RCDD Exam Questions with 100% Correct Answers | Verified | Updated 2024, Exams of Communication

Download RCDD Exam Questions with 100% Correct Answers | Verified | Updated 2024 and more Exams Communication in PDF only on Docsity! RCDD Exam Questions with 100% Correct Answers | Verified | Updated 2024 (Chapter 1: Principles of transmission) Synchronous - Correct Answer-is performed by synchronizing the data bits in phase or in UNISON with equally spaced clock signals or pulses. No start stop signals. (Pg. 1-43) (Chapter 1: Principles of transmission) Asynchronous - Correct Answer-Carries start and stop signals and popular with microcomputers. (Pg. 1-43) ( Chapter 1: Principles of transmission) What Multiplexes electrical signals to separate optical wavelengths at the source that are sent along one optical fiber to its receiver at the opposite end. - Correct Answer-Wavelength division multiplexing (WDM) (Chapter 1: Principles of Transmission) What Combines binary data from several different sources into a single COMPOSITE BIT STREAM? - Correct Answer-Time Division Multiplexing (TDM). (Pg. 1-32) pg. 1 professoraxel (Chapter 1: Principles of Transmission) How is frequency measured? - Correct Answer-Hertz (Pg. 1-18) (Chapter 1: Principles of transmission )What are the key factors in determining which optical fiber to use ? - Correct Answer-1. Active Equipment. 2. Distance. 3. Bandwidth. (Pg. 1-94) (Chapter 1: Principles of Transmission) The N.E.X.T loss is dominated by components in the near zone less than ? - Correct Answer-66 Feet (Chapter 1: Principles of Transmission) When cable shields are properly terminated, bonded, and grounded they ? - Correct Answer-1. Reduce the radiated signal from the cable. pg. 2 professoraxel 2. Radiated effects of E.S.D. 3. Contact Discharge. (Pg. 2-21) (Chapter 2: Electromagnetic Compatibility) What are the Methods used to suppress or prevent unwanted signals ? - Correct Answer-1. Filtering. 2. Shielding. 3. Bonding and Grounding of cable shields and equipment. (Pg. 2-20) (Chapter 2: Electromagnetic Compatibility) Electromagnetic spectrum in order of wavelength size, Smallest to Largest. - Correct Answer-Gamma Rays, X rays, ultraviolet, visible light, infrared, microwaves, and radio pg. 5 professoraxel ( Chapter 2: Electromagnetic Compatibility) C.M.R.R for high quality chokes is ? - Correct Answer-40 dB ( Chapter 2: Electromagnetic Compatibility) Branch circuits need no separation if ? - Correct Answer-Less than 5 kVA (Chapter 2: Electromagnetic Compatibility): What is the Definition of E.S.D ? - Correct Answer-A natural phenomenon in which accumulated electric charges are discharged. (2-21) (Chapter 2: Electromagnetic Compatibility): How Does Radiated interferences enter electronic devices? - Correct Answer-1. Proximity to interfering sources. 2. Missing or inadequate gaskets or enclosures. 3. Missing or inadequate bonding or grounding. 4. Missing or inadequate device or shielding. (Pg. 2-3) pg. 6 professoraxel (Chapter 3: Telecommunication Spaces) What is the acceptable humidity level in an Equipment Room ? - Correct Answer-60% (Chapter 3: Telecommunication Spaces) Location of T.R - Correct Answer-Vertically aligned, loadbearing wall, and solely for Telecommunication equipment. (Pg. 3-12) (Chapter 3: Telecommunication Spaces) Liquid Carrying pipes - Correct Answer-Shall not be routed through, above, or in the walls encompassing telecommunication spaces. (Chapter 3: Telecommunication Spaces) Same floor T.R Sleeve count and size ? - Correct Answer-1 trade size 3 or 78 millimeter conduit (Pg. 3-6) (Chapter 3: Telecommunication Spaces) T.R Minimum height ? - Correct Answer-8 feet Minimum but B.I.C.S.I recommends 10 Feet (Pg.3-4) (Chapter 3: Telecommunication Spaces) T.R Sleeves Recommended minimum amount? - Correct Answer-4 (Pg. 3- 6) pg. 7 professoraxel (Chapter 4: Backbone Distribution Systems) What Happens with poor vertical wire management ? - Correct Answer-1. Slippage between the cable core and the sheath. 