GCOR EXAM STUDY GUIDE 2025 QUESTIONS WITH
SOLUTIONS GUARANTEE A+
✔✔When a train or engine is stopped in a tunnel and cannot move promptly, what must
crewmembers do?
1.43 - ✔✔1. Shut down diesel engine at once.
2. Make a full service break application.
3. Apply hand brakes to prevent movement in case the air brakes leak off.
✔✔Who is responsible for the safety and protection of their train and the observance of
the rules?
1.47 - ✔✔The conductor and the engineer.
✔✔What are the responsibilities of the conductor?
1.47 A - ✔✔1. To supervise the operation and administration of the train.
2. Advise the engineer and the dispatcher of any restrictions on equipment being
handled.
3. Remind the engineer that the train is approaching an area restricted by:
Limits of authority, track warrant, track bulletin, or radio speed restrictions. The
conductor must remind the engineer after the train passes the last station, but at least 2
miles from the restriction.
✔✔What are the responsibilities of the engineer?
1.47B - ✔✔1. To safely and efficiently operate the engine.
2. To check with the conductor if any cars or units in the train require special handling.
✔✔When there is more than one crewmember in the engine control compartment, what
must they communicate to each other?
1.47 C - ✔✔1. The names of signals affecting their train.
2. Any restrictions or other known conditions that affect the safe operation of their train.
✔✔What required information must be given when transmitting or acknowledging a
radio communication?
2.2 - ✔✔Required identification, including:
The name or initials of the railroad, train name or number, engine number, or words that
identify the precise mobile unit.
✔✔What must an employee state when radio communication has ended or is
completed?
2.4 - ✔✔out
✔✔Other than a radio on the lead locomotive, what other communication devices must
a train have?
2.5 - ✔✔A second means of communication, which may include:
,An operative radio on any unit in the consist, a portable radio, or another wireless
communication device.
✔✔If an employee receives a radio call must that call be acknowledged?
2.8 - ✔✔Yes, unless it is unsafe to do so.
✔✔What situation would require a radio transmission to begin with the words
"emergency, emergency, emergency"?
2.10 - ✔✔Derailments, collisions, storms, washouts, fires, track obstructions,
emergency brake applications, overrunning limits of authority, and overrunning stop
indications.
✔✔When would it be permissible for a train crew to tell another train crew the indication
of a fixed signal?
2.12 - ✔✔1. If the information is given between members of the same crew.
2. If the information is needed to warn of an emergency.
✔✔Who may copy a mandatory directive?
2.14 - ✔✔Any employee not operating the controls of moving engine.
✔✔Who has to have a copy of a mandatory directive?
2.14 - ✔✔The conductor and engineer.
✔✔Which crew members of a train must read and understand mandatory directives?
2.14 - ✔✔All crewmembers.
✔✔How would the following be stated and repeated during the transmission of a
mandatory directive?
"AMTK 123 west, do not exceed 10 mph between MP 8 and MP 9.5."
2.14 - ✔✔A - M - T - K west, do not exceed 10, one-zero, mph, between milepost nine,
N-I-N-E, and milepost 9.5, nine decimal five.
✔✔When is use of ANY electronic device prohibited?
2.21 - ✔✔When such use would risk distracting an employee from a safety related task.
✔✔Who must know which moves will be made by radio communication?
5.3.7 - ✔✔All crewmembers.
✔✔What must radio communications for pushing or shoving movements specify?
5.3.7 - ✔✔Direction and distance, must be acknowledged when more than four cars.
✔✔While making a shoving movement, when must the movement be stopped if
additional instructions are not received from the employee protecting the shove?
, 5.3.7 - ✔✔Half the distance specified.
✔✔What is required if a yellow flag is encountered where there is no restriction in
effect?
5.4.2B - ✔✔Once a train is 2 miles ahead of the yellow flag, proceed not exceeding 10
mph.
✔✔When may a train that encounters a yellow flag where there is no restriction in affect
increase speed?
5.4.2B - ✔✔Only after the rear of a train has either:
1. Passed a green flag.
2. Traveled 4 miles beyond the yellow flag AND dispatch verifies that there are no
speed restrictions in effect at that location.
✔✔You have encountered a yellow flag at mile post 202, but there are no restrictions in
effect at that location. At mile post 203 you find a green flag. May resume speed after
passing this green flag?
5.4.2B - ✔✔Yes.
✔✔What is required if a yellow-red flag is encountered where there is no restriction in
effect?
5.4.3B - ✔✔1. Attempt to contact the foreman in charge of the yellow-red flag.
2. Prepare to stop short of a red flag 2 miles ahead of the yellow-red flag.
3. If there is a red flag displayed: proceed per rule 5.4.7.
4. If there is no red flag displayed: proceed at restricted speed until either:
1. Instructions have been received from the employee in charge of the yellow-red flag.
2. The leading wheels have passed 4 miles beyond the yellow red flag, and dispatch
has verified that no form B is in effect at that location.
✔✔Can maintenance of way employees foul the main track within the limits of a Form B
in the hour before it goes into effect? - ✔✔No: the display of yellow red flags does not
extend the authorized working times listed on the track bulletin Form B .
✔✔You have encountered a yellow red flag at mile post 10 for a form B which is not in
effect yet. What must you do if there is no red flag displayed at mile post 12 and you are
not able to contact the employee in charge?
5.4.3B - ✔✔Proceed at restricted speed until The leading wheels have passed milepost
14, and dispatch has verified that no form B is in effect at that location.
✔✔Will a green flag be displayed at the end of every temporary speed restriction?
5.4.5 - ✔✔Yes, unless there is a series of locations which require reduced speeds,
which would cause green flags to overlap yellow flags. When this is the case, yellow
flags are placed before each speed restriction, and one green flag is placed at the end
of the last speed restriction.
