to light signals to reduce electromagnetic interference

Question 68

How many RDCs are there in the Boeing CCS system? A) 10 B) 16 C) 21

Answer 68

C) 21

Question 69

What is the Common Data Network (CDN) in the Boeing CCS system responsible for? A) Providing a data highway for communication between system elements B) Hosting critical software applications C) Managing the aircraft’s communication systems

Answer 69

A) Providing a data highway for communication between system elements

Question 70

What does the Boeing CCS use to manage fault isolation and independence between hosted functions? A) Hardware-based partitioning B) Software partitioning C) Physical separation of critical systems

Answer 70

B) Software partitioning

Question 71

In the Boeing CCS system, which component is responsible for interfacing between the system and aircraft sensors or systems? A) General Processing Modules (GPMs) B) Remote Data Concentrators (RDCs) C) Common Computing Resources (CCR) cabinets

Answer 71

B) Remote Data Concentrators (RDCs)

Question 72

What is STAR topology A) A STAR topology connected system connects to a hosted function B) A STAR topology connected system connects to a modem C) A STAR topology connected system connects to a hub

Answer 72

C) A STAR topology connected system connects to a hub

Question 73

How many GPMs does the CCS system have? A) 6 B) 16 C) 10

Answer 73

B) 16

Question 74

What type of system does a CPIOM type A hosts? A) Cockpit and flight controls application B) Pneumatic and optional air conditioning applications C) Air conditioning applications

Answer 74

B) Pneumatic and optional air conditioning applications