2. Stretching of copper conductors. 3. Broken Cables. (Pg. 4-33) (Chapter 4: Backbone Distribution Systems) Multimode Fibers that can go 984 Feet at 10 gigabytes in a Building Subsystem ? - Correct Answer-OM3, OM4, and Single mode (Chapter 5: Horizontal Distribution Systems) Balanced Twisted Pair cabling in MUTOAs and Consolidation Points allowable distance from H.C or F.D ? - Correct Answer-50 Feet (Chapter 5: Horizontal Distribution Systems) What is an O.L.T optical line terminal? - Correct Answer-A switch found at the headend that sends signal to O.N.Us and O.N.Ts. (Pg. 5-45 and 5-46) pg. 10 professoraxel (Chapter 5: Horizontal Distribution Systems) Test Question with Drawing: Distance of wire from splice to work area outlet ? - Correct Answer-This is a Permanent Link equaling 295 feet (Chapter 5: Horizontal Distribution Systems) What is an O.N.T ? - Correct Answer-Looks like a switch but for fiber, can be racked mounted (8, 16, and 24 port options) or you can find them as four port DESKTOP devices. (Chapter 5: Horizontal Distribution Systems) Pull Through Method Rules for fiber distribution - Correct Answer-for small buildings of 1 or 2 stories with a limited amount of users. Maximum Recommended fiber optical length is 1000 ft. (Chapter 5: Horizontal Distribution Systems) Consolidation Point should be limited to serving a maximum of - Correct Answer-12 work areas (Chapter 5: Horizontal Distribution Systems) Wave Division Multiplexing (WDM) Definition ? - Correct Answer-Multiplexes optical carrier signals onto a single optical fiber strand by using different wavelengths of laser light. Used by PONs via Single Mode fiber. pg. 11 professoraxel (Chapter 5: Horizontal Distribution Systems) When should Bridge Taps be used ? - Correct Answer-Only on analog systems and they must be avoided at all cost especially on pigtail transmission. (Pg. 5-17) (Chapter 5: Horizontal Distribution Systems) What Fiber Device is used at the work area? - Correct Answer-O.N.T (Chapter 5: Horizontal Distribution Systems) Max Conduit Fill - Correct Answer-40% (Pg. 5-62) (Chapter 6 : ITS Cables and Connecting Hardware) Types of data patch panels ? - Correct Answer-12, 16, 24, 32, and 48 (Pg. 6-63) (Chapter 6 : ITS Cables and Connecting Hardware) Types of CoAX patch panels ? - Correct Answer-12, 24, 48, and 96 ports (Pg. 6-113) (Chapter 6 : ITS Cables and Connecting Hardware) Balanced Twisted pair sizes used ? - Correct Answer-Not recommended 26 through 22 American wire gauge (Pg. 6-8) pg. 12 professoraxel (Chapter 6: ITS Cables and Connecting Hardware) Minimum Balanced Twisted Pair size for a 66 punch down block ? - Correct Answer-Minimum is Category 3 Class C and Maximum is Category 5e Class D. (Pg. 6-67) (Chapter 7: Firestop Systems) Nonmechanical Firestop systems ? - Correct Answer-1. Endothermic 2. Ablative 3. intumescent (Chapter 7: Firestop Systems) : Name the 3 qualified electrical apparatuses ? - Correct Answer-1. Boxes 2. Junction Boxes 3. Fixtures (Pg. 7-9) pg. 15 professoraxel (Chapter 7: Firestop Systems) Poke Thru classification ratings ? - Correct Answer-2 Hour, 3 hour, and 4 hour. (Chapter 7: Firestop Systems) What are the 3 Mechanical Firestop systems ? - Correct Answer-1. Cable transit Systems. 2. Fire Rated Pathway devices. 3. Factory-Fabricated sleeve systems. (Pg. 7-20) (Chapter 8: Bonding and Grounding) Directly buried cables collect ground strikes at what distance ? - Correct Answer-19.7 feet (Chapter 8: Bonding and Grounding) What happens to the impedance of the T.B.B due to length ? - Correct Answer-The impedance increases pg. 16 professoraxel (Chapter 8: Bonding and Grounding) Minimum size of a bonding conductor is ? - Correct Answer-6 A.W.G (Chapter 8: Bonding and Grounding) Who is responsible for the grounding and lighting protection of their entrance facility ? - Correct Answer-Public utility companies (Chapter 8: Bonding and Grounding) The T.G.B equalizes the potentials during ? - Correct Answer-1. Lightning. 