ADS Revision Quiz (Part 2)

In ARINC 429 data words, which field is used to indicate the type of data being transmitted?

• Data

• Label

• SSM

Between each ARINC 429 word, there is a gap consisting of __________.

• 4 logic 1a

• 4 null bits

• 4 logic 0s

In an aircraft, data between avionics systems is transferred through __________ buses.

• address

• data

• memory

The method used to manage access to a shared bus and prevent contention is called:

• bus arbitration

• queuing

• buffering

In AFDX networks, deterministic communication refers to:

• Predictable timing of message delivery within a fixed time limit

• Data packets always arriving in the same order sent

• Routing adjusted in real time to avoid congestion

What is the primary reason fibre optic cables are preferred over copper for avionics data links?

• Lower installation cost

• Ability to carry power with data

• Immunity to EMI

Compared to a multi-mode fibre optic cable, a single-mode fibre has a/an __________ core diameter.

• larger

• smaller

• equal

In optical communication systems, bending the fibre optic cable beyond its minimum radius is most likely to cause:

• electrical interference

• incorrect grounding

• signal attenuation

You never look directly into the end of a fibre optic cable.

• True

• False

If light strikes a glass–air boundary at an angle less than the critical angle, it will:

• Refract into the air

• Travel along the boundary

• Reflect back into the glass