LIRR SIGNAL ASSISTANT EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS 2025
Block - ANSWERSA 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 - ANSWERSA 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.
Block signal - ANSWERSA fixed signal or hand signal in the absence of a fixed signal,
at the entrance to a block that governs trains using that block.
Maximum authorized speed (MAS) - ANSWERSThe highest speed that is permitted
over a specific portion of the rail road. It may be authorized by the special instructions of
the current timetable, rules of the operating department or any other publication
authorized by the general superintendent- transportation.
Medium speed - ANSWERSA speed not exceeding 30 mph, except In ASC territory,
train will be governed by speed displayed on the cab signal indicator not to exceed 40
mph.
Automatic block signal system - ANSWERSA block signal system wherein the use of
each block is governed by an automatic block signal, the cab signal indicator or both.
Manual block signal system - ANSWERSA 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.
Interlocking - ANSWERSAn 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.
Block-limit signal - ANSWERSA fixed signal indicating the limit of the block, the use of
which is governed by manual block signal system rules.
Slow speed - ANSWERSA speed not exceeding 15 mph, except in ASC territory, train
will be governed by speed displayed on the cab signal indicator not to exceed 30 mph.
QUESTIONS WITH COMPLETE
SOLUTIONS 2025
Block - ANSWERSA 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 - ANSWERSA 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.
Block signal - ANSWERSA fixed signal or hand signal in the absence of a fixed signal,
at the entrance to a block that governs trains using that block.
Maximum authorized speed (MAS) - ANSWERSThe highest speed that is permitted
over a specific portion of the rail road. It may be authorized by the special instructions of
the current timetable, rules of the operating department or any other publication
authorized by the general superintendent- transportation.
Medium speed - ANSWERSA speed not exceeding 30 mph, except In ASC territory,
train will be governed by speed displayed on the cab signal indicator not to exceed 40
mph.
Automatic block signal system - ANSWERSA block signal system wherein the use of
each block is governed by an automatic block signal, the cab signal indicator or both.
Manual block signal system - ANSWERSA 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.
Interlocking - ANSWERSAn 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.
Block-limit signal - ANSWERSA fixed signal indicating the limit of the block, the use of
which is governed by manual block signal system rules.
Slow speed - ANSWERSA speed not exceeding 15 mph, except in ASC territory, train
will be governed by speed displayed on the cab signal indicator not to exceed 30 mph.
