Union Pacific -- Railroading Basics
(GCOR) Exam Questions and Answers
100% Solved
Main Track - ✔✔A track extending through yards and between stations that
must not be occupied without authority or protection.
Station - ✔✔A place designated by name in the timetable station column.
Single Track - ✔✔A main track where trains are operated in both directions.
Train - ✔✔One or more engines coupled, with or without cars, displaying a
marker, and authorized to operate on a main track. A term that when used
in connection with speed restrictions, flag protection, and the observance of
all signals and signal rules also applies to engines.
Yard Limits - ✔✔A portion of *main track* designated by yard limit signs
and timetable special instructions or a track bulletin. Within Yard Limits,
trains or engines are authorized to use the main track not protecting
against other trains or engines. *You can have Yard Limits without a yard.*
(Rule 6.13)
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, Yard - ✔✔A system of tracks, other than main tracks and sidings, used for
making up trains, storing cars, and other purposes.
Siding - ✔✔A track connected to the main track and used for meeting or
passing trains. Location of sidings are shown in the timetable.
Spur Track - ✔✔A track connected to another track at only one end, also
referred to as a stub track.
Track Bulletin - ✔✔A notice of conditions affecting train movement. It may
also authorize movement against the current of traffic where Rule 9.14
(Movement with the Current of Traffic) is in effect.
Track Warrant Control (TWC) - ✔✔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.
Block - ✔✔A length of track:
-- Between consecutive block signals
-- Between a block signal and the end of block system limits
or
In ATC limits, the use of which is governed by cab signals and/or block
signals.
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
(GCOR) Exam Questions and Answers
100% Solved
Main Track - ✔✔A track extending through yards and between stations that
must not be occupied without authority or protection.
Station - ✔✔A place designated by name in the timetable station column.
Single Track - ✔✔A main track where trains are operated in both directions.
Train - ✔✔One or more engines coupled, with or without cars, displaying a
marker, and authorized to operate on a main track. A term that when used
in connection with speed restrictions, flag protection, and the observance of
all signals and signal rules also applies to engines.
Yard Limits - ✔✔A portion of *main track* designated by yard limit signs
and timetable special instructions or a track bulletin. Within Yard Limits,
trains or engines are authorized to use the main track not protecting
against other trains or engines. *You can have Yard Limits without a yard.*
(Rule 6.13)
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, Yard - ✔✔A system of tracks, other than main tracks and sidings, used for
making up trains, storing cars, and other purposes.
Siding - ✔✔A track connected to the main track and used for meeting or
passing trains. Location of sidings are shown in the timetable.
Spur Track - ✔✔A track connected to another track at only one end, also
referred to as a stub track.
Track Bulletin - ✔✔A notice of conditions affecting train movement. It may
also authorize movement against the current of traffic where Rule 9.14
(Movement with the Current of Traffic) is in effect.
Track Warrant Control (TWC) - ✔✔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.
Block - ✔✔A length of track:
-- Between consecutive block signals
-- Between a block signal and the end of block system limits
or
In ATC limits, the use of which is governed by cab signals and/or block
signals.
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
