GCOR EXAMINATION TEST SCRIPT 2026 FULL
QUESTIONS AND ANSWERS GRADED A+
◉ What main track authorities apply to manual interlockings?
Answer: Verbal authority from the control operator or a controlled
signal indicates proceed.
◉ Define absolute signal. Answer: A block or interlocking signal
without a number plate, or designated by an "A" marker.
◉ Define automatic block system (ABS). Answer: A series of
consecutive blocks governed by block signals, cab signals, or both.
The signals are activated by a train or by certain conditions that
affect the block use.
◉ Define block. Answer: A length of track:
-between consecutive block signals
-between a block signal and the end of the block system limits, or
-in ATC limits the use of which is governed by cab signals and/or
block signals
◉ Define block signal. Answer: A fixed signal at the entrance of a
block that governs trains entering and using that block.
,◉ Define block system. Answer: A block or series of consecutive
blocks within ABS, ACS, CTC, or interlocking limits.
◉ Define centralized traffic control (CTC). Answer: A block system
that uses block signal indications to authorize train movements.
◉ Define control point. Answer: The location of absolute signals
controlled by a control operator.
◉ Define current of traffic. Answer: The movement of trains in one
direction on a main track, as specified by the rules.
◉ Define double track. Answer: Two main tracks where the current
of traffic on one track is in a specified direction and in the opposite
direction on the other.
◉ Define general track bulletin. Answer: A notice containing track
bulletin restrictions and other conditions affecting train movement.
◉ Define interlocking. Answer: Signal appliances that are
interconnected so that each of their movements follows the other in
proper sequence. May be operated manually or automatically.
,◉ Define main track. Answer: A track extending through yards and
between stations that must not be occupied without authority or
protection.
◉ Define multiple main tracks. Answer: Two or more main tracks
that are used according to the timetable.
◉ Define proceed indication. Answer: Any block signal that allows a
train to proceed without stopping.
◉ Define track warrant control (TWC). Answer: A method to
authorize train movements or protect men or machines on a main
track within specified limits in a territory designated by the
timetable.
◉ Define trackside warning detector. Answer: A device that indicates
conditions such as overheated journals, dragging equipment, excess
dimensions, shifted loads, high water, or slides.
◉ Define yard. Answer: A system of tracks, other than main tracks
and sidings, used for making up trains, storing cars, and other
purposes.
◉ Define yard limits Answer: A portion of main track designated by
yard limit signs and timetable special instructions or a track bulletin.
, ◉ What is the most important element in performing job duties?
Answer: Safety.
◉ Who can issue or cancel a general order? Answer: The designated
manager.
◉ What information is contained in general orders? Answer: The
information and instructions related to rules or operating practices.
◉ How are general orders used? Answer: They replace any rule,
special instruction, or regulation that conflicts with them.
◉ What is rule 1.3.3? Answer: Inspection of freight cars.
◉ What must cars be checked for during a safety inspection?
Answer: Leaning, sagging, improper truck position, object hanging
or dragging, objects extending from the side, insecurely attached
doors, broken or missing safety appliances, contents leaking,
insecure coupling devices, overheard journals or wheels, broken or
cracked wheels, brakes that fail to release, or any other apparent
hazard that could cause an accident.
◉ Who is responsible for the safety and protection of the train?
Answer: The conductor and engineer.
QUESTIONS AND ANSWERS GRADED A+
◉ What main track authorities apply to manual interlockings?
Answer: Verbal authority from the control operator or a controlled
signal indicates proceed.
◉ Define absolute signal. Answer: A block or interlocking signal
without a number plate, or designated by an "A" marker.
◉ Define automatic block system (ABS). Answer: A series of
consecutive blocks governed by block signals, cab signals, or both.
The signals are activated by a train or by certain conditions that
affect the block use.
◉ Define block. Answer: A length of track:
-between consecutive block signals
-between a block signal and the end of the block system limits, or
-in ATC limits the use of which is governed by cab signals and/or
block signals
◉ Define block signal. Answer: A fixed signal at the entrance of a
block that governs trains entering and using that block.
,◉ Define block system. Answer: A block or series of consecutive
blocks within ABS, ACS, CTC, or interlocking limits.
◉ Define centralized traffic control (CTC). Answer: A block system
that uses block signal indications to authorize train movements.
◉ Define control point. Answer: The location of absolute signals
controlled by a control operator.
◉ Define current of traffic. Answer: The movement of trains in one
direction on a main track, as specified by the rules.
◉ Define double track. Answer: Two main tracks where the current
of traffic on one track is in a specified direction and in the opposite
direction on the other.
◉ Define general track bulletin. Answer: A notice containing track
bulletin restrictions and other conditions affecting train movement.
◉ Define interlocking. Answer: Signal appliances that are
interconnected so that each of their movements follows the other in
proper sequence. May be operated manually or automatically.
,◉ Define main track. Answer: A track extending through yards and
between stations that must not be occupied without authority or
protection.
◉ Define multiple main tracks. Answer: Two or more main tracks
that are used according to the timetable.
◉ Define proceed indication. Answer: Any block signal that allows a
train to proceed without stopping.
◉ Define track warrant control (TWC). Answer: A method to
authorize train movements or protect men or machines on a main
track within specified limits in a territory designated by the
timetable.
◉ Define trackside warning detector. Answer: A device that indicates
conditions such as overheated journals, dragging equipment, excess
dimensions, shifted loads, high water, or slides.
◉ Define yard. Answer: A system of tracks, other than main tracks
and sidings, used for making up trains, storing cars, and other
purposes.
◉ Define yard limits Answer: A portion of main track designated by
yard limit signs and timetable special instructions or a track bulletin.
, ◉ What is the most important element in performing job duties?
Answer: Safety.
◉ Who can issue or cancel a general order? Answer: The designated
manager.
◉ What information is contained in general orders? Answer: The
information and instructions related to rules or operating practices.
◉ How are general orders used? Answer: They replace any rule,
special instruction, or regulation that conflicts with them.
◉ What is rule 1.3.3? Answer: Inspection of freight cars.
◉ What must cars be checked for during a safety inspection?
Answer: Leaning, sagging, improper truck position, object hanging
or dragging, objects extending from the side, insecurely attached
doors, broken or missing safety appliances, contents leaking,
insecure coupling devices, overheard journals or wheels, broken or
cracked wheels, brakes that fail to release, or any other apparent
hazard that could cause an accident.
◉ Who is responsible for the safety and protection of the train?
Answer: The conductor and engineer.
