ES3J Study Questions & Correct Answers

Rectifier - ANSWERSWhat part of power supply converts electrical current from AC to DC Grounded loop - ANSWERSTearing or flagging of a video picture is the direct result of Frequency multiplexing - ANSWERSYou have a frequency that has been amplified to four frequencies the change is called 19-23" wide - ANSWERSWhich of the following is true of an equipment rack? In series with the heating contacts - ANSWERSThe heat anticipator on the load of a line voltage thermostat is connected ______? 75 - ANSWERSThe standard impedence of a standard video coax cable is ____ OHMS? Boost transformer - ANSWERSHow do you increase the voltage through a circuit after it passes through? Reflective light - ANSWERSHow would you get the best picture on a monitor? Green with a yellow stripe - ANSWERSWhat is the color of an equipment grounding wire? 900 OHM - ANSWERSWhat is the minimum resistance error of a 1000 OHM resistor with an error of 10%? Fiber Optic - ANSWERSThe best product for a closed circuit system is with more than 7000 without reamplification is? The F speed stop of the lens - ANSWERSWhat is a cameras sensitivity based on? Balancing Transformer - ANSWERSHow do you get rid of snow on a monitor? Ceiling grid - ANSWERSWhen mounting an interior camera which of the following is not a suitable location? Fiber Optic Cable - ANSWERSGiven: Hardwire alarm system control panel should be installed so that they help reduce magnetic downtime and false alarms, electromagnetic interference must be prevented from entering the system control panel and causing interference. Which of the following eliminates EMI? Short Circuit - ANSWERSWhich of the following should not cause a swinger? Radiated Energy - ANSWERSWhen white and black bars appear on a video monitor, this condition is known as hum, what causes this condition? Voltage - ANSWERSWhich of the following factors would not affect the temperature of conductors under a full load? Star, bus, hierrachal ARE ALL multipoint - ANSWERSWhat type of network is not considered multipoint? Voltmeter - ANSWERSWhat device is best used to test a dry cell? Shorted - ANSWERSA length of COAX cable used for data is terminated at one end with 50 OHM terminator, the resistance between the shield and the center conductor at the other end of the cable is 0 OHMS; this indicated the cable continuity is _____? Bell Current Stays - ANSWERSAll of the following are advantages to using a relay to remote actuate a signaling device except? 44 - ANSWERSGiven: 4 Speakers wired in seried of 4 OHMS, 8 OHMS, 16 OHMS, and 16 OHMS, what is the total impedence? Black - ANSWERSThe power wire for AC is designated by what color? 75 OHMS - ANSWERSThe standard impedance of the terminator cable is Latching Relay (this is the answer) Exit Delay Deranged Delay - ANSWERSAll of the following are the same except ADD ground straps - ANSWERSAll of the following are means to repair objectionable current in metal raceways except: Latching Relay - ANSWERSWhat keeps the alarm circuit activated and the output device operating even if the protective circuit is restored to normal? 3 Point connection - ANSWERSOffice telecommunication cables are routed into designated local cable rooms that function as remote cable distribution points for room connections, this strategy is called a _____? Short circuits - ANSWERSan OHM meter reading of 0 OHMS indicates which of the following? Knots and Kinks easily - ANSWERSWhat is a major disadvantage to using copper clad steel cable for an antenna? Electric pressure - ANSWERSA voltmeter is used to measure? Safe electrical installations - ANSWERSThe purpose of the NEC is to provide _____? Volts - ANSWERSElectrical pressure or electric motor force is measured in _____? AC - ANSWERSand Alternator produces_____? Wiring the shunt lock directly to the alarm panel - ANSWERSWhat procedure helps defeat tampering with a shunt lock on older systems? Drop Latch - ANSWERSWhen a signal is detected, power is applied to the system triggering the annunciator and when power is no longer applied the annunciator continues because of what relay type? Bill trap detector - ANSWERSAll of the following are space detectors except Latch the coil to keep the circuit in alarm condition - ANSWERSWhat is the main function of the drop relay in a closed circuit security alarm system? Audio - ANSWERSWhich of these detectors uses a microphone? Megahertz - ANSWERSA television signal is measured in which of the following? Time division multiplex - ANSWERSWhich one of these switching systems places many interval telephone conversations onto one telephone line? Band - ANSWERSWhat is another name for frequency? is Shorted - ANSWERSA current that leaves its intended path and returns to the source bypassing the load causes the circuit to be ______?