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Exam (elaborations)

ES3J 2026/2027 | Study Guide, Practice Questions & Answers | Exam Prep

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ES3J 2026/2027 | Study Guide, Practice Questions & Answers | Exam Prep

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Es3j

Equalization Any intentional alteration of frequency response including tone control is
termed


A frequency dividing network A crossover is confined to a band of frequencies for which a component is
responsible. This is accompanied by


Composite A CCTV signal is what type of signal


Attenuation caused by the electronic devices within the Single mode fiber cable does not experience modal dispersion and is not
system limited by bandwidth rather it is limited by


Fusion splicing Fiber cable splicing which consist of aligning two clean fibers end to end and
joining them with an electric arc, is called


Omega symbol Know the symbol for ohms


16 MHz Category 3 cable wire is rated at




100 MHz Category 5 cable is rated at


Mixer A microphone is connected to what device


Simultaneously Bundled cables are too be pulled


Star Network A collection of links with a common node is an example of a


Bus Network Multiple computers sharing a common line is an example of a


Ring Network A network in which each computer is connected to two other computers
forming a circle is called


Network A system in which all communication devices go back to a central switching
point is called


Alternating Current (AC) An electrical current that movement reverses at regularly recurring intervals is
known as


Button activated and typically silent What are the characteristics of a hold up alarm




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,Es3j



Tree and Branch CATV commonly uses the following network configuration


Remove the water in the soil Which of the following would provide the least effective ground


Sat in On a satellite receiver what sends the polarized voltage back to the LNB


12 Volts In a 12 volt system what voltage should be read across a closed switch when
there is a 6k Ohm EOL resistor


A balance to unbalanced transform What is a balun


A double beam requires more installation What is the advantage of a single ended beam detector vs. a double ended
beam detector


Air turbulence causes false alarms What is the disadvantage to having an outdoor intrusion detector


10 years What is considered to be the service life of a smoke detector


Follow manufactures instructions What is the proper method for testing a smoke alarm in a two family dwelling




Bad switch A 12 volt circuit with a 21 ohm resistor is being tested with the switch closed. The
reading shows 1.2 volts. What is the problem


Add a bonding jumper A coax cable that is designed for 60 volts is reading 63 volts. How can the
situation be remedied


Condenser or ribbon microphone What type of microphone provides the least amount of transient distortion


Moving coil What type of microphone provides the most transient distortion


Test for resistance How would someone check a coax cable to make sure it's good


24 AWG Most telephone cable is comprised of solid _________ gauge copper wire


Fixed coil and a movable iron vane What are the components of a magnetic vane meter


Coax What is a RG-8V cable.


GFI/GFCI Which of the following is not considered suitable to be plugged into a security
alarm transformer. What do you not want to hook a security system up to.




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15 mins On a voice EVAC system what duration of time should the system be tested
under secondary power


dB is 100th of a bell is false. It is 1/10th of a bell All of the following are true except


Run directly on the ceiling grid Communication cables are being run above a drop ceiling. All of the following
methods are acceptable for installation of the cable except


19-23" wide Which of the following is true of an equipment rack


250 MHz Category 6 cable is rated up to _______ MHz


Gain A combined increase in signal strength of intensity and voltage is known as


Bus Network A network in which a computer is connected to two other computers is called


Composite What is an analog video signal that contains all of the components necessary
to construct a monochrome and color picture


Two parallel conductors separated by a small distance Which of the following best describes a twin lead antenna wire
using the insulator


Other voltage sources must be disconnected What must be done first when testing an EOL protective loop with an
ohmmeter


UF What type of wire is to be used for common direct burial


Accessible Cable is being installed in an area that is above a suspended ceiling that
contains completely enclosed air ducts. What term or word identifies this
location


Wooden plugs According to the NEC, electrical equipment may NOT be mounted on
concrete, cinder block, or brick walls with


3 1/2 feet What is the minimum required height for a proprietary manual pull fire alarm


Grounding connection What is the function of a green wire in a manufactured home


50 feet Heat detectors used within a family unit must be listed or approved for not less
than


NFPA 72 What is the National Fire Protection Association code publication that refers to
household fire fighting equipment


Drawings that show the interconnection of tandem The supplier or contractor that installs house fire warning is required to provide
connected detectors the building owner with all the following materials EXCEPT



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