5. Digital techniques / Electronic instrument systems - Q&A

PART66Online: Thanks for flagging this - you are right. Fibre optic cable on Airbus aircraft has a purple (violet) outer jacket. The Airbus-qualified fibre cable (ABS0963 / EN 4641-100) is purple, which matches what you saw on the A320neo. This question was originally keyed purple. Earlier this year it was changed to orange during a review, on the basis that orange is the standard fibre colour. That is true for ground telecom cabling (TIA-598 uses orange for multimode and yellow for single-mode fibre), but it is not how fibre is identified in Airbus aircraft wiring, so that change was a mistake. I have moved the correct answer back to purple and rewritten the explanation. The question now also says which aircraft it means, so it no longer implies one colour for every manufacturer: "On Airbus aircraft, fibre optic cable can be identified by its jacket colour, which is" Hands-on checks like yours are the best way we have of catching this kind of thing, so please keep reporting anything that does not match what you see on the aircraft.

Devraj_S: The correct option is C. When the card is removed while still installed, you must sit at the same potential as the aircraft structure the assembly is referenced to, so any static charge bleeds away through a controlled low current path instead of discharging through the sensitive component; bonding only to the assembly leaves both of you floating relative to the airframe. Refer to Module 5.12 electrostatic sensitive devices, where grounding personnel to aircraft structure is the specified precaution.

Matteo Passatempi: the answer A is the correct boolean simbology for the drawing but it's not the equivalent one, so the correct answer is the A

BigPersonalety: In Digital to Analog converters Precision Amplifiers are used to output correct voltages, and not some approximation. Second and third answers are simply false when amplifiers are been discussed

BigPersonalety: After aircraft been affected by HIRF (high intensity radio fields) static wicks have been used to "throw off" the static charge. When this happens, there is a chance that static charge that have been thrown off have been large and thus static charge spark may have been quite large and there is quite large chance that it may have been burned that wick.

BigPersonalety: 2D HEX 2=2 and D=13 first possition from the right is 16^0 (which is 1) so 13*1=13 second possition from the right is 16^1 (which is 16) so 2*16=32 32+13=45

Sokeros: indeed. Thx!

Edga5251: F=15, so 3 is (0011) and 15 is (1111), so full binary number is 00111111, remove (00) from fwd because it is not important and you will get you answer 111 111.

cptjacob: Look up to XOR truth table

cptjacob: No it isn't, discharge occurs when it's difference in electric charge(potential) and then appear flow from bigger to lower potential (discharge) it is called also electricity, dude that is basic knowledge how we have electricity in house and why there lighting storms xd

regiboy: 2 raise to 3 equals 8

raulsburgos: Because is binary, is not lgic represent binary to binary.

PART66Online: Aircraft Communicating Addressing and Reporting System.

JD2016: Thanks. It really is designed to confuse!

g13unisol: this link might help aim-online.com/pdf/OVIEW429.PDF