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IMSA Traffic Signal Technician Level II Test 1 |
(Latest 2025 / 2026 Update) Questions and Verified
Answers | Grade A | 100% Correct
Question:
What organization has established requirements for PPE in certain working situations?
Answer:
OSHA/CCOHS
Question:
Which of the following certifications must be attained first?
Answer:
Traffic signal Tech. Level 1
Question:
Upgrades or revisions to the traffic signal are the responsibility of whom?
Answer:
professional engineer
Question:
What is NOT an example of documentation that can limit the liability of the technician and/or agency?
Answer:
NTCIP
Question:
What is the single most important focus that the field technician should have?
Answer:
safety
Question:
For many agencies, what is the least amount of technicians required to perform work with an aerial lift?
Answer:
Question:
What is NOT true when it comes to dealing with the public?
Answer:
If you are unsure of the answer, give them the incorrect information so you can keep working
Question:
What is NOT a function of a modern traffic signal controller?
Answer:
Processing when a vehicle has run a red light and informing the police
Answer:
Bus interface unit
Question:
What was the intent of developing the ATC specifications?
Answer:
To have an open architecture hardware and software platform for ITS application
Question:
Which agency developed a communications protocol for ITS systems, field devices and software so basic functionality should be interchangeable regardless of the manufacturer?
Answer:
NTCIP
Question:
Before beginning work that requires workers or vehicles to be in or over the roadway, what should traffic signal field technicians ensure is in place?
Answer:
Temporary traffic control (TTC)
Question:
What is NOT a common type of truck used for traffic signal maintenance?
Answer:
dump truck
Question:
Traffic signals can be attached to Mast Arms using which of the following?
Answer:
- disconnect hangers attached to the mast arm which suspend the signal
- bracket that is rigidly mounted to the mast arm with a clamping device
- pipe mounts that screw into nipples installed directly into the mast arm
- ALL of the above all of the above
Question:
Traffic signal supports are NOT used to display the following items:
Answer:
advertisements
Question:
Methods of signal supports include what?
Answer:
Truss supports, monotube supports, pedestal supports
Question:
What is NOT an advantage of attaching signals to mast arms with brackets?
Answer:
Question:
What device minimizes the amount of voltage that might be available at a pedestrian push button should the button malfunction?
Answer:
Isolator
Question:
Which of the following combinations would cause the signal to enter flashing mode according to NEMA?
Answer:
green & yellow yellow & red walk & yellow
Question:
What feature is included in the 170 or 2070 monitors vs. the NEMA monitor?
Answer:
plug in
Question:
Which group of features best describes why malfunction monitoring units are more advanced then conflict monitors?
Answer:
ethernet connections
monitoring SDLC communications RS-232 communications port
Question:
Which type of power supply lines are attached from the power supply (service) inside the power panel?
Answer:
- 120 v, 40 H, single phase, AC+ and AC-
- 120 v, 60 H, single phase DC+ and DC-
- 120 v, 60 H, single phase AC+ and AC-
- 240 v, 60 H, single phase AC+ and AC- 120 v, 60H, single phase, AC+ and AC-
Question:
What is NOT an improved feature of the NEMA TS-2 power supply, when compared to the NEMA TS-1 power supply?
Answer:
24 V DC power for solar panels
Question:
At what time can a mercury contactor be disposed of in a typical trash collection receptacle? it can never happen
Answer:
Voltage is the electrical driver that moves what type of charged electrons through wires and electrical devices?
Answer:
negatively charged
Question:
Lightly to moderately doped semiconductor is referred to as?
Answer:
extrinsic
Question:
Which of the following is a 2 terminal device?
Answer:
diode
Question:
What is ideal for switching both small and large AC voltages and currents for power control purposes?
Answer:
TRIAC
Question:
How much current would flow if a circuit has a voltage of 4 volts and a resistance of 4 ohms? (voltage/resistance = current)
Answer:
one amp
Question:
List semiconductor devices?
Answer:
diodes and transistors SCRs and TRIACs LEDs
Question:
What is a characteristic that can be applied to a digital multimeter?
Answer:
automatic ranging of measurements
Question:
To avoid injury, at what voltage should a current measurement NOT be attempted on an open circuit?
Answer:
above the rated voltage of the meter
Question:
Pertaining to multimeter, what does VOM stand for?
Answer:
Question:
What does OTDR mean?
Answer:
optical time domain reflectometer
Question:
In what type of controller is the cycle sometimes called a "dial" because a rotating dial is used to control the timing of the various signal displays?
Answer:
older electromechanical
Question:
List 2 things that describe the vehicle movement made at an intersection?
Answer:
direction of approach manuever
Question:
In usual convention, how are through phases numbered?
Answer:
in a clockwise direction starting with phase 2
Question:
Some agencies refer to a combination of movements as a phase. This is also true in some older controller assemblies that operate with what maximum amount of phases?
Answer:
Question:
When it comes to barriers for dual ring controllers there are _______ barriers, one for leaving ________ street and one for leaving ________ street
Answer:
2, major, minor
Question:
Is this true about an independent overlaps: An independent overlap follows a designated phase
Answer:
no
Question:
Parent/child overlaps are the most common type of overlap. The overlap is viewed as the ________ because it is only present when one or more phase is active, which is referred to as the
Answer:
child, parent
Question:
This left turn phase is defined as "both modes occur on an approach during the same cycle"?
Question:
What is the time relationship determined by the difference between a fixed point in the cycle length and a system reference point?
Answer:
offset
Question:
What are the components of volume-density signal timings?
Answer:
gap reduction
Question:
What are factors of gap reduction allowing for extension/passage time to be reduced?
Answer:
time to reduce Passage time is a function of:
Answer:
distance from the stop line to the detector
Question:
What should be considered when determining yellow interval timings?
Answer:
formula recommendations from the responsible agency engineering judgement
Question:
What is developed to provide a degree of consistency that should allow traffic to progress through a number of intersection without stopping?
Answer:
traffic signal coordination timings
Question:
Splits are typically programmed as seconds but can also be programmed as what?
Answer:
% of the cycle length
Question:
All phases of a coordinated operation with the exception of "hold" phases are terminated by what?
Answer:
force offs
Question:
What periods control when and over what time duration the controller is allowed to service coordinated phases?
isolators
Question:
Transit property operates by providing which of the following scenarios?
Answer:
green indication is extended to provide additional green time for the transit vehicle
Question:
Out of pavement (non-intrusive) detection includes which of the following?
Answer:
microwave video radar
Question:
With an inductive loop, what energizes the wires placed in the pavement?
Answer:
loop detector amplifier
Question:
What is an advantage associated with inductance loops?
Answer:
maintenance is simplified
Question:
Why is the installation of inductive loop detectors the most labor intensive type of vehicle detections systems?
Answer:
- it uses more materials than other types of detection systems
- the installation requires many workers
- the loop wire must not have any kinks, no breaks in insulation, and have a solid watertight splice to the lead in cable
Question:
Which type of loop detector offers the greatest range of capabilities?
Answer:
multiple channel loop detectors
Question:
_____________ are needed to be adjusted to eliminate any detection irregularities due to interference problems with detectors?
Answer:
frequency and sensitivity
Question:
What types of loops are used for traffic count purposes and for coordinating the traffic signal system based upon real-time traffic volumes?
Answer:
