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C ----✔✔If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is: A. 3 dB B. 20 dB C. 30 dB D. 40 dB E. 1000 dB B ----✔✔The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of a receiver. The noise level at the input to the receiver is 1 microwatt. What is the signal-to- noise ratio (SNR) (dB) at the receiver input? A. 10 dB B. 30 dB C. 40 dB D. 60 dB E. 100 dB C ----✔✔A SONET OC-1 channel can carry 672 voice signals and has a data rate of 51.84 Mbps. ASONET OC-48 channel can carry 32,256 voice channels. What MINIMUM data rate is required for the OC- 48 channel? A. 155 Mbps B. 622 Mbps C. 2.5 Gbps D. 5 Gbps E. 10 Gbps
A ----✔✔All of the following are nominal wavelengths for laser light sources EXCEPT: A. 700 nm B. 850 nm C. 1300 nm D. 1310 nm E. 1550 nm A ----✔✔A video camera has a coaxial cable output. The video signal is to be distributed to devices that have balanced twisted pair inputs. The transition between these two different transmission media can be accomplished by using a: A. Balun B. Converter C. Modulator D. Cross connect E. Transceiver C ----✔✔The public telephone system is an example of a __________ system. A. Simplex B. Half-duplex C. Full-duplex D. Purely analog E. Purely digital D ----✔✔Wave division multiplexing (WDM) is most similar to: A. Amplitude modulation B. Frequency modulation C. Time division multiplexing D. Frequency division multiplexing E. Carrier sense multiple access with collision detection (CSMA/CD)
D. Easy to produce E. Easily embedded into other materials D ----✔✔Which is an advantage of stranded conductors over solid conductors? A. Less costly B. Simpler terminations C. Better high frequency performance D. More flexible E ----✔✔The conversion of an analog speech signal to a pulse code modulation (PCM) digital signal involves all of the following steps EXCEPT: A. Low pass filtering B. Periodic sampling C. Quantizing D. Companding E. Amplitude modulation B ----✔✔Assume that the optical power transmitted by a 62.5/125 multimode fiber is distributed uniformly across its core. If this fiber is perfectly coupled (i.e., the two fibers are aligned and abutted) to a 50/125 fiber, what is the percent of power that is lost? A. 0 percent B. 36 percent C. 50 percent D. 80 percent E. 100 percent A ----✔✔Which of the following correctly lists the lowest frequency band to the highest frequency band? A. MF, HF, VHF, UHF B. UHF, VHF, HF, MF C. HF, MF, UHF, VHF
D. VHF, UHF, MF, HF
E. HF, MF, UHF, VHF
B ----✔✔Time division multiplexing (TDM) systems are designed to transport ________ between end point systems. A. Only analog signals B. Only digital signals C. A mix of both analog and digital signals D. Both analog and digital signals, but only one type at a time C ----✔✔A reasonable approximation for the signal speed in 100 ohm balanced twisted pair cable is__________, where c is the velocity of light in free space. A. 0.2 c B. 0.4 c C. 0.6 c D. 08 c E. 0.9 c C ----✔✔Which characteristic is an advantage of copper based media over optical fiber cable? A. Weight B. Corrosion resistance C. Ability to handle analog signals D. Susceptibility to EMI E. Very high data rates A ----✔✔Which electrical characteristic is displayed with the correct preferred value? A. Dielectric constant - high value B. Dielectric strength - high value C. Dissipation factor - low value
C. 203 mm (8 in) D. 324 mm (12.75 in) E. 483 mm (19 in) B ----✔✔You are required by architectural design to place UTP cables in the same space as unshielded power lines. How should you proceed with the placement of your cables? A. Require the architect/electrical engineer to place shielding in the space before your UTP is placed. B. You should provide a minimum separation of 610 mm (24 in). C. You should provide a minimum separation of 229 mm (9 in). D. You should provide a minimum of two 101 mm (4 in) RMC. C ----✔✔Which of the following is NOT a form of signal coupling between two (2) circuits? A. Conductive B. Inductive C. Reactive D. Capacitive E. Electromagnetic A ----✔✔A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n): A. Unbalanced circuit B. Grounded circuit C. Poorly timed signal D. Improper dielectric material D ----✔✔The electromagnetic spectrum of visible light lies in the ___________ frequency range of the spectrum. A. 1 GHz B. 100 GHz C. 10 THz
D. 1 PHz E. 100 PHz A ----✔✔The potential for ______ occurs when devices or systems share a common electromagnetic environment and their operational frequencies overlap. A. Electromagnetic interference (EMI) B. (EMC) C. Radio frequency interference (RFI) D. Fast transients E. Electrostatic discharge (ESD) B ----✔✔Which of the following is an undesirable electromagnetic effect on a device(s)? A. (EMC) B. Electromagnetic interference (EMI) C. Radio frequency interference (RFI) D. Fast transients E. Electrostatic discharge (ESD) A ----✔✔During a site survey you notice that several CRT displays in the vicinity of the engineering copy center have sporadic visual distortion. What is the MOST likely cause? A. Electromagnetic interference (EMI) B. Radio frequency interference (RFI) C. (EMC) D. Fast transients E. Electromagnetic discharge (ESD) C ----✔✔The ability of a device to withstand electromagnetic disturbances from another device is: A. Electromagnetic interference (EMI) B. Radio Frequency Interference (RFI)
