Exam (elaborations)
IMSA Signal I Questions and Answers 2024
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Exam of 5 pages for the course IMSA Signal technician at IMSA Signal technician (IMSA Signal I)
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IMSA Signal ISafety Education - answer Primary function of the IMSA
International Municipal Signal Association – answer IMSA Stands for:
Circular Red, Circular Green - answer What are the sections of a ramp meter signal?
Personal Protective Equipment – answer PPE Stands for:
Ensure advance warning devices have not been removed or relocated - answer A work
zone supervisor is responsible for:
three-section traffic signal with circular red, circular yellow, smaller circular yellow
indications - answer Example of the configuration of an Emergency-Vehicle Control
signal
Min green, passage time, max green - answer The green interval is made up of what
three components?
Min, max, ped - answer What are the three typical types of recall features of a traffic
signal controller?
Split - answerIn a coordination plan, what is the number of seconds given to each phase
at the intersection?
Time-based coordination - answerwhich of the following traffic signal coordination
methods is typically the least expensive?
The elapsed time between the start of a specific display until that display comes up
again - answercycle length
the elapsed time between the start of a specific display until that display comes up
again - answerWhat is a definition for cycle length?
They cannot occur at the same time - answerWhat is a characteristic of a sequential
phase?
Minimum time that the green indication must be displayed - answerA definition for initial
green time
, Yield point - answerthe only point in a cycle of a coordinated traffic signal controller
where the major-street phase is allowed to end
Rigid and free-swinging - answertwo common terms to describe traffic signal supports
and signal heads are:
messenger wire - answerin a single wire with a single point attachment configuration,
the wire that supports the signal heads is called the:
8 in, 12 in - answerthe two nominal diameter sizes for vehicular signal lenses are:
make signal visible from a specific lane - answerthe purposes of *louvers* is to:
Rigid steel conduit, high density polyethylene (HDPE), PVC schedule 40 -
answerconduit types for traffic signals
large foundation - answera disadvantage of mast arms
Lamp socket, lens, reflector - answercomponents of the optical unit for an incandescent
lamp
truss supports, monotube supports, pedestal supports - answermethods of signal
supports
at least 6" - answerfor pedestrian signals controlling crosswalks less than 100 feet, what
is the required height of the symbols themselves:
Inductance - answerloop detectors operate on the principle of:
lead-in cable - answerthe piece of cable that connects the controller cabinet to the loops
is called a:
polyethylene - answerthe outer jacket of loop lead-in cable is typically made of:
Images can be sent to remote locations - answerwhat is an advantage of video
detection systems?
Frequency-modulated continuous wave (FMCW) - answerA type of microwave detector
Two - answera 6'x60' loop typically has how many turns of wire?
prevent conflicting signal indications - answerthe primary function of the CMU is:
power supply wires, conduit riser with weatherhead, meter housing - answerwhat are
some components of an overhead power service?
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