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ISMA TRAFFIC SIGNAL TECHNICIAN II EXAM QUESTIONS AND CORRECT ANSWERS
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ISMA TRAFFIC SIGNAL TECHNICIAN II EXAM QUESTIONS AND CORRECT ANSWERS
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HOSMERITISMA TRAFFIC SIGNAL TECHNICIAN II EXAM
QUESTIONS AND CORRECT ANSWERS
A 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
FMCW microwave detectors can detect "what" in addition to volume, occupancy, classification
and speed? - correct answer-Vehicle presence
For NEMA type controllers positions not having jumpers are considered as? - correct answer-
Conflicts
How are "blank-out" signs illuminated? - correct answer-Internally
How are vehicle phases typically numbered? - correct answer-1 through 8
How do dial up modems function? - correct answer-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? - correct answer-Transmitter located in the
emergency vehicle
Receiver located at the intersections
How is advanced loop placement calculated using what factors? - correct answer-Speed of the
vehicles approaching the intersection
Safe stopping distance
How is stationary emergency vehicle preemption typically activated - correct answer-When an
emergency responder depresses a pushbutton located within the facility .
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