7.7 Flashcards
What are the 3 types of testing
Continuity, insulation and bonding
What is continuity testing?
That there is a link between two or more points in a circuit
A resistance link
When reading unknown resistance with a multimeter?
Set the resistance unit to the highest setting before testing and go down till reading is accurate
If resistors are in parallel when area increase resistance decreases what is the total resistance between a 100 ohm and 10 ohm resistor?
Less than 10
What should you do to a live circuit before continuity testing?
Disconnect power
What test should you do before Continuity tests?
Visual inspections
What is ohms law
1 volt to push 1 amp through 1 ohm
What are the 2 types of multimeter?
Analogue and digital
What are the advantages of an analogue multimeter?
See fluctuations on the needle and no battery required
What are the disadvantages of an Analogue multimeter?
Mistakes can be made usually larger and limited on what you can read
What voltage is used to test insulation resistance on aircraft?
250V to 300V
What is bonding for components in aircraft?
Transferring current flow in a safe path between parts
What is good bonding do on an aircraft?
Prevents radio interference
Where does static build up on an aircraft?
Leading edge on wings and nose
If everything is bonded on an aircraft correctly what should be the same overall?
Potential Difference
What unit is bonding tested primarily on for readings?
The master bonding point
Where is the main bonding point usually located in?
Normally in the avionics bay
If a cable is snagged or twisted after striping damaged what should you do?
Cut it off or start again
What are the 3 main crimp tools?
Daniel’s, Mini Daniel’s and AMP (T Head)
What code cable is Airbus and Boeing?
Airbus- ESPM
Boeing- SWPM
What do you used to make sure your using the correct turret and tool with the pin and socket?
A chart will be with all of them to make sure you use the correct one
What is the advantage of ASP terminal lugs (red thing with the hoop)
(4 advantages)
Good conductivity
Uniform
Strong connection
Corrosion proof
On AMP Terminal Lugs how many can you have on 1 terminal and what order for having 3 on 1 terminal?
Up to 4
Face down, face up, spacer, face down
What code should be on a AMP Terminal Lug?
A dot code
When striping a cable how much should you strip?
Half the length of the barrel + 1/32 of a inch
Where are in line sealed splices used?
Areas exposed to the environment like the flaps