IMSA Signal Technician Level 1 Questions and Answers
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IMSA Signal Technician Level 1
Institution
IMSA Signal Technician Level 1
IMSA Signal Technician Level 1 Questions and Answers
Computer science (Cambridge College)
IMSA Signal Technician Level 1 Questions and Answers
lOMoARcPSD|lOMoARcPSD|
IMSA Signal Technician Level 1 Questions and Answers
Which of the following is a definition for initial green time: CORRECT...
IMSA Signal Technician Level 1 Questions and
Answers
Computer science (Cambridge College)
IMSA Signal Technician Level 1 Questions and
Answers
lOMoARcPSD|47166518lOMoARcPSD|47166518
IMSA Signal Technician Level 1 Questions and Answers
Which of the following is a definition for initial green time: CORRECT ANSWER: Minimum time
that
the green indication must be displayed
The only point in the cycle of a coordinated traffic signal controller where the major-street phase is
allowed to end is called: CORRECT ANSWER: Yield point
Which of the following is NOT a common mode of operation for timing plans in a signal system:
CORRECT ANSWER: Y: Time of day
N: Traffic related
Y: Traffic Responsive
Y: Traffic adaptive
Two common terms to describe traffic signal supports and signal heads are: CORRECT ANSWER:
Rigid and free-swinging
In a single wire with a single point attachment configuration, the wire that supports the signal head is
called the: CORRECT ANSWER: Messenger wire
The two nominal diameter sizes for vehicular signal lenses are: CORRECT ANSWER: 8 in (200 mm)
and 12 in (300 mm)
The purpose for "louvers" is to: CORRECT ANSWER: Make signal visible from a specific lane
Which of the following types of conduit are used for traffic signals? CORRECT ANSWER: Rigid
Steel
Conduit
High-Density Polyethylene (HDPE)
PVC Schedule 40
, Traffic signal supports are NOT used to display the following items: CORRECT ANSWER: Y: Guide
Which of the following is a disadvantage of mast arms: CORRECT ANSWER: Large foundations
Methods of signal supports include all of these except: CORRECT ANSWER: N: Arched supports
Y: Truss supports
Y: Monotube supports
Y: Pedestal supports
Components of the optical unit for an incandescent lamp include all of the following except:
CORRECT
ANSWER: Y: Lamp socket
N: Shade
Y: Lens
Y: Reflector
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For pedestrian signals controlling crosswalks less than 100 feet, what is the required height of the
symbols themselves: CORRECT ANSWER: At least 6 inches
Loop detectors operate on the principle of: CORRECT ANSWER: Inductance
The piece of cable that connects the controller cabinet to the loops is called a: CORRECT ANSWER:
Lead-in cable
The outer jacket of loop lead-in cable is typically made of: CORRECT ANSWER: Polyethylene
What is the advantage of video detection systems? CORRECT ANSWER: Images can be sent to
remote locations
Which of the following is a type of microwave detector? CORRECT ANSWER: Frequency-
modulated
continuous wave (FMCW)
A 6' X 60' loop typically has how many turns of wire: CORRECT ANSWER: Two
The primary function of the CMU is: CORRECT ANSWER: Prevent conflicting signal indications
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