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ISMA Traffic Signal Technician II Questions AND ANSWER
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ISMA Traffic Signal Technician II Questions AND ANSWER
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ISMA Traffic Signal Technician IIA forerunner of the electronic controllers that we have today was the? - correct
answer-Electro-mechanical controller
A microprocessor takes appropriate action to control intersection what? - correct
answer-Timing
A multi-meter provides the ability to measure?(3) - correct answer-DC and AC voltage
DC and AC current
Resistance
A split includes what three things associated with the phase? - correct answer-Green time
Yellow time
Red time
A standard multi-meter includes what three main measurement features? - correct
answer-Voltage
Current
Resistance
Advanced loops are usually square point loop detectors that are placed? - correct
answer-Upstream from the stop line
Ammeters are also known as?(5) - correct answer-Clamp-on ammeter
Amprobe
Clamp meter
Current probe
Tong tester
An inductive loop assembly consist of? - correct answer-Detector amplifier
Lead in cable
Insulated loop wire
Shallow slot sawed in pavement
An intersection that has four through phases and four protected left-turn phases is said to be
an "what" intersection? - correct answer-Eight-phase
An intersection will remain in flash mode until the monitor unit is? - correct answer-Reset
Analog multi-meter functions:(3) - correct answer-Low impedance
Fast meter reaction time(measurement time)
Provides a quick go or no-go indication
As sensitivity is increased a loop detector has a tendency to do what? - correct
answer-"Lock" or place a constant call
, Battery backup system manufactures claim that switching to red flashing operation at "what
battery" level percent significantly extends run time? - correct answer-40%
Because of the sensitivity to impedance variations, a TDR may be used to: (3) - correct
answer-Verify cable impedance characteristics
Splice and connector locations
Estimate cable lengths
Bucket trucks may have a boom that is capable of rotating and extending which is called? -
correct answer-Articulating boom
Controllers typically have what two types of ring operation? - correct answer-Single
Dual
Define TDR? - correct answer-Time domain reflectometer
Define the acronym NTCIP - correct answer-National Transportation Communications for
Intelligent transportation systems Protocol
Describes the direction of approach and the maneuver made at the intersection? - correct
answer-(Vehicle) Movement
Dial-up modems provide what in relation to the transition of data? - correct answer-Reliability
Efficiency
Digital multi-meter functions:(5) - correct answer-High input impedance
Automatic ranging of measurements
Automatic polarity identification
Sample and hold circuitry
Provides a greater number of testing functions
Each vehicular phase is usually comprised of three specific intervals: - correct answer-Green
interval
Yellow change interval
Red clearance interval
Emergency vehicles should be set to which level of priority? - correct answer-Medium priority
Factors used to determine the most appropriate time for an all red clearance include: -
correct answer-Type of vehicular traffic
Driver characteristics
Pedestrian activity in the intersection
Flashing red indications are shown to every approach lane to the intersection. This type of
flashing operations essentially provides the same type of control as an all-way stop control. -
correct answer-Red-red flashing mode
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