GCOR PRACTICE EXAM (LATEST UPDATE
2026) QUESTIONS WITH 100% VERIFIED
CORRECT ANSWERS RATED A+
Dual Control Switch -CORRECTANSWER A power operated switch, movable point
frog, or derail that can also be operated by hand.
Electric Switch Lock -CORRECTANSWER An electrically controlled lock that restricts
the use of a hand operated switch or derail.
Absolute Signal -CORRECTANSWER A block or interlocking signal without a number
plate or designated by an A marker.
Automatic Block System (ABS) -CORRECTANSWER 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 -CORRECTANSWER A length of track between consecutive block signals or
between a block signal and the end of block system limits.
Centralized Traffic Control (CTC) -CORRECTANSWER A block system that uses block
signal indications to authorize train movements.
,Control Operator -CORRECTANSWER An employee assigned to operate a CTC or
interlocking control machine or authorized to grant track permits.
Control Point -CORRECTANSWER The location of absolute signals controlled by a
central operator or a railroad identifiable point as defined in the Timetable.
Controlled Siding -CORRECTANSWER A siding within CTC and Interlocking limits
where a signal indication authorizes the siding's use.
Controlled Signal -CORRECTANSWER An absolute signal controlled by a control
operator.
Controlled Track -CORRECTANSWER 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 -CORRECTANSWER A combination of two switches that connect two
adjacent tracks.
Interlocking Signals -CORRECTANSWER The fixed signals of an interlocking that
govern trains using interlocking limits.
, Loaded Bulk Commodity Train -CORRECTANSWER 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 -CORRECTANSWER A track extending through yards and between
stations that must be occupied without authority or protection.
Non-Controlled Track -CORRECTANSWER 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 -CORRECTANSWER Machines that may be operated on the right
of way foul of track.
Proceed Indication -CORRECTANSWER Any block signal indication that allows a train
to proceed without stopping.
Reverse Movement -CORRECTANSWER A movement opposite the authorized
direction.
Siding -CORRECTANSWER A track connected to the main track and used for meeting
or passing trains. Locations of sidings are shown int he Timetable.
2026) QUESTIONS WITH 100% VERIFIED
CORRECT ANSWERS RATED A+
Dual Control Switch -CORRECTANSWER A power operated switch, movable point
frog, or derail that can also be operated by hand.
Electric Switch Lock -CORRECTANSWER An electrically controlled lock that restricts
the use of a hand operated switch or derail.
Absolute Signal -CORRECTANSWER A block or interlocking signal without a number
plate or designated by an A marker.
Automatic Block System (ABS) -CORRECTANSWER 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 -CORRECTANSWER A length of track between consecutive block signals or
between a block signal and the end of block system limits.
Centralized Traffic Control (CTC) -CORRECTANSWER A block system that uses block
signal indications to authorize train movements.
,Control Operator -CORRECTANSWER An employee assigned to operate a CTC or
interlocking control machine or authorized to grant track permits.
Control Point -CORRECTANSWER The location of absolute signals controlled by a
central operator or a railroad identifiable point as defined in the Timetable.
Controlled Siding -CORRECTANSWER A siding within CTC and Interlocking limits
where a signal indication authorizes the siding's use.
Controlled Signal -CORRECTANSWER An absolute signal controlled by a control
operator.
Controlled Track -CORRECTANSWER 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 -CORRECTANSWER A combination of two switches that connect two
adjacent tracks.
Interlocking Signals -CORRECTANSWER The fixed signals of an interlocking that
govern trains using interlocking limits.
, Loaded Bulk Commodity Train -CORRECTANSWER 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 -CORRECTANSWER A track extending through yards and between
stations that must be occupied without authority or protection.
Non-Controlled Track -CORRECTANSWER 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 -CORRECTANSWER Machines that may be operated on the right
of way foul of track.
Proceed Indication -CORRECTANSWER Any block signal indication that allows a train
to proceed without stopping.
Reverse Movement -CORRECTANSWER A movement opposite the authorized
direction.
Siding -CORRECTANSWER A track connected to the main track and used for meeting
or passing trains. Locations of sidings are shown int he Timetable.