2. electrostatic discharge. 3. E.M.I conditions. (Chapter 8: Bonding and Grounding) How long should a ground rod electrode be ? - Correct Answer-8 feet long (Chapter 8: Bonding and Grounding) What is used to equalize potentials between TRs on multiple floors with an ultimate connection to the T.M.G.B located in the E.F ? - Correct Answer-T.B.B pg. 17 professoraxel 3. Lock and tagout the energy source. 4. Prove that the energy source is effectively isolated. (Chapter 9: Power Distribution) The optimum temperature for a battery is ? - Correct Answer-77 degrees Fahrenheit (Chapter 9: Power Distribution) Magnetic Field Coupling pertains to ? - Correct Answer-Inductive Reactance XL (Chapter 9: Power Distribution) the most common three phase services are ? - Correct Answer-208y 120v, 240v, or 480y 227v (Chapter 9: Power Distribution) Electric Field coupling pertains to ? - Correct Answer-Capacitive reactance XC (Chapter 9: Power Distribution) Working spaces and clearances from live parts and shall not be less than ? - Correct Answer-1 meter pg. 20 professoraxel (Chapter 10: Telecommunications Administration) Label distance from termination ? - Correct Answer-12 inches (Chapter 10: Telecommunications Administration) What is the Labeling Configuration for Telecommunications Equipment ? - Correct Answer-Row, Rack, Shelf, Slot, Port (Chapter 10: Telecommunications Administration) G.E.C Label location when it wraps around the room and goes to another floor? - Correct Answer-At intervals and both ends (Chapter 10: Telecommunications Administration) What is the Label Configuration for a T.G.B or Telecommunications Grounding Busbar ? - Correct Answer-Room, Device and Rack, Row, Rack In Line (I.E 2B-TGB/R201.4) (Chapter 11: Field Testing of structured cabling) What is the primary wiring used for Distributed Antenna Systems ? - Correct Answer-50 ohm air dielectric coaxial cable (Pg. 11-18) (Chapter 11: Field Testing of structured cabling) What is the measurement of the signal coupling between any two pairs pg. 21 professoraxel along the entire length of the cable. - Correct Answer-NEXT (NEAR END CROSS TALK) (Chapter 11: Field Testing of structured cabling) What test determines if the individual conductors in the cabling are connected correctly ? - Correct Answer-Wire map (Pg. 3) (Chapter 11: Field Testing of structured cabling) What is a measure of the worst case difference in magnitude between the expected insertion loss and the actual measured insertion loss. - Correct Answer-Insertion loss deviation (Chapter 11: Field Testing of structured cabling) What test determines the conductor resistance with the far end of the conductors being shorted ? - Correct Answer-DC Loop resistance (Pg. 4) (Chapter 11: Field Testing of structured cabling) What is a measurement of the reflection of a signal power from the insertion of a device in a transmission line in d.B . - Correct Answer-Return Loss pg. 22 professoraxel (Chapter 12: Outside Plant) Is O.S.P subject to fill ratio ? - Correct Answer-No (Chapter 12: Outside Plant) What is the most common medium for connections to access provider ? - Correct Answer-Balanced Twisted Pair ( Pg. 12-5) (Chapter 12: Outside Plant) Who installs and has ownership of the conduits installed to the property line, easement, or outside edge ? - Correct Answer-The owner of the building owns the conduit and should supply two or more conduits. (Pg. 12-6) (Chapter 12: Outside Plant) How many 90 degree bends are allowed between pull boxes ? - Correct Answer-No more than 2 (Pg. 12-7) (Chapter 12: Outside Plant) O.S.P Conduit burial requirements ? - Correct Answer-1. 