GCOR Practice Test
Dual Control Switch - answer A power operated switch, movable point frog, or derail
that can also be operated by hand.
Electric Switch Lock - answer An electrically controlled lock that restricts the use of a
hand operated switch or derail.
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 or between a block
signal and the end of block system limits.
Centralized Traffic Control (CTC) - answer A block system that uses block signal
indications to authorize train movements.
Control Operator - answerAn employee assigned to operate a CTC or interlocking
control machine or authorized to grant track permits.
Control Point - answerThe location of absolute signals controlled by a central operator
or a railroad identifiable point as defined in the Timetable.
Controlled Siding - answerA siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal - answerAn absolute signal controlled by a control operator.
Controlled Track - answerTrack 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 - answerA combination of two switches that connect two adjacent tracks.
Interlocking Signals - answerThe fixed signals of an interlocking that govern trains using
interlocking limits.
Loaded Bulk Commodity Train - answerLoaded 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 - answerA track extending through yards and between stations that must be
occupied without authority or protection.
Non-Controlled Track - answerTrack 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 - answerMachines that may be operated on the right of way foul of
track.
Proceed Indication - answerAny block signal indication that allows a train to proceed
without stopping.
Reverse Movement - answerA movement opposite the authorized direction.
Siding - answerA track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
Special Instructions - answerInstructions contained in the Timetable or other
publications.
Station - answerA place designated by name in the Timetable station column.
Track Bulletin - answerA 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 - answerAny equipment which is designed to operate on the rail, other than a
Locomotive or railroad car.
Track Warrant Control (TWC) - answerA 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 - answerOne or more engines coupled, with or without cars, displaying a marker,
and authorized to operate ont he main track.
Yard Limit - answerA 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 - answerBefore 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 - answerName or initials of the railroad
Dual Control Switch - answer A power operated switch, movable point frog, or derail
that can also be operated by hand.
Electric Switch Lock - answer An electrically controlled lock that restricts the use of a
hand operated switch or derail.
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 or between a block
signal and the end of block system limits.
Centralized Traffic Control (CTC) - answer A block system that uses block signal
indications to authorize train movements.
Control Operator - answerAn employee assigned to operate a CTC or interlocking
control machine or authorized to grant track permits.
Control Point - answerThe location of absolute signals controlled by a central operator
or a railroad identifiable point as defined in the Timetable.
Controlled Siding - answerA siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal - answerAn absolute signal controlled by a control operator.
Controlled Track - answerTrack 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 - answerA combination of two switches that connect two adjacent tracks.
Interlocking Signals - answerThe fixed signals of an interlocking that govern trains using
interlocking limits.
Loaded Bulk Commodity Train - answerLoaded 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 - answerA track extending through yards and between stations that must be
occupied without authority or protection.
Non-Controlled Track - answerTrack 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 - answerMachines that may be operated on the right of way foul of
track.
Proceed Indication - answerAny block signal indication that allows a train to proceed
without stopping.
Reverse Movement - answerA movement opposite the authorized direction.
Siding - answerA track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
Special Instructions - answerInstructions contained in the Timetable or other
publications.
Station - answerA place designated by name in the Timetable station column.
Track Bulletin - answerA 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 - answerAny equipment which is designed to operate on the rail, other than a
Locomotive or railroad car.
Track Warrant Control (TWC) - answerA 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 - answerOne or more engines coupled, with or without cars, displaying a marker,
and authorized to operate ont he main track.
Yard Limit - answerA 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 - answerBefore 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 - answerName or initials of the railroad
