BNSF Session 4 Exam Questions With
100% Correct Answers
If you have a track relay the two common resistance of the coil are ________ Ohms and
_________ and are usually supplied with ________ volts? - Answer2 Ohms, 4 Ohms,
and 1-2Volts
/.If you have a line relay the two common resistances of the coil are ________ Ohms
and ________ Ohms and are usually supplied with _________ volts? - Answer500
Ohms, 1000 Ohms, and 10-14 Volts
/.In CTC territory, a hand throw switch is not sufficient protection, what else do we need
to install to prevent the hand throw switch from being operated until safe to do so. -
AnswerElectric Switch Lock
/.What does the letter "N" designate, regarding contact adjustment, on a circuit print of a
switch circuit controller? - AnswerFront & Heal contacts made from full normal up to but
not including 1/4 inch from full normal
/.What portion of a GRS 9B electric switch lock must be extracted from the lock rod
before the switch points can move? - AnswerPlunger
/.To expedite train departure from the mainline BNSF installs a mainline
_____________ circuit ahead of the switch point for an EWL. - AnswerRelease
/.Before adjusting any power operated switch machine the points should be closed with
moderate pressure to the stock rail, if the point is gapped where would this adjustment
be made to correct this? - AnswerBasket
/.On a POSM, nomenclature can vary but if there is a NWCR and RWCR what are
these relays used to repeat? - AnswerThe switch position corresponds with the
dispatcher's request
/.On a POSM, nomenclature can vary but if the is a NWPR and RWPR what does the
RWPR indicate. - AnswerThe switch is lined reverse
/.When adjusting a power operated switch machine, always adjust the rods in the
following order? - AnswerFar PD, Far Lock, Near PD, Near Lock
/.The relay which requests the route for any train based on "first come first serve" is
the? - AnswerApproach Track Relay
/.The relay which requests and establishes the route? - AnswerRoute Relay and the
Route Repeater Relay
, /.The relay which changes the signal aspect is the? - AnswerHome Relay
/.The relay which prevents a signal clearing behind a train as it leaves the interlocker is
the? - AnswerStick Relay
/.A _____________ _____ _________ of 5 seconds or less shall not permit an
established rout to be changed at an automatic interlocking - Answerloss of shunt (FRA
236.309)
/.___________ locking prevents opposing signals from clearing once a train has a
proceed signal in the route. - AnswerTraffic Locking (FRA 236.769)
/.Approach or time locking shall be provided for all interlocker signals capable of
displaying aspects more favorable than? - AnswerProceed at restricted speed (FRA
236.305)
/.Nemonic for Interlocking:
Owning
Real
Expensive
Luxury
Cars
Lets
People
Realize
UR
Rich - AnswerOccupy the Track
Request the Track
Establish the Route
Lock the Route
Clear the Signal
Light the Signal
Pick the Stick
Release the Route
Unlock the Route
Release the Stick
/.With regards to interlocking "Occupancy" involves what relay(s): - AnswerRelays
down: ATR, TR, AR, APR
/.With regards to interlocking "Request the Route" involves what relay(s): - AnswerRelay
up: RR
/.With regards to interlocking "Establish the Route" involves what relay(s): -
AnswerRelay up: RPR
100% Correct Answers
If you have a track relay the two common resistance of the coil are ________ Ohms and
_________ and are usually supplied with ________ volts? - Answer2 Ohms, 4 Ohms,
and 1-2Volts
/.If you have a line relay the two common resistances of the coil are ________ Ohms
and ________ Ohms and are usually supplied with _________ volts? - Answer500
Ohms, 1000 Ohms, and 10-14 Volts
/.In CTC territory, a hand throw switch is not sufficient protection, what else do we need
to install to prevent the hand throw switch from being operated until safe to do so. -
AnswerElectric Switch Lock
/.What does the letter "N" designate, regarding contact adjustment, on a circuit print of a
switch circuit controller? - AnswerFront & Heal contacts made from full normal up to but
not including 1/4 inch from full normal
/.What portion of a GRS 9B electric switch lock must be extracted from the lock rod
before the switch points can move? - AnswerPlunger
/.To expedite train departure from the mainline BNSF installs a mainline
_____________ circuit ahead of the switch point for an EWL. - AnswerRelease
/.Before adjusting any power operated switch machine the points should be closed with
moderate pressure to the stock rail, if the point is gapped where would this adjustment
be made to correct this? - AnswerBasket
/.On a POSM, nomenclature can vary but if there is a NWCR and RWCR what are
these relays used to repeat? - AnswerThe switch position corresponds with the
dispatcher's request
/.On a POSM, nomenclature can vary but if the is a NWPR and RWPR what does the
RWPR indicate. - AnswerThe switch is lined reverse
/.When adjusting a power operated switch machine, always adjust the rods in the
following order? - AnswerFar PD, Far Lock, Near PD, Near Lock
/.The relay which requests the route for any train based on "first come first serve" is
the? - AnswerApproach Track Relay
/.The relay which requests and establishes the route? - AnswerRoute Relay and the
Route Repeater Relay
, /.The relay which changes the signal aspect is the? - AnswerHome Relay
/.The relay which prevents a signal clearing behind a train as it leaves the interlocker is
the? - AnswerStick Relay
/.A _____________ _____ _________ of 5 seconds or less shall not permit an
established rout to be changed at an automatic interlocking - Answerloss of shunt (FRA
236.309)
/.___________ locking prevents opposing signals from clearing once a train has a
proceed signal in the route. - AnswerTraffic Locking (FRA 236.769)
/.Approach or time locking shall be provided for all interlocker signals capable of
displaying aspects more favorable than? - AnswerProceed at restricted speed (FRA
236.305)
/.Nemonic for Interlocking:
Owning
Real
Expensive
Luxury
Cars
Lets
People
Realize
UR
Rich - AnswerOccupy the Track
Request the Track
Establish the Route
Lock the Route
Clear the Signal
Light the Signal
Pick the Stick
Release the Route
Unlock the Route
Release the Stick
/.With regards to interlocking "Occupancy" involves what relay(s): - AnswerRelays
down: ATR, TR, AR, APR
/.With regards to interlocking "Request the Route" involves what relay(s): - AnswerRelay
up: RR
/.With regards to interlocking "Establish the Route" involves what relay(s): -
AnswerRelay up: RPR
