Module 7.7 Flashcards
what is continuity testing ?
checking that an electrical system is connected and servicable
when continuity testing why must the power be off?
damage can be caused when measuring the system or to the multimeter or aircraft system.
what should the meter be set to if the resistance is unknown?
highest setting then work down
what will a multimeter need in an open circuit?
1 or 1/2
Ain’t got a scooby
what must be known on a continuity test?
the expected reading
what should be done with parallel components?
isolate them
what should be done before a continuity test?
visual inspection
what two parts of info does a continuity test provide?
that there is an electrical link and the resistance of said link
on an aircraft, how could continuity test be conducted?
connecting to the airframe structure
on an analogue multimeter, what do they not require?
no battery, ohm requires it
why does a megger have a higher voltage than the system?
test at 3x the working voltage
what should be done to an LRU before insulation tests?
disconnect to the LRU
what does good bonding allow?
safe path for current flow
what resistance should a bonding check produce?
less than 0.05 ohm for primary, 0.02 ohm for comms and nav
what does bonding protect from?
static build up
what does good bonding allow?
ensures safety of aircraft and occupants
where would the master point be?
avionics bay. one for AC one for DC
where would dual grounding cables be used and why?
fuel tanks for resistance
what must never be done after stripping a wire?
touching it with your fingers
what are the most common types of electrical tooling?
Daniels(pins and sockets) and AMP/PIDG
how can a crimp be checked?
go/no go gauges
where would all standard electrical practices be found?
chapter 20
how long should the wire be stripped for the PIDG crimp?
half the barrel + 1/32
how much wire should protude from a crimp and why?
1/32
