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IMSA TRAFFIC SIGNAL TECHNICIAN 2 EXAM | WITH COMPLETE
QUESTIONS AND ANSWERS | 2025/206 LATEST UPDATED | 100 %
RATED AND VERIFIED SOLUTIONS | GET AN A+
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
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
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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
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
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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
times? - (ANSWER)Traffic Engineer
An older TS1 cabinet experiences a flash condition but the signal heads are also showing active
green, yellow, and red indications. What is the MOST COMMON issue? - (ANSWER)The
mercury contactor is stuck in the normal position.
In a Dual-Ring, 8-phase traffic signal controller, how many phases can run in each ring at the
same
time? - (ANSWER)1
IMSA TRAFFIC SIGNAL TECHNICIAN 2 EXAM | WITH COMPLETE
QUESTIONS AND ANSWERS | 2025/206 LATEST UPDATED | 100 %
RATED AND VERIFIED SOLUTIONS | GET AN A+
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
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
,2|Page
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
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
, 3|Page
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
times? - (ANSWER)Traffic Engineer
An older TS1 cabinet experiences a flash condition but the signal heads are also showing active
green, yellow, and red indications. What is the MOST COMMON issue? - (ANSWER)The
mercury contactor is stuck in the normal position.
In a Dual-Ring, 8-phase traffic signal controller, how many phases can run in each ring at the
same
time? - (ANSWER)1
