IMSA Traffic Signal Technician Level 2
Exam (2025) | Complete Study Guide
with Verified Questions & Answers
In a TS2 cabinet, how many times can the MMU
experience a “Port 1 Fail” in a 24 hour period
before
The fault is latched? – Answer1
On a 2070 MMU monitor unit, how does the field
tech program allowable phases? – AnswerRemove
diode on program card for allowable phases
On an MMU, is it possible to tape the reset button
to prevent the traffic signal from going into flash? –
AnswerYes, it by-passes the conflict feature and will
not flash
On a NEMA CMU program card, how does the signal
tech program allowable phases? – AnswerInstall
,copper jumpers and soldering them on the
program card
According to best maintenance practices, how
often should CMU/MMU be tested? –
AnswerAnnually
The MMU indicates a RED-FAIL fault on phase 6.
Why? – AnswerThe load switch/switch pack
produces no outputs.
The purpose of the controller CVM (Controller
Voltage Monitor) output is to allow the CMU/MMU to
Monitor the – AnswerController health
When a Technician is recertifying the CMU/MMU at
an intersection, what should the technician do to
have the intersection exit flash? – AnswerReplace
the CMU/MMU with a newly tested unit
Absence of all colors on a load switch will be
indicated by what fault on an MMU or MMU2? –
AnswerRed Fail
, Which of the following can be programmed on an
MMU to latch after a fault occurs? – AnswerField
check
How often is an MMU’s clock updated from the
controller? – AnswerOnce a second
In a signal cabinet, on the signal monitor, what
does a field check indicate? – AnswerThe signal
indications don’t match the controller output for a
phase
A NEMA CMU/MMU uses a program card to tell the
monitor which phases are permitted to run
together. Which answer is CORRECT? –
AnswerNEMA monitors have wire jumpers missing
in all positions, the tech solders the ones in that
allow phases to run together.
When the controller timings DO NOT match the
timing sheet, who should be contacted for correct
Times? – AnswerTraffic Engineer
Exam (2025) | Complete Study Guide
with Verified Questions & Answers
In a TS2 cabinet, how many times can the MMU
experience a “Port 1 Fail” in a 24 hour period
before
The fault is latched? – Answer1
On a 2070 MMU monitor unit, how does the field
tech program allowable phases? – AnswerRemove
diode on program card for allowable phases
On an MMU, is it possible to tape the reset button
to prevent the traffic signal from going into flash? –
AnswerYes, it by-passes the conflict feature and will
not flash
On a NEMA CMU program card, how does the signal
tech program allowable phases? – AnswerInstall
,copper jumpers and soldering them on the
program card
According to best maintenance practices, how
often should CMU/MMU be tested? –
AnswerAnnually
The MMU indicates a RED-FAIL fault on phase 6.
Why? – AnswerThe load switch/switch pack
produces no outputs.
The purpose of the controller CVM (Controller
Voltage Monitor) output is to allow the CMU/MMU to
Monitor the – AnswerController health
When a Technician is recertifying the CMU/MMU at
an intersection, what should the technician do to
have the intersection exit flash? – AnswerReplace
the CMU/MMU with a newly tested unit
Absence of all colors on a load switch will be
indicated by what fault on an MMU or MMU2? –
AnswerRed Fail
, Which of the following can be programmed on an
MMU to latch after a fault occurs? – AnswerField
check
How often is an MMU’s clock updated from the
controller? – AnswerOnce a second
In a signal cabinet, on the signal monitor, what
does a field check indicate? – AnswerThe signal
indications don’t match the controller output for a
phase
A NEMA CMU/MMU uses a program card to tell the
monitor which phases are permitted to run
together. Which answer is CORRECT? –
AnswerNEMA monitors have wire jumpers missing
in all positions, the tech solders the ones in that
allow phases to run together.
When the controller timings DO NOT match the
timing sheet, who should be contacted for correct
Times? – AnswerTraffic Engineer