24 inches deep. 2. Tape 12 inches deep based on 50 year frost line. pg. 25 professoraxel (Chapter 13: Audio Visual Systems) Per manufacturer how much signal does a 2 way splitter lose ? - Correct Answer-3.5 dB (Chapter 13: Audio Visual Systems) True or False Per chapter 13 audiovisual systems states infrared is below visible light on the electromagnetic spectrum ? - Correct Answer-True Infrared is below visible light on the spectrum. (Chapter 14 : Building automation Systems) Traditional B.A.S use copper B.T.P conductors ranging from ? - Correct Answer- 16 gauge to 22 gauge (Chapter 14 : Building automation Systems) When are B.A.S products and technologies typically upgraded ? - Correct Answer-every 5 through 7 years (Pg. 14-3) (Chapter 14 : Building automation Systems) How much may lighting account for in a commercial building ? - Correct Answer-40 % (Pg. 14-13) pg. 26 professoraxel (Chapter 14 : Building automation Systems) The Minimum type of four pair cable for B.A.S systems should be ? - Correct Answer-Cat 5.e Class D (Chapter 15: Data Networks) W.A.N design options are ? - Correct Answer-1. Centralized. 2. Partial Mesh 3. Full Mesh (Chapter 14: Building Automation System) What provides a dead band when neither heating or cooling energy is used? - Correct Answer-Zero Band (Chapter 15: Data Networks) When multiple servers are linked together its called ? - Correct Answer-Server clustering (Pg. 15- 10) (Chapter 15: Data Networks) What Layer does VLAN function on ? - Correct Answer-Layer 2 Data link (Chapter 15: Data Networks) A M.A.N can connect two sites in a city while a W.A.N can ? - Correct Answer-two or more sites in different countries (Pg. 15-3) pg. 27 professoraxel (Chapter 17: Electronic Safety and Security) What are the 3 Camera Types ? - Correct Answer-1. IR Cameras. 2. Thermal Cameras. 3. Film Cameras. Outdoor Camera Heights are 15' A.F.F (Chapter 17: Electronic Safety and Security) Name the 4 lock types ? - Correct Answer-1. Bored. 2. Rim 3. Mortise 4. Vertical (Chapter 17: Electronic Safety and Security) What are the basic components of an E.A.C ? - Correct Answer-1. A computer. pg. 30 professoraxel 2. 1 or more control panels. 3. 1 or more peripheral devices connected to the control panel. (Chapter 17: Electronic Safety and Security) E.S.S primary functions ? - Correct Answer-1. Access Control 2. Surveillance 3. Intrusion Detection 4. Fire Alarm and detection (Chapter 17: Electronic Safety and Security) 3 types of Electric strike monitoring switches ? - Correct Answer-1. Latch Bolt 2. Locking Cam 3. Dead Bolt pg. 31 professoraxel (Chapter 17: Electronic Safety and Security) What are the 3 elements of an E.S.S ? - Correct Answer-1. Electronic 2. Architectural 3. Operational (Chapter 17: Electronic Safety and Security) Video Surveillance Matrix inputs and outputs ? - Correct Answer-8 or 16 (Chapter 17: Electronic Safety and Security) What are 3 Video Surveillance Matrix Benefits ? - Correct Answer-1. Flexibility 2. Scalability 3. Reliability (Chapter 17: Electronic Safety and Security) What are the 3 common components in an alarm system ? - Correct Answer- 1. Sensors pg. 32 professoraxel ( Chapter 18: Data Centers) What is the Industry standard for Data center best practices ? - Correct Answer-ANSI BICSI 002- 2011 ( Chapter 18: Data Centers) Minimum Data center industry STANDARD ? - Correct Answer-ANSI T.I.A 942 A ( Chapter 18: Data Centers) Route Copper cables in underfloor pathways in the ? - Correct Answer-Hot Aisle ( Chapter 18: Data Centers) What is M.T.B.F ? - Correct Answer-Mean Time Between Failure ( Chapter 18: Data Centers) M.P.O stands for ? - Correct Answer-Multipath Optical ( Chapter 18: Data Centers) In a Data Center the service