IMSA TRAFFIC SIGNAL TECHNICIAN LEVEL II
Types of rigid metallic conduit - ANSWERS-GRG (galvanized rigid conduit), IMC
(intermediate metallic conduit), EMT (electric metal tubing)
Types of rigid non metallic conduit - ANSWERS-PVC (polyvinyl chloride), HPE (high
density polyethylene)
Open conduits should be finished with - ANSWERS-a bushing
Two types of IMSA specified cable jacketing - ANSWERS-IMSA 19-1 spec (PVC
Jacket) and IMSA 20-1 spec (Polyethylene jacket (PE))
IMSA conductor wire sizes - ANSWERS-#10 awg to # 16 awg (#12 and #14ga
typical for traffic signals)
IMSA 7 conductor colors - ANSWERS-black, white red, green, orange, blue, white
w/ black
Rigid signal head mountign - ANSWERS-pipe & nipple, plumbizer (slip fitter),
Astrobrac
, Flexible signal head mounting - ANSWERS-balance hanger
Catenary - ANSWERS-the curved shape a chain or rope assumes once it is hung
and supported from both ends
Messenger cable size - ANSWERS-7 strand cable steel, 5/16" to 9/16" in diameter
Tether cable size - ANSWERS-1/4" to 7/16" in diameter
Signal face mounting height - ANSWERS-min 15' max 25.6'
Horizontal distance must be maintained from the face of curb for side of pole
mounted signal heads mounted less than 15' vertically? - ANSWERS-2'
Types of lighting luminaires - ANSWERS-incandescent, high intensity gas
discharege (HID)
MUTCD - ANSWERS-Part 4
OSHA - ANSWERS-Safety Date Sheets (SDS) - 16 sections
NEC - ANSWERS-National Electric Code, smaller (house, cabinet)
Types of rigid metallic conduit - ANSWERS-GRG (galvanized rigid conduit), IMC
(intermediate metallic conduit), EMT (electric metal tubing)
Types of rigid non metallic conduit - ANSWERS-PVC (polyvinyl chloride), HPE (high
density polyethylene)
Open conduits should be finished with - ANSWERS-a bushing
Two types of IMSA specified cable jacketing - ANSWERS-IMSA 19-1 spec (PVC
Jacket) and IMSA 20-1 spec (Polyethylene jacket (PE))
IMSA conductor wire sizes - ANSWERS-#10 awg to # 16 awg (#12 and #14ga
typical for traffic signals)
IMSA 7 conductor colors - ANSWERS-black, white red, green, orange, blue, white
w/ black
Rigid signal head mountign - ANSWERS-pipe & nipple, plumbizer (slip fitter),
Astrobrac
, Flexible signal head mounting - ANSWERS-balance hanger
Catenary - ANSWERS-the curved shape a chain or rope assumes once it is hung
and supported from both ends
Messenger cable size - ANSWERS-7 strand cable steel, 5/16" to 9/16" in diameter
Tether cable size - ANSWERS-1/4" to 7/16" in diameter
Signal face mounting height - ANSWERS-min 15' max 25.6'
Horizontal distance must be maintained from the face of curb for side of pole
mounted signal heads mounted less than 15' vertically? - ANSWERS-2'
Types of lighting luminaires - ANSWERS-incandescent, high intensity gas
discharege (HID)
MUTCD - ANSWERS-Part 4
OSHA - ANSWERS-Safety Date Sheets (SDS) - 16 sections
NEC - ANSWERS-National Electric Code, smaller (house, cabinet)
