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Traffic Signal Field Technician Exam Test Bank
2025 | Traffic Signal Technician Level 1 and 2 |
IMSA Traffic Signal Technician | International
Municipal Signal Association
Which type of loop detector offers the greatest range of capabilities? --------- CORRECT ANSWER-----------------multiple channel loop detectors _____________ are needed to be adjusted to eliminate any detection irregularities due to interference problems with detectors? ---------CORRECT ANSWER-----------------frequency and sensitivity What types of loops are used for traffic count purposes and for coordinating the traffic signal system based upon real-time traffic volumes? ---------CORRECT ANSWER-----------------system What is a disadvantage of video imaging detection systems? ---------CORRECT ANSWER-----------------maintenance requires advanced technical training Which advanced traffic control environment can distributed architecture NOT provide the necessary performance? ---------CORRECT ANSWER-----------------traffic coordinated control
What is the common term for a cable that transmits data between controllers and on-street masters/central computers? ---------CORRECT ANSWER----------------- hardwire Define POTS ---------CORRECT ANSWER-----------------plain old telephone service Which of the following is NOT a dip switch setting? ---------CORRECT ANSWER------- ----------cycle length What's true about fiber optic cables? ---------CORRECT ANSWER------------------can transmit data faster than older copper cables
- data can be sent sent in both directions are the same time
- can be utilized for closed circuit television feeds What is an advantage of single mode fiber optic cable over multi-mode fiber optic cable? ---------CORRECT ANSWER-----------------has a higher transmission rate than multi-mode fiber
Which of the following is NOT an IMSA certification? ---------CORRECT ANSWER----- ------------Traffic Signal Level III Bridge Technician Which of the following are potential safety hazards? ---------CORRECT ANSWER----- ------------overhead and underground power, gas, aerial lift equipment. Tra What are the sections of a ramp mete signal ---------CORRECT ANSWER--------------- --Circular red, circular green PPE stands for ---------CORRECT ANSWER-----------------Personal Protective Equipment A work zone supervisor is responsible for which of the following tasks: --------- CORRECT ANSWER-----------------Ensure advance warning devices have not been removed or relocated. Which of the following is NOT a sentence type in the MUTCD? Standards; requirement that have to be followed. Guidance; recommendations that are to be followed unless there I good reason not to.
Objectives; reasons behind the standards and guidance. Support; additional information to clarify the standards and guidance. --------- CORRECT ANSWER-----------------Objectives; reasons behind the standards and guidance Which of the following is an example configuration fo an Emergency - Vehicle Traffic Control Signals? ---------CORRECT ANSWER-----------------Thee section traffic signal with circular red, circular yellow, and smaller circular yellow indications A major distinguishing feature between NEMA TS-1 and TS-2 controllers is: --------- CORRECT ANSWER-----------------Data bus The advanced transportation controller was developed to provide: --------- CORRECT ANSWER-----------------Open architecture hardware and software platform Which of the following type of controller assemblies, without adapters, can accept multiple software platforms and be utilized in all types fo cabinets: --------- CORRECT ANSWER-----------------2070 controller What is another term for load switches used in 170/2070 controllers? --------- CORRECT ANSWER-----------------switch packs
Continuity is a type of test for ---------CORRECT ANSWER-----------------traffic signal conductors The most labor intensive type of vehicle detection installation is ---------CORRECT ANSWER-----------------inductive loop detection Which of the following 'start-up' items need to be completed by the contractor prior to the physical construction of the traffic signal ---------CORRECT ANSWER---- -------------Utilities notification and coordination, Public awareness as required by the agency, approval of traffic control plan. Which of the following equipment is NOT typically seen at the construction site of a traffic signal? ---------CORRECT ANSWER-----------------grader to create level intersections Free-swinging signal heads are located on which of the following support systems ---------CORRECT ANSWER-----------------span wires Traffic signals can be installed: ---------CORRECT ANSWER-----------------after justification is determined through a warrant study
A traffic signal warrant study can determine the need of installation through all of the following except: Traffic volumes that show insufficient gaps exist on the major street to allow minor street traffic to enter or cross an intersection. Road users at an intersection submitting a sufficient number of requests for installation of a signal based on local requirements. Pedestrian volumes indicate a need in order to allow safe crossing of a road Historical crash data shows that a signal would potentially improve safety conditions ---------CORRECT ANSWER-----------------Road users at an intersection submitting a sufficient number of requests for installation of a signal based on local requirements A plans preparation manual indicates information regarding: ---------CORRECT ANSWER-----------------Amount of detail, information, and proper format for traffic signal plans. EEO participation requires the contractor to: ---------CORRECT ANSWER--------------- --maintain a percentage of minority workers on the project.
