Electrical
Inside the nucleus are two atomic particles, protons and ...
neutrons
The information conveyed by a fixed signal.
Indication
If you lift your track shunt will the crossing stop operating immediately?
No. After 20 sec
What relay cuts out the power to the DC motor?
WPR
This type of locking prevents the clearing of a signal into an occupied block.
Traffic.
.25 A equals how many milliamps?
250
To check the current, open the test link and place the ammeter in ...
Series
When a train moves onto the XT what happens the the SR?
Picks
What reverses the direction of motor rotation?
WR
This type of locking prevents the movement of any switch.
Route
In a series circuit this is constant.
Current
This carries the normal load in a DC track circuit.
Charger
This relay delays the gate descent.
GPPR
With the switch reverse what is the status of the Traffic relay?
Energized
What prevents the RTC from changing the route?
Timer.
This is constant in a parallel branch.
Voltage
This device changes DC to AC.
Inverter
Inductance in the rail will increase with track length or ...
Frequency
In the ASR circuit, when does the timer start?
When the signal is cancelled.
What track code will tumble down opposing signal.
Code 6.
The lowest voltage drop occurs across this resistor.
smallest
A component that passes DC and blocks AC.
Inductor
What configuration can look into both approaches?
Bidirectional
What direction is the line feed for a westbound train?
East
What type of locking doesn't use the ASR circuit?
Detector and Indication.