GCOR UPDATED EXAM MOCK EXAM WITH
ANSWER RATIONALES 2026
◉ Absolute Signal.
Answer: A block or interlocking signal without a number plate, or
designated by an "A" marker.
◉ 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.
◉ 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
◉ block signal.
Answer: A fixed signal at the entrance of a block that governs trains
entering and using that block.
,◉ block system.
Answer: A block or series of consecutive blocks within ABS, ACS,
CTC, or interlocking limits.
◉ centralized traffic control (CTC).
Answer: A block system that uses block signal indications to
authorize train movements.
◉ control point.
Answer: The location of absolute signals controlled by a control
operator.
◉ 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.
◉ 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 RATIONALES 2026
◉ Absolute Signal.
Answer: A block or interlocking signal without a number plate, or
designated by an "A" marker.
◉ 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.
◉ 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
◉ block signal.
Answer: A fixed signal at the entrance of a block that governs trains
entering and using that block.
,◉ block system.
Answer: A block or series of consecutive blocks within ABS, ACS,
CTC, or interlocking limits.
◉ centralized traffic control (CTC).
Answer: A block system that uses block signal indications to
authorize train movements.
◉ control point.
Answer: The location of absolute signals controlled by a control
operator.
◉ 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.
◉ 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?
