Electrics (and other) Flashcards
(26 cards)
What does DISS mean?
Direct information system services
Where are hazardous substances disposal instructions found ?
COSHH cabinet COSHH instructions with each substance
What does DTI mean ?
dial test indicator
what is a complete revolution of a DTI ?
1mm
How do you save a warranty write up on ODIS?
long protocol
what does 30 mean on a CFD?
live
what does 15 mean on a CFD?
ignition live even during cranking
what does 75x mean on a CFD?
ignition live except during cranking
what does 31 mean on a CFD?
Earth
How do you diagnose open circuit faults ?
probe with the positive lead and earth lead on battery
How do you diagnose resistive faults ?
probe with the positive lead and earth lead on battery
how do you diagnose short circuit faults ?
probe using negative lead and positive lead on battery
will the fuse blow in an open circuit ?
no unless its caused by other fault
will fuse blow in resistive circuit ?
no
will fuse blow in short circuit ?
yes
what are the symptoms of an open circuit ?
not working
what are the symptoms of a resistive circuit?
dim/slow
what are the symptoms of a short circuit ?
not working
What is the primary side of a relay ?
85 in 86 out
what current runs through the primary side of a relay ?
low current
what is the secondary side of a relay ?
30 in 87 out
what current runs through the secondary side of a relay ?
high current
how do you measure resistance of a consumer ?
disconnect consumer from circuit and measure in ohms
how do you measure amps ?
connect amp meter in series so all current passes through the amp meter
