GCOR Practice Test || Questions and Correct Detailed Answers
Dual Control Switch correct answers A power operated switch, movable point frog, or derail that
can also be operated by hand.
Electric Switch Lock correct answers An electrically controlled lock that restricts the use of a
hand operated switch or derail.
Absolute Signal correct answers A block or interlocking signal without a number plate or
designated by an A marker.
Automatic Block System (ABS) correct answers 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 correct answers A length of track between consecutive block signals or between a block
signal and the end of block system limits.
Centralized Traffic Control (CTC) correct answers A block system that uses block signal
indications to authorize train movements.
Control Operator correct answers An employee assigned to operate a CTC or interlocking control
machine or authorized to grant track permits.
Control Point correct answers The location of absolute signals controlled by a central operator or
a railroad identifiable point as defined in the Timetable.
Controlled Siding correct answers A siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal correct answers An absolute signal controlled by a control operator.
,Controlled Track correct answers Track upon which the railroad's operating rules require that all
movements of trains must be authorized by a train dispatcher or a control operator.
Crossover correct answers A combination of two switches that connect two adjacent tracks.
Interlocking Signals correct answers The fixed signals of an interlocking that govern trains using
interlocking limits.
Loaded Bulk Commodity Train correct answers Loaded Unit Trains are defined as a train of 50
or more loaded cars in a block, each weighing 125 tons gross weight or more (bulk
commodities), such as coal, grain, soda ash, etc.
Main Track correct answers A track extending through yards and between stations that must be
occupied without authority or protection.
Non-Controlled Track correct answers Track upon which trains are permitted by railroad rule or
special instruction to move without recieving authorization from train dispatcher or control
operator.
Off-Track Equipment correct answers Machines that may be operated on the right of way foul of
track.
Proceed Indication correct answers Any block signal indication that allows a train to proceed
without stopping.
Reverse Movement correct answers A movement opposite the authorized direction.
Siding correct answers A track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
, Special Instructions correct answers Instructions contained in the Timetable or other
publications.
Station correct answers A place designated by name in the Timetable station column.
Track Bulletin correct answers A notice of coinditions affecting train movement. It may also
authorize movement against the current of traffic where rule 9.14 (movement witht he Current of
Traffic) is in effect.
Track Car correct answers Any equipment which is designed to operate on the rail, other than a
Locomotive or railroad car.
Track Warrant Control (TWC) correct answers A method to authorize train movements or protect
man or machines on a main track within specified limits in a territory designated by the timeline.
Train correct answers One or more engines coupled, with or without cars, displaying a marker,
and authorized to operate ont he main track.
Yard Limit correct answers A portion of main track designated by yard limit signs and time table
special instructions or a track bulletin.
Any employee operating a radio must do the following correct answers Before transmitting,
listen long enough to make sure the channel is not being used. Give the required identification.
Not proceed with further transmission until acknowledgement is received.
For Mobile Units correct answers Name or initials of the railroad
Train name(number), enginenumber, or words that identify the precise mobile unit.
Ending Radio Transmissions - "Over" correct answers When a response is expected
Dual Control Switch correct answers A power operated switch, movable point frog, or derail that
can also be operated by hand.
Electric Switch Lock correct answers An electrically controlled lock that restricts the use of a
hand operated switch or derail.
Absolute Signal correct answers A block or interlocking signal without a number plate or
designated by an A marker.
Automatic Block System (ABS) correct answers 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 correct answers A length of track between consecutive block signals or between a block
signal and the end of block system limits.
Centralized Traffic Control (CTC) correct answers A block system that uses block signal
indications to authorize train movements.
Control Operator correct answers An employee assigned to operate a CTC or interlocking control
machine or authorized to grant track permits.
Control Point correct answers The location of absolute signals controlled by a central operator or
a railroad identifiable point as defined in the Timetable.
Controlled Siding correct answers A siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal correct answers An absolute signal controlled by a control operator.
,Controlled Track correct answers Track upon which the railroad's operating rules require that all
movements of trains must be authorized by a train dispatcher or a control operator.
Crossover correct answers A combination of two switches that connect two adjacent tracks.
Interlocking Signals correct answers The fixed signals of an interlocking that govern trains using
interlocking limits.
Loaded Bulk Commodity Train correct answers Loaded Unit Trains are defined as a train of 50
or more loaded cars in a block, each weighing 125 tons gross weight or more (bulk
commodities), such as coal, grain, soda ash, etc.
Main Track correct answers A track extending through yards and between stations that must be
occupied without authority or protection.
Non-Controlled Track correct answers Track upon which trains are permitted by railroad rule or
special instruction to move without recieving authorization from train dispatcher or control
operator.
Off-Track Equipment correct answers Machines that may be operated on the right of way foul of
track.
Proceed Indication correct answers Any block signal indication that allows a train to proceed
without stopping.
Reverse Movement correct answers A movement opposite the authorized direction.
Siding correct answers A track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
, Special Instructions correct answers Instructions contained in the Timetable or other
publications.
Station correct answers A place designated by name in the Timetable station column.
Track Bulletin correct answers A notice of coinditions affecting train movement. It may also
authorize movement against the current of traffic where rule 9.14 (movement witht he Current of
Traffic) is in effect.
Track Car correct answers Any equipment which is designed to operate on the rail, other than a
Locomotive or railroad car.
Track Warrant Control (TWC) correct answers A method to authorize train movements or protect
man or machines on a main track within specified limits in a territory designated by the timeline.
Train correct answers One or more engines coupled, with or without cars, displaying a marker,
and authorized to operate ont he main track.
Yard Limit correct answers A portion of main track designated by yard limit signs and time table
special instructions or a track bulletin.
Any employee operating a radio must do the following correct answers Before transmitting,
listen long enough to make sure the channel is not being used. Give the required identification.
Not proceed with further transmission until acknowledgement is received.
For Mobile Units correct answers Name or initials of the railroad
Train name(number), enginenumber, or words that identify the precise mobile unit.
Ending Radio Transmissions - "Over" correct answers When a response is expected
