IMSA TRAFFIC SIGNAL TECHNICIAN 2 NEWEST ACTUAL EXAM
WITH COMPLETE QUESTIONS AND ANSWERS//
VERIFIED//GRADED A+// PDF – STUDY GUIDE UPDATE
(VERIFIED ELABORATIONS)
The purpose of the controller CVM (Controller Voltage Monitor)
output is to allow the CMU/MMU to
monitor the
Controller health
When a Technician is recertifying the CMU/MMU at an
intersection, what should the technician do to have the
intersection exit flash?
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?
Red Fail
Which of the following can be programmed on an MMU to latch
after a fault occurs?
Field check
Page 1 of 24
,How often is an MMU's clock updated from the controller?
Once a second
In a signal cabinet, on the signal monitor, what does a field
check indicate?
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?
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?
Traffic Engineer
Page 2 of 24
, 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?
The mercury contactor is stuck in the normal position.
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?
1
On a 2070 MMU monitor unit, how does the field tech program
allowable phases?
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?
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?
Install copper jumpers and soldering them on the program
card
Page 3 of 24
WITH COMPLETE QUESTIONS AND ANSWERS//
VERIFIED//GRADED A+// PDF – STUDY GUIDE UPDATE
(VERIFIED ELABORATIONS)
The purpose of the controller CVM (Controller Voltage Monitor)
output is to allow the CMU/MMU to
monitor the
Controller health
When a Technician is recertifying the CMU/MMU at an
intersection, what should the technician do to have the
intersection exit flash?
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?
Red Fail
Which of the following can be programmed on an MMU to latch
after a fault occurs?
Field check
Page 1 of 24
,How often is an MMU's clock updated from the controller?
Once a second
In a signal cabinet, on the signal monitor, what does a field
check indicate?
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?
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?
Traffic Engineer
Page 2 of 24
, 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?
The mercury contactor is stuck in the normal position.
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?
1
On a 2070 MMU monitor unit, how does the field tech program
allowable phases?
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?
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?
Install copper jumpers and soldering them on the program
card
Page 3 of 24
