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IMSA Traffic Signal Technician 1 Questions And Answers 2025 IMSA Traffic Signal Technician 1 Questions And Answers 2025
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IMSA Traffic Signal Technician 1 Questions And Answers 2025 IMSA - ANSWER-The International Municipal Signal Association (IMSA) is the oldest known association of its kind in the world. The organization originated in 1896 and counts Thomas A. Edison and the Edison Electric Company among its esteemed
members. Today, IMSA certifies tens of thousands of technicians and stands as the most regarded name in public safety. First recorded attempt of regulating traffic flow with a mechanical signal? (where, when, who, how) - ANSWER-Where: London, England When: 1868 Who: J.P. Knight, railway engineer How: Featured rotating arms with symbols indicating stop and go Pivotal milestone of traffic signal? (Where, when, who, how) - ANSWER-Where: Salt Lake City When: 1912
NEMA - ANSWER-National Electrical Manufacturers Association - Founded in 1926, neutral forum of members made up of business leaders, electrical experts, engineers, scientists, technicians. ANSI-accredited Standards Developing Organization IMSA - ANSWER-International Municipal Signal Association NESC - ANSWER-National Electrical Safety Code
ITE - ANSWER-Institute of Transportation Engineers ATCC - ANSWER-Advanced Transportation Controller Cabinet ATC - ANSWER-Advanced Transportation Controller SDS - ANSWER-Safety Data Sheets Purpose of Safety Data Sheets - ANSWER-Offer safety information for chemicals you may use in your work environment, 16 sections, UN adopted Globally Harmonized System of Classification of Labeling & chemicals in 2003
3 common causes of accidents - ANSWER-1) Driver mistakes or distractions
d) Failure to act on behalf of the public - ANSWER-B: Failure to use reasonable care in one's actions A technician was sent out to an intersection to replace a broken traffic signal head. When he arrived on the scene, he realizes he does not have the proper hardware to reinstall the fixture. He only secures the fixture with two screws and leaves for the evening and forgets to come back to complete the repair. The fixture falls on a car and causes a serious accident with injuries. This is a what? - ANSWER-Gross negligence PPE - ANSWER-Personal Protective Equipment Importance of PPE - ANSWER-• Worker Safety.
Electrical Safety Gloves/Insulating Gloves - ANSWER-Class 00: Max use voltage of 500 volts AC, 750 DC Class 0: Max use voltage of 1,000 volts AC, DC Class 1: Max use voltage of 7,500 volts AC, 11,250 DC Class 2: Max use voltage of 17,000 volts AC, 25,500 DC Class 3: Max use voltage of 26,500 volts AC, 39,750 DC Class 4: Max use voltage of 36,000 volts AC, 54,000 DC Key aspects of work zone safety - ANSWER- Traffic control Communication Work Zone Layout
Speed Management Look up and live - ANSWER-Check for overhead wires Minimum clearance from overhead power lines?
Underground utilities: White - ANSWER- proposed excavation Underground utilities: Not specified - ANSWER- Military & private underground utilities Damaged utility notification - ANSWER-Secure the area, call 911 in event of hazard, identify damaged utility, call 811 to report and create damaged utility ticket, expose damaged utility if safe to do so What electrical gloves would you use to work near voltages of 1,000 VAC - ANSWER-Class 0
Multimeter - ANSWER-Measures voltage, resistance, current, and other things to diagnose electrical issues Load tester - ANSWER-Used to verify the integrity of batteries Fiber power tester - ANSWER-Used to measure the light loss in fiber LCR Meter - ANSWER-Measures inductance, capacitance, and resistance TDR/OTDR - ANSWER-Measures anomalies in wire or opitical fiber Megohmmeter - ANSWER-Measures conductor in insulation resistance
Load switch tester - ANSWER-verifies integrity of a load switch What meter would you use to check resistance?
Arc Flash - ANSWER-An arc Flash is an electrical explosion with a tremendous amount of pressure and heat. • Everything turns into molten metal upwards of 35,000 degrees Conductor - ANSWER-Conductors are materials that conduct electricity. Copper is common in wiring, and aluminum. Gold and silver used in electronics
I = current (amps) R = resistance (Ohms) Power formula - ANSWER-P = I x E P = Power (watts) I = current (amps) E= voltage (volts) Electric current types - ANSWER-DC = direct current - electrons flow in one direction AC = alternating current - electrons switch directions Series circuit - ANSWER-One string, current consistent at all points, only one path to flow
Parallel circuit - ANSWER-Voltage remains consistent, multiple strings. Traffic signal indications wired in parallel Combination - both series and parallel - ANSWER-Traffic signal loop detection can be wired in combination, series, or parallel Bonding - ANSWER-Connected to establish electrical continuity and conductivity. Ensures they are all continuous on an effective ground fault current path EGFCP - ANSWER-Effective ground fault current path. The EGFCP helps operate devices such as circuit breakers and fuses or ground-fault detectors in ungrounded systems. In grounded systems, it is important to bond the equipment grounding conductors to the system grounded