SOLUTIONS GUARANTEE A+
✔✔When a train or engine is stopped in a tunnel and cannot move promptly, what must
crewmembers do?
1.43 - ✔✔1. Shut down diesel engine at once.
2. Make a full service break application.
3. Apply hand brakes to prevent movement in case the air brakes leak off.
✔✔Who is responsible for the safety and protection of their train and the observance of
the rules?
1.47 - ✔✔The conductor and the engineer.
✔✔What are the responsibilities of the conductor?
1.47 A - ✔✔1. To supervise the operation and administration of the train.
2. Advise the engineer and the dispatcher of any restrictions on equipment being
handled.
3. Remind the engineer that the train is approaching an area restricted by:
Limits of authority, track warrant, track bulletin, or radio speed restrictions. The
conductor must remind the engineer after the train passes the last station, but at least 2
miles from the restriction.
✔✔What are the responsibilities of the engineer?
1.47B - ✔✔1. To safely and efficiently operate the engine.
2. To check with the conductor if any cars or units in the train require special handling.
✔✔When there is more than one crewmember in the engine control compartment, what
must they communicate to each other?
1.47 C - ✔✔1. The names of signals affecting their train.
2. Any restrictions or other known conditions that affect the safe operation of their train.
✔✔What required information must be given when transmitting or acknowledging a
radio communication?
2.2 - ✔✔Required identification, including:
The name or initials of the railroad, train name or number, engine number, or words that
identify the precise mobile unit.
✔✔What must an employee state when radio communication has ended or is
completed?
2.4 - ✔✔out
✔✔Other than a radio on the lead locomotive, what other communication devices must
a train have?
2.5 - ✔✔A second means of communication, which may include:
,An operative radio on any unit in the consist, a portable radio, or another wireless
communication device.
✔✔If an employee receives a radio call must that call be acknowledged?
2.8 - ✔✔Yes, unless it is unsafe to do so.
✔✔What situation would require a radio transmission to begin with the words
"emergency, emergency, emergency"?
2.10 - ✔✔Derailments, collisions, storms, washouts, fires, track obstructions,
emergency brake applications, overrunning limits of authority, and overrunning stop
indications.
✔✔When would it be permissible for a train crew to tell another train crew the indication
of a fixed signal?
2.12 - ✔✔1. If the information is given between members of the same crew.
2. If the information is needed to warn of an emergency.
✔✔Who may copy a mandatory directive?
2.14 - ✔✔Any employee not operating the controls of moving engine.
✔✔Who has to have a copy of a mandatory directive?
2.14 - ✔✔The conductor and engineer.
✔✔Which crew members of a train must read and understand mandatory directives?
2.14 - ✔✔All crewmembers.
✔✔How would the following be stated and repeated during the transmission of a
mandatory directive?
"AMTK 123 west, do not exceed 10 mph between MP 8 and MP 9.5."
2.14 - ✔✔A - M - T - K west, do not exceed 10, one-zero, mph, between milepost nine,
N-I-N-E, and milepost 9.5, nine decimal five.
✔✔When is use of ANY electronic device prohibited?
2.21 - ✔✔When such use would risk distracting an employee from a safety related task.
✔✔Who must know which moves will be made by radio communication?
5.3.7 - ✔✔All crewmembers.
✔✔What must radio communications for pushing or shoving movements specify?
5.3.7 - ✔✔Direction and distance, must be acknowledged when more than four cars.
✔✔While making a shoving movement, when must the movement be stopped if
additional instructions are not received from the employee protecting the shove?
, 5.3.7 - ✔✔Half the distance specified.
✔✔What is required if a yellow flag is encountered where there is no restriction in
effect?
5.4.2B - ✔✔Once a train is 2 miles ahead of the yellow flag, proceed not exceeding 10
mph.
✔✔When may a train that encounters a yellow flag where there is no restriction in affect
increase speed?
5.4.2B - ✔✔Only after the rear of a train has either:
1. Passed a green flag.
2. Traveled 4 miles beyond the yellow flag AND dispatch verifies that there are no
speed restrictions in effect at that location.
✔✔You have encountered a yellow flag at mile post 202, but there are no restrictions in
effect at that location. At mile post 203 you find a green flag. May resume speed after
passing this green flag?
5.4.2B - ✔✔Yes.
✔✔What is required if a yellow-red flag is encountered where there is no restriction in
effect?
5.4.3B - ✔✔1. Attempt to contact the foreman in charge of the yellow-red flag.
2. Prepare to stop short of a red flag 2 miles ahead of the yellow-red flag.
3. If there is a red flag displayed: proceed per rule 5.4.7.
4. If there is no red flag displayed: proceed at restricted speed until either:
1. Instructions have been received from the employee in charge of the yellow-red flag.
2. The leading wheels have passed 4 miles beyond the yellow red flag, and dispatch
has verified that no form B is in effect at that location.
✔✔Can maintenance of way employees foul the main track within the limits of a Form B
in the hour before it goes into effect? - ✔✔No: the display of yellow red flags does not
extend the authorized working times listed on the track bulletin Form B .
✔✔You have encountered a yellow red flag at mile post 10 for a form B which is not in
effect yet. What must you do if there is no red flag displayed at mile post 12 and you are
not able to contact the employee in charge?
5.4.3B - ✔✔Proceed at restricted speed until The leading wheels have passed milepost
14, and dispatch has verified that no form B is in effect at that location.
✔✔Will a green flag be displayed at the end of every temporary speed restriction?
5.4.5 - ✔✔Yes, unless there is a series of locations which require reduced speeds,
which would cause green flags to overlap yellow flags. When this is the case, yellow
flags are placed before each speed restriction, and one green flag is placed at the end
of the last speed restriction.
