Es3j | Questions with 100% Verified Answers | Latest Update 2026/2027

Es3j | Questions with 100% Verified Answers | Latest Update
2026/2027
Question: closed circuit television (CCTV)
Answer: What does CCTV stand for?

Question: 6 megahertz
Answer: What is the maximum bandwidth of a standard television channel

Question: NEC article 770
Answer: Which of the following is mandatory code

Question: Ground loop problems
Answer: What causes a sound system to hum or buzz

Question: Poor connection
Answer: Which of the following has the most resistance

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

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

Question: Composite
Answer: A CCTV signal is what type of signal

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

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

Question: Omega symbol
Answer: Know the symbol for ohms

Question: 16 MHz
Answer: Category 3 cable wire is rated at

Question: 100 MHz
Answer: Category 5 cable is rated at

,Question: Mixer
Answer: A microphone is connected to what device

Question: Simultaneously
Answer: Bundled cables are too be pulled

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

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

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

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

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

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

Question: Tree and Branch
Answer: CATV commonly uses the following network configuration

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

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

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

Question: A balance to unbalanced transform
Answer: What is a balun

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

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

, Question: 10 years
Answer: What is considered to be the service life of a smoke detector

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

Question: Bad switch
Answer: 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

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

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

Question: Moving coil
Answer: What type of microphone provides the most transient distortion

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

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

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

Question: Coax
Answer: What is a RG-8V cable.

Question: GFI/GFCI
Answer: 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.

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

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

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

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