GCOR PRACTICE TEST QUESTIONS & ANSWERS
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 - Answer -An employee assigned to operate a CTC or interlocking
control machine or authorized to grant track permits.
Control Point - Answer -The location of absolute signals controlled by a central operator
or a railroad identifiable point as defined in the Timetable.
Controlled Siding - Answer -A siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal - Answer -An absolute signal controlled by a control operator.
Controlled Track - Answer -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 - Answer -A combination of two switches that connect two adjacent tracks.
Interlocking Signals - Answer -The fixed signals of an interlocking that govern trains
using interlocking limits.
Loaded Bulk Commodity Train - Answer -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 - Answer -A track extending through yards and between stations that must
be occupied without authority or protection.
Non-Controlled Track - Answer -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 - Answer -Machines that may be operated on the right of way foul
of track.
Proceed Indication - Answer -Any block signal indication that allows a train to proceed
without stopping.
Reverse Movement - Answer -A movement opposite the authorized direction.
Siding - Answer -A track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
Special Instructions - Answer -Instructions contained in the Timetable or other
publications.
Station - Answer -A place designated by name in the Timetable station column.
Track Bulletin - Answer -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 - Answer -Any equipment which is designed to operate on the rail, other than
a Locomotive or railroad car.
Track Warrant Control (TWC) - Answer -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 - Answer -One or more engines coupled, with or without cars, displaying a
marker, and authorized to operate ont he main track.
Yard Limit - Answer -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 - Answer -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 - Answer -Name or initials of the railroad
Train name(number), enginenumber, or words that identify the precise mobile unit.
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 - Answer -An employee assigned to operate a CTC or interlocking
control machine or authorized to grant track permits.
Control Point - Answer -The location of absolute signals controlled by a central operator
or a railroad identifiable point as defined in the Timetable.
Controlled Siding - Answer -A siding within CTC and Interlocking limits where a signal
indication authorizes the siding's use.
Controlled Signal - Answer -An absolute signal controlled by a control operator.
Controlled Track - Answer -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 - Answer -A combination of two switches that connect two adjacent tracks.
Interlocking Signals - Answer -The fixed signals of an interlocking that govern trains
using interlocking limits.
Loaded Bulk Commodity Train - Answer -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 - Answer -A track extending through yards and between stations that must
be occupied without authority or protection.
Non-Controlled Track - Answer -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 - Answer -Machines that may be operated on the right of way foul
of track.
Proceed Indication - Answer -Any block signal indication that allows a train to proceed
without stopping.
Reverse Movement - Answer -A movement opposite the authorized direction.
Siding - Answer -A track connected to the main track and used for meeting or passing
trains. Locations of sidings are shown int he Timetable.
Special Instructions - Answer -Instructions contained in the Timetable or other
publications.
Station - Answer -A place designated by name in the Timetable station column.
Track Bulletin - Answer -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 - Answer -Any equipment which is designed to operate on the rail, other than
a Locomotive or railroad car.
Track Warrant Control (TWC) - Answer -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 - Answer -One or more engines coupled, with or without cars, displaying a
marker, and authorized to operate ont he main track.
Yard Limit - Answer -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 - Answer -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 - Answer -Name or initials of the railroad
Train name(number), enginenumber, or words that identify the precise mobile unit.
