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ISMA Traffic Signal Technician II questions and answers
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ISMA Traffic Signal Technician II questions and answers
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ISMA Traffic Signal Technician IIA forerunner of the electronic controllers that we have today was the? - questions and
answers-Electro-mechanical controller
A microprocessor takes appropriate action to control intersection what? - questions and
answers-Timing
A multi-meter provides the ability to measure?(3) - questions and answers-DC and AC voltage
DC and AC current
Resistance
A split includes what three things associated with the phase? - questions and answers-Green
time
Yellow time
Red time
A standard multi-meter includes what three main measurement features? - questions and
answers-Voltage
Current
Resistance
Advanced loops are usually square point loop detectors that are placed? - questions and
answers-Upstream from the stop line
Ammeters are also known as?(5) - questions and answers-Clamp-on ammeter
Amprobe
Clamp meter
Current probe
Tong tester
An inductive loop assembly consist of? - questions and answers-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? - questions and answers-Eight-phase
An intersection will remain in flash mode until the monitor unit is? - questions and
answers-Reset
Analog multi-meter functions:(3) - questions and answers-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? - questions and
answers-"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? - questions and answers-40%
Because of the sensitivity to impedance variations, a TDR may be used to: (3) - questions and
answers-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? -
questions and answers-Articulating boom
Controllers typically have what two types of ring operation? - questions and answers-Single
Dual
Define TDR? - questions and answers-Time domain reflectometer
Define the acronym NTCIP - questions and answers-National Transportation Communications
for Intelligent transportation systems Protocol
Describes the direction of approach and the maneuver made at the intersection? - questions
and answers-(Vehicle) Movement
Dial-up modems provide what in relation to the transition of data? - questions and
answers-Reliability
Efficiency
Digital multi-meter functions:(5) - questions and answers-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: - questions and
answers-Green interval
Yellow change interval
Red clearance interval
, Emergency vehicles should be set to which level of priority? - questions and answers-Medium
priority
Factors used to determine the most appropriate time for an all red clearance include: -
questions and answers-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. -
questions and answers-Red-red flashing mode
FMCW microwave detectors can detect "what" in addition to volume, occupancy, classification
and speed? - questions and answers-Vehicle presence
For NEMA type controllers positions not having jumpers are considered as? - questions and
answers-Conflicts
How are "blank-out" signs illuminated? - questions and answers-Internally
How are vehicle phases typically numbered? - questions and answers-1 through 8
How do dial up modems function? - questions and answers-Data transmitted to the dial-up line,
then over telephone company's infrastructure back to the central computer
How does a mobile emergency preemption operate? - questions and answers-Transmitter
located in the emergency vehicle
Receiver located at the intersections
How is advanced loop placement calculated using what factors? - questions and
answers-Speed of the vehicles approaching the intersection
Safe stopping distance
How is stationary emergency vehicle preemption typically activated - questions and
answers-When an emergency responder depresses a pushbutton located within the facility .
How is the preemption input activated typically? - questions and answers-When the transmitter
gets close enough to the receiver for the emitted signal to be detected by the receiver.
How is the Type 179 controller specification similar to the 170 specification?(2) - questions and
answers-Open architecture
Allows for interchangeability of components
How many seconds for a major street through phase? - questions and answers-15 to 25
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