Electrical Flashcards
On IP there will be a question that asks about a door switch in its normal resting/de-energized state. technically it is normally open but you must pick
normally closed, because the doors would be shut and system needs to be drawn in the de-energized state
discrete solenoids use big or small wires?
Big wires
proportional solenoids use big or small wires?
Many turns of fine diameter copper
what type of solenoid is a door latch?
discrete
Latching soenoid is in what resting position?
Which ever was its last position energized
what limits the top speed of a DC motor
CEMF (counter electromotive force) and will come colse to battery voltage but never the same
difference between a blocking diode and a clamping diode
blocking prevents induced voltage for a motor
clamping diode prevents arcing in a solenoid
shunt motor is a
parallel wound DC motor
On IP, blower resistor pack only loses 1st resistor, what is the outcome?
Medium and High are ok but no low speed
shunt motors parallel field coil reduced CEMF produced
T or F
true
TQ or IP, Cruise control on a Manual and Automatic will have how many shut offs?
manual 3 (clutch,brake,switch)
Auto 2 (brake,switch)
Can hi/lo voltage reading more than 4v?
check for excessive system voltage
circuit breakers are rated for a system how
1-1.5x circuit load
2-2.5x for motors
TQ/IP what is spec gravity of a fully charged battery
between 1.265-1.285
1.175 is a discharged battery
TQ/IP how many spec gravity point variation will batteries need to replaced
more than 50 points 0.050
TQ/IP advantages and disadvantages to LED
advantage is lights up quicker, brighter
disadvantage is it doesn’t produce heat to melt off snow on tail lights
TQ/IP is it permitted to modify or repair SRS wiring?
NO, must consult manufacturer
What does SRS connectors use to prevent arcing hen disconnecting
shorting bar