provider terminates at the ? - Correct Answer-External Network Interface or E.N.I ( Chapter 18: Data Centers) What is the popular Cable route method for central office ? - Correct Answer-Overhead pg. 35 professoraxel ( Chapter 18: Data Centers) 40 gig over O.M.3 requires ? - Correct Answer-8 Fibers per channel ( Chapter 18: Data Centers) According to BICSI how many security divisions or domains are there ? - Correct Answer-10 ( Chapter 18: Data Centers) 100 gig over O.M.4 requires ? - Correct Answer-20 Fibers per channel ( Chapter 18: Data Centers) What does E.P.O stand for ? - Correct Answer-Emergency Power off ( Chapter 18: Data Centers) BICSI minimum for Data Center Fiber type ? - Correct Answer-O.M.3 ( Chapter 18: Data Centers) What are the Types of Data Center Telecommunication spaces ? - Correct Answer-1. E.F 2. Z.D.A 3. E.D.A pg. 36 professoraxel 4. M.D.A 5. I.D.A 6. H.D.A ( Chapter 18: Data Centers) Data Center Cabinet ventilation percentage ? - Correct Answer-63% ( Chapter 18: Data Centers) Data Center proper planning for cross and vertical cable management ? - Correct Answer-40% (Chapter 19: Health Care): What is a T.E.C in Health Care ? - Correct Answer-A Hospital Shall have at least one Technology Equipment Center exclusively for Data storage, Processing, and networking. Must be at least 12 feet from any E.M.I. at 64 to 75 degrees with 30 to 55 percent humidity. (Chapter 19: Health Care): What Ties access control , video, and infant protection . - Correct Answer-I.E.S.S pg. 37 professoraxel ( Chapter 20: Residential Cabling) Topology for Optical Fiber ? - Correct Answer-Star and Ring ( Chapter 20: Residential Cabling) Primary Connector configuration for B.T.P for residential ? - Correct Answer- T.5.6.8.A ( Chapter 20: Residential Cabling) Point of Demarcation for service provider is the ? - Correct Answer-N.I.D outside ( Chapter 20: Residential Cabling) For Residential electronic testing is known as ? - Correct Answer-Qualification Test ( Chapter 20: Residential Cabling) What test is performed by using network equipment ? - Correct Answer-Qualification Test ( Chapter 20: Residential Cabling) What is the Basic Visual Test for wiring ? - Correct Answer-Acceptance Test ( Chapter 20: Residential Cabling) What Test is performed before and after drywall and uses wire mapping along with continuity ? - Correct Answer-Verification Test pg. 40 professoraxel ( Chapter 20: Residential Cabling) What Test meets all industry standards ? - Correct Answer-Certification Test ( Chapter 20: Residential Cabling) What wire is used for the A.D.O ? - Correct Answer-Either a Minimum of 4 strand fiber, Category 5, or Series 6 Coax, from N.I.D to A.D.O jack in the D.D. ( Chapter 20: Residential Cabling) In residential applications power should be within ? - Correct Answer-5 feet ( Chapter 20: Residential Cabling) B.T.P termination connections shall use ? - Correct Answer-I.D.C connections ( Chapter 20: Residential Cabling) The D.P is evidenced by the ? - Correct Answer-N.I.D (Pg. 20-5) ( Chapter 20: Residential Cabling) Labels must be ? - Correct Answer-Mechanically Printed pg. 41 professoraxel (Chapter 21: Business Development and Project Management) Lesson Learned Meeting Definition ? - Correct Answer-A meeting at the end of each project to discuss what went wrong and well. (Chapter 21: Project Management) What should a project manager or I.T.S designer do before a project ? - Correct Answer-Build a plan. (Pg. 21-6) (Chapter 21: Business Development and Project Management) Earned Value is a ? - Correct Answer-Cost Tracking Method Tag and grounding rule for conduit less than 5 feet ? - Correct Answer-? Temperature and Humidity changes in equipment room to stay within? - Correct Answer-1%? Lightning Travels how far in meters ? - Correct Answer-2 through 6 meters pg. 42 professoraxel