IMSA TRAFFIC SIGNAL TECHNICIAN LEVEL II
PROFESSIONAL EXAMPREP 2026 TESTED
QUESTIONS AND SOLUTIONS FULL REVIEW
GRADED A+
◉ Bucket trucks may have a boom that is capable of rotating and
extending which is called? Answer: Articulating boom
◉ What are some disadvantages of an aerial platform lift?(4)
Answer: Only extends vertically
Cannot reach as high as boom trucks
Must be parked on flat ground
Must be positioned directly below work area.
◉ The primary purpose of the traffic signal monitor unit is to act as?
Answer: Guard against system malfunction
◉ If a malfunction is present the monitoring unit will automatically
put the intersection into what mode? Answer: Flashing condition
◉ An intersection will remain in flash mode until the monitor unit
is? Answer: Reset
,◉ The CMU and MMU checks the controller for what two things?
Answer: Proper power
Timing functions
◉ What will cause the monitor (CMU) to transfer the intersection
into flash mode?(3) Answer: Loss of power to the controller
The 24 volt DC voltage of the controller is lost
Time it takes to change from one indication to another is incorrect
◉ What does each conflict monitor have that is unique for that
particular intersection Answer: Program card
◉ What are short lengths of conductors on the program card called?
Answer: Jumpers
◉ On the program card jumpers are installed to tell the unit "what"
are considered compatible?(2) Answer: Movements
Channels
◉ For NEMA type controllers positions not having jumpers are
considered as? Answer: Conflicts
, ◉ Program cards for type 170 controllers use a "what" as a jumper
to wire the positions which are considered conflicts? Answer: Diode
◉ Why is it important to periodically review the monitor cards?
Answer: To be sure the jumpers are assigned correctly
◉ What is used to provide the required flash rate when the signal is
in flashing operation? Answer: Flasher unit
◉ The MUTCD requires that when a signal is flashed that the light
source be flashed at a rate of? Answer: Not less than 50 or more
than 60 times per minute
◉ What relays are a type of relay that is capable of switching high
levels of current? Answer: Mercury Contactor
◉ In a traffic signal cabinet the mercury contactor controls the 120
VAC to all of the? Answer: Load switches
◉ These devices are being replaced by many agencies due to what
type of concerns? Answer: Environmental
PROFESSIONAL EXAMPREP 2026 TESTED
QUESTIONS AND SOLUTIONS FULL REVIEW
GRADED A+
◉ Bucket trucks may have a boom that is capable of rotating and
extending which is called? Answer: Articulating boom
◉ What are some disadvantages of an aerial platform lift?(4)
Answer: Only extends vertically
Cannot reach as high as boom trucks
Must be parked on flat ground
Must be positioned directly below work area.
◉ The primary purpose of the traffic signal monitor unit is to act as?
Answer: Guard against system malfunction
◉ If a malfunction is present the monitoring unit will automatically
put the intersection into what mode? Answer: Flashing condition
◉ An intersection will remain in flash mode until the monitor unit
is? Answer: Reset
,◉ The CMU and MMU checks the controller for what two things?
Answer: Proper power
Timing functions
◉ What will cause the monitor (CMU) to transfer the intersection
into flash mode?(3) Answer: Loss of power to the controller
The 24 volt DC voltage of the controller is lost
Time it takes to change from one indication to another is incorrect
◉ What does each conflict monitor have that is unique for that
particular intersection Answer: Program card
◉ What are short lengths of conductors on the program card called?
Answer: Jumpers
◉ On the program card jumpers are installed to tell the unit "what"
are considered compatible?(2) Answer: Movements
Channels
◉ For NEMA type controllers positions not having jumpers are
considered as? Answer: Conflicts
, ◉ Program cards for type 170 controllers use a "what" as a jumper
to wire the positions which are considered conflicts? Answer: Diode
◉ Why is it important to periodically review the monitor cards?
Answer: To be sure the jumpers are assigned correctly
◉ What is used to provide the required flash rate when the signal is
in flashing operation? Answer: Flasher unit
◉ The MUTCD requires that when a signal is flashed that the light
source be flashed at a rate of? Answer: Not less than 50 or more
than 60 times per minute
◉ What relays are a type of relay that is capable of switching high
levels of current? Answer: Mercury Contactor
◉ In a traffic signal cabinet the mercury contactor controls the 120
VAC to all of the? Answer: Load switches
◉ These devices are being replaced by many agencies due to what
type of concerns? Answer: Environmental
