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WorksheetsM5.4 Databus Cat B1 and 2
Total questions: 28
Worksheet time: 14mins
What does the term serial data transfer mean?
Data is transferred via one line only, therefore the transfer is very fast.
Data is transferred via one line only, therefore the transfer is slow.
All bits of one word are transferred at the same time, therefore a lot of data can be transferred very quickly.
Which of the following statements is correct regarding ARINC 429?
It is a digital data format. Information is transmitted in series.
It is a digital data format. Information is transmitted in parallel.
It is an analogue data format. Information is transmitted in parallel.
Which is correct about the ARINC 429 databus?
It is designed for duplex operation, it works in both directions.
It is designed for simplex operation, it works in one direction only.
It always connects one data transmitter with only one data receiver.
What is the maximum number of receivers that can be connected to one ARINC 429 transmitter?
10
120
20
32
Select all the different transmittal speeds ARINC 429 has?
100 kBit/s
12-14 kBits/s
1 MBit/s
2MBit/s
1 GBit/s
What does the label of an ARINC 429 word indicate?
The label indicates the content of the data word.
The label determines which system gets this word.
The label indicates the system the word came from.
Which ARINC 429 label is shown below?
261
152
241
162
What is the difference between Binary (BNR) and Binary coded Decimal (BCD) data?
There is no difference.
BCD words are longer.
BCD words are for displays and BNR words are for further calculation.
What is the purpose of the SSM (Sign Status Matrix) in the ARINC 429 data format?
To show the contents of a data word.
To show the state of the transmitter and the sign of the information.
To show the system that receives the data.
What does ARINC 629 support?
A single-transmitter and bi-directional approach to digital data communications
A multi-transmitter and bi-directional approach to digital data communications
A multi-transmitter and uni-directional approach to digital data communications
What are the primary advantages of ARINC 629?
It has fewer wires and can move less data.
It has fewer wires and can move more data.
It has more wires and there carries more cables.
What is the primary function of the ARINC 429 databus?
It is used for transmitting data between avionics systems.
It is used for transmitting data between the aircraft and the ground station.
It is used for transmitting data between the pilot and the air traffic control.
What is the significance of the parity bit in the ARINC 429 data format?
It is used to check the integrity of the data.
It is used to determine the direction of data transmission.
It is used to indicate the end of a data word.
What is the difference between ARINC 429 and ARINC 629?
ARINC 429 supports multi-transmitter and bi-directional data communications, while ARINC 629 supports single-transmitter and bi-directional data communications.
ARINC 429 supports single-transmitter and bi-directional data communications, while ARINC 629 supports multi-transmitter and bi-directional data communications.
ARINC 429 supports single-transmitter and uni-directional data communications, while ARINC 629 supports multi-transmitter and uni-directional data communications.
How are data words separated in ARINC 429?
By a gap (no transmission for a short time; pause)
By a special code
By switching the transmitter off for short periods
In ARINC 429 how can a receiver determine when the next 32-bit word starts?
After a gap of a minimum of 4 bits to 8 bits delay.
Which bits give the Source Destination Identifier of an ARINC 429 word?
Bits 9-10
How many components can be connected to the bus through the inductive bus coupler of the current mode coupler of the ARINC 629 system?
20
120
60
32
What does the term "half-duplex" refer to regarding data exchange?
What sort of Topology does ARINC 429 use?
Point to Point
Basic Ethernet
Switched Ethernet
Ring
which of the following statements is true?
Point to Point is faster than Basic ethernet
Basic Ethernet is uses more wire than Point to Point
It is easier to electrically install new systems into Basic Ethernet
Basic ethernet is a topology where......?
All Line Replaceable Units (LRUs) can use the backbone at the same time in both directions
Only 1 LRU can use the backbone at any time
All LRUs can use the backbone at the same time but only in the same direction
Which technology is used by basic ethernet to prevent data corruption?
Collision Sense carrier Detection
Collision Sense Carrier Access
Carrier Sense Multiple Access
Handshaking Protocol
Which statement is true for Carrier Sense Multiple Access (CSMA)?
Carrier Sense means transfer is carried out when Line Replaceable Unit (LRU) detects it is connected to system
Multiple access means an LRU can transmit onto the network via multiple connections
Carrier Sense means any LRU can communicate with any other LRU on the network
Carrier Sense Multiple Access means that multiple LRUs can transmit and receive on a network at the same time.
How are collisions avoided in a basic ethernet system?
The LRUs listen for a set amount of time before transmitting
The LRUs have allocated time slots
The LRUs listen for a random length of time before transmitting
They aren't as the protocol calls for a message to be resent if acknowledgement isn't received with a defined time frame.
What is a disadvantage of Basic Ethernet?
Transmission waiting time too long with high number of computers
Very slow data speed
Fewer wires than Point to Point
How do Routers/Switches know which LRUs are connected to them?
They have dedicated connectors for each LRU
They are programmed with LRU connection Data
They don't need to know what LRUs are connected
How is the clock information transmitted in ARINC 429?
By an additional line.
Not at all, it is generated inside the receiver.
Within the signal by return to zero encoding.
A synchronisation pulse is sent periodically.
