Spectrum Field Tech QUESTIONS AND ANSWERS COMPLETE

Current/ amperage - Flow or movement of electric charges Resistor - a passive two-terminal material that impedes the flow of current What is the most common workplace hazard involving electricity? - Electrical shocks What is minimum approach distance? - The shortest safe distance to keep from energized conductors CATV at the pole - 40'' CATV at the mid-span - 24'' CATV at the house - 12'' Live parts of electric equipment must be guarded against at how many volts? -50 volts What are the 2 kinds of grounds required by Safety standards for electrical systems? - Service and Equipment What are circuit protection devices designed to do? - Automatically limit or shift off the flow of electricity in the event of a ground fault, overload, or short circuit in the wiring system OSHA - Occupational Safety and Health Administration CATV - Community Antenna TelevisionHFC - Hybrid Fiber Coax What are the four sources of signals? - Satellite, local origination, off air, fiber optics Forward - 54 MHz-1 GHz G.B. - Guard Band Return - 5-42 MHz Downstream (forward path) - Forward signal from the headend to a customer Upstream (reverse path) - Return signal from a customer to the headend Signal frequency - Number of times that an RF signal completes a cycle from a positive value to a negative value and back in one second Ultrasonic frequencies are higher than what? - Audio Infrasonic frequencies are below what? - Audio How many hertz can the human ear hear? - 20-20,000