Spectrum Field Tech Exam Questions & Answers 100% Correc

Current/ amperage - ANSWER-Flow or movement of electric charges Resistor - ANSWER-a passive two-terminal material that impedes the flow of current What is the most common workplace hazard involving electricity? - ANSWER-Electrical shocks What is minimum approach distance? - ANSWER-The shortest safe distance to keep from energized conductors CATV at the pole - ANSWER-40'' CATV at the mid-span - ANSWER-24'' CATV at the house - ANSWER-12'' Live parts of electric equipment must be guarded against at how many volts? - ANSWER-50 volts What are the 2 kinds of grounds required by Safety standards for electrical systems? - ANSWER-Service and Equipment What are circuit protection devices designed to do? - ANSWER-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 - ANSWER-Occupational Safety and Health Administration CATV - ANSWER-Community Antenna Television HFC - ANSWER-Hybrid Fiber Coax What are the four sources of signals? - ANSWER-Satellite, local origination, off air, fiber optics Forward - ANSWER-54 MHz-1 GHz G.B. - ANSWER-Guard Band Return - ANSWER-5-42 MHz Downstream (forward path) - ANSWER-Forward signal from the headend to a customer Upstream (reverse path) - ANSWER-Return signal from a customer to the headend Signal frequency - ANSWER-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? - ANSWER-Audio Infrasonic frequencies are below what? - ANSWER-Audio How many hertz can the human ear hear? - ANSWER-20-20,000 Per NTSC requirements, what is a tv channels bandwidth? - ANSWER-6MHz FCC (Federal Communications Commission) - ANSWER-Gov agency responsible or regulating and assigning frequencies throughout the US HFC distributes what? - ANSWER-Broadband signals through a network of various elements