What device dos a technician use to troubleshoot existing loops already installed in the field: ---------CORRECT ANSWER-----------------loop analyzer Resistance as expressed by Ohm's law is ---------CORRECT ANSWER----------------- R=E/I Ohm's law is useful in the design and troubleshooting of circuits and describes the mathematical relationship of the following: ---------CORRECT ANSWER----------------- voltage, current, resistance. The typical traffic signal controller assembly is powered by what type of electrical current: ---------CORRECT ANSWER-----------------120 volts of AC The two types of traffic signal maintenance that are typically performed are: ------- --CORRECT ANSWER-----------------Emergency and scheduled maintenance An example of emergency maintenance is: ---------CORRECT ANSWER----------------- power outages/surges due to electrical storm
A good nice step procedure for troubleshooting is: ---------CORRECT ANSWER------- ----------observe, identify, determine, correct, observe again Which of the following is NOT typically a maintenance concern for traffic signal installations: ---------CORRECT ANSWER-----------------Lubrication A Key component of documentation is: ---------CORRECT ANSWER----------------- Developing written procedures for documentation, developing checklists, developing field reports Which of the following is a characteristic o a good field report: ---------CORRECT ANSWER-----------------clearly written, concise, describes actions taken. Which of the following best describe traffic signal maintenance: ---------CORRECT ANSWER-----------------the repair or upkeep of the existing equipment and operations Checking for inconsistent indications, local construction activities, and if the signal is in flashing mode, would be an example of which of the 4 steps in the troubleshooting procedure: ---------CORRECT ANSWER-----------------Observe
Effective determination of the cause of a failure in a traffic signal is called: --------- CORRECT ANSWER-----------------troubleshooting What is the 5 step troubleshooting procedure ---------CORRECT ANSWER------------- ----1. observe 2 identify 3 determine 4 correct 5 observe again What is as important as performing the maintenance itself? ---------CORRECT ANSWER-----------------documentation of emergency maintenance. When should documentation of a failure begin? ---------CORRECT ANSWER----------- ------when a failure is traffic signal is first reported. A Circuit that is wired in series is one where: ---------CORRECT ANSWER--------------- --the current goes through all of the electrical components of the circuit A Circuit that is wired in Parallel is one where: ---------CORRECT ANSWER------------- ----each component has its own direct path.
Circuits are wired in__________ and ___________ ---------CORRECT ANSWER------- ----------series and parallel Ohm's law is a set of formulas that describe the mathematical relationship between: ---------CORRECT ANSWER-----------------Voltage (E), current (I), and resistance (R). What is a load switch tester also known as? ---------CORRECT ANSWER----------------
- Multi-switch tester A Load switch tester or multi-switch tester is used to: ---------CORRECT ANSWER--- --------------verify the correct operation of a load switch. The unit verified that the correct current outputs are within the acceptable range for operation. Slot testers are available that: ---------CORRECT ANSWER-----------------plug into the cabinet detector card rack and enable the technician to measure voltage, continuity and or resistance for each internal connection in the cabinet. A loop analyzer is a unit that: ---------CORRECT ANSWER-----------------a signal technician uses to troubleshoot existing loops and test newly installed loops
For many agencies, what is the least amount of technicians required to perform work with an aerial lift? ---------CORRECT ANSWER----------------- 2 What is NOT true when it comes to dealing with the public? ---------CORRECT ANSWER-----------------If you are unsure of the answer, give them the incorrect information so you can keep working What is NOT a function of a modern traffic signal controller? ---------CORRECT ANSWER-----------------Processing when a vehicle has run a red light and informing the police What was a major drawback with the first traffic signal controllers? --------- CORRECT ANSWER-----------------Maintaining the mechanical parts When did standardization of controllers become established in the United States and Canada? ---------CORRECT ANSWER-----------------1970s What was limited by the fourth proprietary connector used with the NEMA TS-1? ---------CORRECT ANSWER-----------------the type of replacement model
Which type of controller utilizes a high speed data channel between all major equipment to maximize the functionality and expandability of the controller assembly? ---------CORRECT ANSWER-----------------NEMA TS-2 Type 1 What greatly reduced wire connections in the controller cabinet with the use of the RS-485 with the SDLC? ---------CORRECT ANSWER-----------------Bus interface unit What was the intent of developing the ATC specifications? ---------CORRECT ANSWER-----------------To have an open architecture hardware and software platform for ITS application Which agency developed a communications protocol for ITS systems, field devices and software so basic functionality should be interchangeable regardless of the manufacturer? ---------CORRECT ANSWER-----------------NTCIP 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? --------- CORRECT ANSWER-----------------Temporary traffic control (TTC) What is NOT a common type of truck used for traffic signal maintenance? --------- CORRECT ANSWER-----------------dump truck
Traffic signals are not always where an aerial lift can be positioned properly. What should you always do when operating aerial lifts? ---------CORRECT ANSWER--------- --------Use the stabilizers to provide additional support when the lift is in operation Check for proper operating DC voltage, check for the absence of red on a phase that does not have green, yellow, or walk, check on a simultaneous are functions that are provided by both - ---------CORRECT ANSWER-----------------CMU and MMU What is the purpose of relays in a traffic signal system? ---------CORRECT ANSWER- ----------------to transfer the outputs from one component to another What device minimizes the amount of voltage that might be available at a pedestrian push button should the button malfunction? ---------CORRECT ANSWER-----------------Isolator Which of the following combinations would cause the signal to enter flashing mode according to NEMA? ---------CORRECT ANSWER-----------------green & yellow yellow & red walk & yellow What feature is included in the 170 or 2070 monitors vs. the NEMA monitor? ------ ---CORRECT ANSWER-----------------plug in
Which group of features best describes why malfunction monitoring units are more advanced then conflict monitors? ---------CORRECT ANSWER----------------- ethernet connections monitoring SDLC communications RS-232 communications port Which type of power supply lines are attached from the power supply (service) inside the power panel?
- 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- ---------CORRECT ANSWER----------------- 120 v, 60H, single phase, AC+ and AC- What is NOT an improved feature of the NEMA TS-2 power supply, when compared to the NEMA TS-1 power supply? ---------CORRECT ANSWER----------------
- 24 V DC power for solar panels At what time can a mercury contactor be disposed of in a typical trash collection receptacle? ---------CORRECT ANSWER-----------------it can never happen
