IMSA TRAFFIC SIGNAL TECHNICIAN 2
QUESTIONS & ANSWERS FOR
GUARANTEED PASS | NEWEST UPDATE.
Terms in this set (104) VERIFIED ANSWER
1. In a TS2 cabinet, how many times can the 1
MMU experience a "Port 1 Fail" in a 24
hour period before
the fault is latched?
2. On a 2070 MMU monitor unit, how does Remove diode on program card for
the field tech program allowable phases? allowable phases
3. On an MMU, is it possible to tape the Yes, it by-passes the conflict feature
reset button to prevent the traffic signal and will not flash
from going into flash?
4. On a NEMA CMU program card, how Install copper jumpers and soldering
does the signal tech program allowable them on the program card
phases?
5. According to best maintenance practices, Annually
how often should CMU/MMU be tested?
6. The MMU indicates a RED-FAIL fault The load switch/switch pack
on phase 6. Why? produces no outputs.
,7. The purpose of the controller CVM Controller health
(Controller Voltage Monitor) output is to
allow the CMU/MMU to
monitor the
8. When a Technician is recertifying the Replace the CMU/MMU with a
CMU/MMU at an intersection, what newly tested unit
should the technician do to have the
intersection exit flash?
9. Absence of all colors on a load switch Red Fail
will be indicated by what fault on an
MMU or MMU2?
10. Which of the following can be Field check
programmed on an MMU to latch after a
fault occurs?
11. How often is an MMU's clock updated Once a second
from the controller?
12. In a signal cabinet, on the signal monitor, The signal indications don't match
what does a field check indicate? the controller output for a phase
13. A NEMA CMU/MMU uses a program NEMA monitors have wire jumpers
card to tell the monitor which phases are missing in all positions, the tech
permitted to run together. Which answer solders the ones in that allow phases
is CORRECT? to run together.
14. When the controller timings DO NOT Traffic Engineer
, match the timing sheet, who should be
contacted for correct
times?
15. An older TS1 cabinet experiences a flash The mercury contactor is stuck in the
condition but the signal heads are also normal position.
showing active green, yellow, and red
indications. What is the MOST
COMMON issue?
16. In a Dual-Ring, 8-phase traffic signal 1
controller, how many phases can run in
each ring at the same
time?
17. Observations indicate that vehicles are Improper detection phase assignment
being detected in one lane and that this is programming in the controller
shown on the detection interface unit.
However, the controller does not show
any detection for that phase. This could
be caused by
18. As soon as vehicles leave the detection no extension time programmed.
zone of an approach that has met its
minimum green time, a signal
immediately goes to yellow from the
green display. This could be a result of
QUESTIONS & ANSWERS FOR
GUARANTEED PASS | NEWEST UPDATE.
Terms in this set (104) VERIFIED ANSWER
1. In a TS2 cabinet, how many times can the 1
MMU experience a "Port 1 Fail" in a 24
hour period before
the fault is latched?
2. On a 2070 MMU monitor unit, how does Remove diode on program card for
the field tech program allowable phases? allowable phases
3. On an MMU, is it possible to tape the Yes, it by-passes the conflict feature
reset button to prevent the traffic signal and will not flash
from going into flash?
4. On a NEMA CMU program card, how Install copper jumpers and soldering
does the signal tech program allowable them on the program card
phases?
5. According to best maintenance practices, Annually
how often should CMU/MMU be tested?
6. The MMU indicates a RED-FAIL fault The load switch/switch pack
on phase 6. Why? produces no outputs.
,7. The purpose of the controller CVM Controller health
(Controller Voltage Monitor) output is to
allow the CMU/MMU to
monitor the
8. When a Technician is recertifying the Replace the CMU/MMU with a
CMU/MMU at an intersection, what newly tested unit
should the technician do to have the
intersection exit flash?
9. Absence of all colors on a load switch Red Fail
will be indicated by what fault on an
MMU or MMU2?
10. Which of the following can be Field check
programmed on an MMU to latch after a
fault occurs?
11. How often is an MMU's clock updated Once a second
from the controller?
12. In a signal cabinet, on the signal monitor, The signal indications don't match
what does a field check indicate? the controller output for a phase
13. A NEMA CMU/MMU uses a program NEMA monitors have wire jumpers
card to tell the monitor which phases are missing in all positions, the tech
permitted to run together. Which answer solders the ones in that allow phases
is CORRECT? to run together.
14. When the controller timings DO NOT Traffic Engineer
, match the timing sheet, who should be
contacted for correct
times?
15. An older TS1 cabinet experiences a flash The mercury contactor is stuck in the
condition but the signal heads are also normal position.
showing active green, yellow, and red
indications. What is the MOST
COMMON issue?
16. In a Dual-Ring, 8-phase traffic signal 1
controller, how many phases can run in
each ring at the same
time?
17. Observations indicate that vehicles are Improper detection phase assignment
being detected in one lane and that this is programming in the controller
shown on the detection interface unit.
However, the controller does not show
any detection for that phase. This could
be caused by
18. As soon as vehicles leave the detection no extension time programmed.
zone of an approach that has met its
minimum green time, a signal
immediately goes to yellow from the
green display. This could be a result of
