LIRR Assistant Conductor Definitions Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
Block - CORRECT ANSWER Block-
A length of track of defined limits, the use of which is governed by block signals, block-limit signals,
automatic speed control or any combination thereof.
Absolute Block - CORRECT ANSWER Absolute Block-
A block established between block stations, block-limit stations, interlockings or any combination
thereof which must not be occupied by more than one train except as provided by the rules.
Automatic Block Signal System - CORRECT ANSWER Automatic Block Signal System-
A block signal system wherein the use of each block is governed by an automatic block signal, the cab
signal indicator or both.
Block Signal System - CORRECT ANSWER Block Signal System-
A series of consecutive blocks.
Manual Block Signal System - CORRECT ANSWER Manual Block Signal System-
A block signal system wherein the use of each block is governed by block signals controlled
manually, by block-limit signals or both, upon information received by telephone, radio or other
means of communication.
Automatic Speed Control System (ASC) - CORRECT ANSWER Automatic Speed Control
System (ASC)-
, A system so arranged that its operation will automatically result in the following: A full service
application of the train brakes if, while operating under a speed restriction, the speed of the train
exceeds the predetermined rate. The application will continue until the train is either brought to a stop
or, under the control of the engineer, its speed is reduced to the predetermined rate.
Speed Controlled Train - CORRECT ANSWER Speed Controlled Train-
A train equipped with the following speed control apparatus, a cab signal indicator, sealed application
valve or switch, audible warning device and acknowledging switch, in operative condition for the
direction in which it is to move.
Engine - CORRECT ANSWER A unit propelled by any form of energy or a combination of
units operated from a single control, used in road or yard service.
Multiple Unit Equipment - CORRECT ANSWER Equipment capable of being propelled by
electrical energy through the use of third rail contact shoes.
Track Car - CORRECT ANSWER A roadway maintenance machine, not classified as an
engine, which is operated on track for inspection or maintenance. It may not shunt track circuits or
operate signals and will be governed by rules and special instructions for trains other than passenger
trains.
Interlocking (INT) - CORRECT ANSWER An arrangement of signals and signal appliances so
interconnected that their movements must succeed each other in proper sequence and for which
interlocking rules are in effect.
Interlocking Limits - CORRECT ANSWER The tracks between the extreme opposing home
signals of an interlocking.
Pilot - CORRECT ANSWER An employee assigned to a train or track car when the engineer,
conductor or track car driver is not qualified on the physical characteristics or rules of the railroad or
portion of the railroad over which the movement is to be made.
Aspect - CORRECT ANSWER The appearance of a fixed signal WHICH CONVEYS AN
INDICATION as viewed from the direction of an approaching train; the appearance of a cab signal
indicator as viewed in the engine control compartment.
UPDATED QUESTIONS AND CORRECT
ANSWERS
Block - CORRECT ANSWER Block-
A length of track of defined limits, the use of which is governed by block signals, block-limit signals,
automatic speed control or any combination thereof.
Absolute Block - CORRECT ANSWER Absolute Block-
A block established between block stations, block-limit stations, interlockings or any combination
thereof which must not be occupied by more than one train except as provided by the rules.
Automatic Block Signal System - CORRECT ANSWER Automatic Block Signal System-
A block signal system wherein the use of each block is governed by an automatic block signal, the cab
signal indicator or both.
Block Signal System - CORRECT ANSWER Block Signal System-
A series of consecutive blocks.
Manual Block Signal System - CORRECT ANSWER Manual Block Signal System-
A block signal system wherein the use of each block is governed by block signals controlled
manually, by block-limit signals or both, upon information received by telephone, radio or other
means of communication.
Automatic Speed Control System (ASC) - CORRECT ANSWER Automatic Speed Control
System (ASC)-
, A system so arranged that its operation will automatically result in the following: A full service
application of the train brakes if, while operating under a speed restriction, the speed of the train
exceeds the predetermined rate. The application will continue until the train is either brought to a stop
or, under the control of the engineer, its speed is reduced to the predetermined rate.
Speed Controlled Train - CORRECT ANSWER Speed Controlled Train-
A train equipped with the following speed control apparatus, a cab signal indicator, sealed application
valve or switch, audible warning device and acknowledging switch, in operative condition for the
direction in which it is to move.
Engine - CORRECT ANSWER A unit propelled by any form of energy or a combination of
units operated from a single control, used in road or yard service.
Multiple Unit Equipment - CORRECT ANSWER Equipment capable of being propelled by
electrical energy through the use of third rail contact shoes.
Track Car - CORRECT ANSWER A roadway maintenance machine, not classified as an
engine, which is operated on track for inspection or maintenance. It may not shunt track circuits or
operate signals and will be governed by rules and special instructions for trains other than passenger
trains.
Interlocking (INT) - CORRECT ANSWER An arrangement of signals and signal appliances so
interconnected that their movements must succeed each other in proper sequence and for which
interlocking rules are in effect.
Interlocking Limits - CORRECT ANSWER The tracks between the extreme opposing home
signals of an interlocking.
Pilot - CORRECT ANSWER An employee assigned to a train or track car when the engineer,
conductor or track car driver is not qualified on the physical characteristics or rules of the railroad or
portion of the railroad over which the movement is to be made.
Aspect - CORRECT ANSWER The appearance of a fixed signal WHICH CONVEYS AN
INDICATION as viewed from the direction of an approaching train; the appearance of a cab signal
indicator as viewed in the engine control compartment.
