IMSA Traffic Signal Inspector Chapter 1 – Introduction QUESTIONS FULLY SOLVED

Ampacity - CORRECT ANSWER The maximum current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. Bonded (Bonding) - CORRECT ANSWER Connected to establish electrical continuity and conductivity. Bonding Jumper, Main - CORRECT ANSWER The connection between the grounded circuit conductor and the equipment grounding conductor at the service. Disconnecting Means - CORRECT ANSWER A device (or group) by which the conductors of a circuit can be disconnected from their source. Effective Ground-Fault Current Path - CORRECT ANSWER Intentionally constructed, low-impedance path intended to carry current under ground-fault conditions from the point of s ground-fault in the system to the electrical supply source that facilitates the operation of the overcurrent device(s) of ground fault detectors on high-impedance grounded systems. Equipment - CORRECT ANSWER General term: fittings, devices, appliances, luminaries, apparatus, machinery, ect. in connection with an electrical installation. Equipment Grounding Conductor (EGC) - CORRECT ANSWER The conductive path(s) installed to connect normally non-current carrying metal parts of equipment together and to the system grounded conductor to the grounding electrode conductor, or both. Grounded (grounding) - CORRECT ANSWER Connected to a ground or a conductive body that extends to the ground connection. Grounded Conductor - CORRECT ANSWER What is commonly referred to as the "neutral wire" the NEC calls this the --------- conductor. Usually white in color. Grounding Conductor - CORRECT ANSWER What is usually referred to as the "ground wire", the NEC and CEC call the --------- conductor. This wire is usually green or bare. Grounding Electrode - CORRECT ANSWER A conducting object through which a direct connection with Earth is established. Hand hole enclosure - CORRECT ANSWER An enclosure for use in underground systems, with an open or closed bottom, allowing workers to reach into, but not enter for the purpose of access to wiring systems. Location, Damp - CORRECT ANSWER Locations protected from weather and not subject to saturation with water or moisture, but subject to moderate degrees of moisture. Location, Dry - CORRECT ANSWER Location not normally subject to wetness. May be temporarily subjected, but not usually. Location, Wet - CORRECT ANSWER Installations underground or in concrete slabs, or masonry in direct contact with earth in locations subject to saturation with water or other liquids. Service - CORRECT ANSWER The conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served. Service Point - CORRECT ANSWER Point of connection between the service and the premises / customer Ungrounded Conductor - CORRECT ANSWER The "hot wire(s)" NEC calls the --------. they can be many colors, but never white or green. NEC/CEC conventions are not followed when.... - CORRECT ANSWER Conductor insulation coding may use green for a poser wire in traffic signal applications, which is conflict with these conventions. ATSSA - CORRECT ANSWER American Traffic Safety Services Association Usual duration of temporary traffic signals - CORRECT ANSWER 30 days or less, unless part of a larger project. Key provisions in MUTCD for temporary traffic signals - CORRECT ANSWER 1. Advance signing 2. Meet physical requirements of permanent signal 3. Removed when finished 4. heads covered when not in use. Dose not detail how. Impact attenuators - CORRECT ANSWER Used to absorb a colliding vehicle's kenetic energy. Requires a minimum buffer distance and truck mass.