Page 1 of 24
IMSA / Traffic Signal Technician Level II (Latest 2025
Updates STUDY BUNDLE WITH COMPLETE SOLUTIONS)
Questions and Verified Answers | Grade A | 100%
Correct
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? .....ANSWER.....1
On a 2070 MMU monitor unit, how does the field tech program
allowable phases? .....ANSWER.....Remove 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? .....ANSWER.....Yes, it by-
passes the conflict feature and will not flash
,Page 2 of 24
On a NEMA CMU program card, how does the signal tech
program allowable phases? .....ANSWER.....Install copper jumpers
and soldering them on the program card
According to best maintenance practices, how often should
CMU/MMU be tested? .....ANSWER.....Annually
The MMU indicates a RED-FAIL fault on phase 6. Why?
.....ANSWER.....The 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 .....ANSWER.....Controller health
When a Technician is recertifying the CMU/MMU at an
intersection, what should the technician do to have the intersection
exit flash? .....ANSWER.....Replace the CMU/MMU with a newly
tested unit
, Page 3 of 24
Absence of all colors on a load switch will be indicated by what
fault on an MMU or MMU2? .....ANSWER.....Red Fail
Which of the following can be programmed on an MMU to latch
after a fault occurs? .....ANSWER.....Field check
How often is an MMU's clock updated from the controller?
.....ANSWER.....Once a second
In a signal cabinet, on the signal monitor, what does a field check
indicate? .....ANSWER.....The 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? .....ANSWER.....NEMA 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
IMSA / Traffic Signal Technician Level II (Latest 2025
Updates STUDY BUNDLE WITH COMPLETE SOLUTIONS)
Questions and Verified Answers | Grade A | 100%
Correct
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? .....ANSWER.....1
On a 2070 MMU monitor unit, how does the field tech program
allowable phases? .....ANSWER.....Remove 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? .....ANSWER.....Yes, it by-
passes the conflict feature and will not flash
,Page 2 of 24
On a NEMA CMU program card, how does the signal tech
program allowable phases? .....ANSWER.....Install copper jumpers
and soldering them on the program card
According to best maintenance practices, how often should
CMU/MMU be tested? .....ANSWER.....Annually
The MMU indicates a RED-FAIL fault on phase 6. Why?
.....ANSWER.....The 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 .....ANSWER.....Controller health
When a Technician is recertifying the CMU/MMU at an
intersection, what should the technician do to have the intersection
exit flash? .....ANSWER.....Replace the CMU/MMU with a newly
tested unit
, Page 3 of 24
Absence of all colors on a load switch will be indicated by what
fault on an MMU or MMU2? .....ANSWER.....Red Fail
Which of the following can be programmed on an MMU to latch
after a fault occurs? .....ANSWER.....Field check
How often is an MMU's clock updated from the controller?
.....ANSWER.....Once a second
In a signal cabinet, on the signal monitor, what does a field check
indicate? .....ANSWER.....The 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? .....ANSWER.....NEMA 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