C. 0.3 dB D. 0.5 dB E. 1.0 dB C ----✔✔What is the International Organization for Standardization/International ElectrotechnicalCommission ISO/IEC class rating for American National StandardsInstitute/Telecommunication Industry Association (ANSI/TIA) Category 5e cable? A. Class B B. Class C C. Class D D. Class E E. Class F A ----✔✔There are three buildings approximately 400 meters apart and the customer wants to use10 Gig Ethernet. What fiber should be specified for this application? A. 8 - 9 micron singlemode B. 50 micron multimode C. 50 micron laser optimized multimode D. 62.5 micron multimode B ----✔✔Which of the following is true about screened twisted pair cable assemblies? A. The drain wire and screen foil must be bonded at one end only. B. The drain wire and screen foil must be bonded at every connection. C. There is no need to bond the screen foil or drain because it is not important. D. The drain wire and screen foil must be separately bonded at opposite ends. B ----✔✔Which of the following is NOT a design consideration for broadband video distribution? A. Amplifier link budgets B. Adhering to the 90 meter (295 feet) rule for horizontal distribution C. Amplifier cascade limitations
D. Environmental factors E. Drop length A ----✔✔You are extending 1000 MHz video service from your existing headend to a new equipment room (ER). Your existing incoming video signal is plus (+) 15 dBmV. You have three two- way splitters with a total of minus (-) 15 dB. You are adding 122 m (400 ft) of series 11 (RG11) cable with a minus (-) 18 dB with eight single end F-connectors with a total of minus (-)1.2 dB. From the selections below, what is the MINIMUM gain amplifier required in the headend room? A. Plus (+) 15 dB B. Plus (+) 20 dB C. Plus (+) 25 dB D. Plus (+) 30 dB E. Plus (+) 35 dB A ----✔✔What is the connector of choice for Series 59, Series 6, and Series 11 applications? A. F-Style B. Bayonet Neill-Conncelman (BNC-Style) C. N-Style D. SMA E. Ultra high frequency (UHF) B ----✔✔You must extend a video systems backbone coax cable that was recently installed. Which of the following coaxial cable types would provide the best performance for both analog and digital video? A. Series 6 B. Series 11 C. RG 16 D. RG 59 E. RG 62 C ----✔✔The RJ-45 is now known as the 8P8C style connector, per the TelecommunicationsIndustry Association (TIA) standard. What does the P and C stand for?
C. Screened twisted-pair (ScTP) D. Coaxial D ----✔✔What is the frequency rating of an International Organization forStandardization/International Electrotechnical Commission (ISO/IEC) Category 7/Class F cable? A. 100 MHz B. 250 MHz C. 500 MHz D. 600 MHz E. 1000 MHz C ----✔✔A furniture cluster with 26 requires a MINIMUM of how many multiuser telecommunications outlet assembly (MUTOA)? A. 1 B. 2 C. 3 D. 4 E. 5 A ----✔✔Which of the following is NOT an example of a perimeter pathway? A. Furniture pathways B. Surface raceways C. Multi channel raceways D. Under carpet cabling E. Raceways integrated within walls A ----✔✔On a project with three small conference rooms, a break room, and twelve private offices, what is the MINIMUM number of telecommunications outlet boxes required? A. 16 B. 24
C. 28
D. 40
E. 46
D ----✔✔Which of the following is NOT a type of connector for optical fiber? A. LC B. ST C. SFF D. S/FTP E. SC A ----✔✔When specifying telecommunications outlet boxes, all of the following should be consideredEXCEPT: A. Outlet box shall be a minimum of 100 mm (4 in) x 100 mm (4 in) x 76 mm (3 in) B. Outlet boxes should be installed near an electric outlet at the same height C. Different outlet boxes have different support requirements D. Floor mounted telecom outlet boxes should be coordinated with furniture to minimize the potential trip hazard E. Outlet boxes must be of adequate size so that minimum cable bend radius requirements are not exceeded B ----✔✔Assuming the total fill capacity of a pathway is 100 cables (all of the same cable type and size), the MAXIMUM number of cables to be installed during the initial installation, without exceeding the fill ratio is: A. 25 B. 40 C. 50 D. 60
C ----✔✔The MINIMUM separation distance between grounded metal telecommunications pathway and unshielded power lines is: A. 75 mm (3 in) B. 150 mm (6 in) C. 300 mm (12 in) D. 610 mm (24 in) E. 1220 mm (48 in) D ----✔✔A telecommunications outlet/connector may be provided using all listed below EXCEPT: A. Wireless AP connectivity B. Balanced twisted-pair outlets C. Optical fiber connectors D. 4p4c (4 position, 4 contact) connector B ----✔✔An open office design is made up of three furniture clusters and contains a total of nine.How many multiuser telecommunications outlet assemblies (MUTOA) should be in the design? A. 1 B. 3 C. 4 D. 6 E. 9 B ----✔✔The standard floor space coverage area for each building automation system (BAS), is aBAS outlet or device for every_______ of floor space. A. 9.3 m 2 (100 ft 2) B. 23 m 2 (250 ft 2) C. 31 m 2 (330 ft 2) D. 56 m 2 (600 ft 2) E. 84 m 2 (904 ft 2)
B ----✔✔The standard floor space coverage area for each building automation system (BAS) is aBAS outlet or device for every ________ of floor space. A. 9.3 sq m (100 sq ft) B. 23 sq m (250 sq ft) C. 31 sq m (330 sq ft) D. 56 sq m (600 sq ft) E. 84 sq m (904 sq ft) C ----✔✔Cables are installed in a ceiling in a straight line. The ceiling run is 60 m (200 ft) in length.What is the MINIMUM number of J-hooks required to support the cables? A. 20 B. 30 C. 40 D. 50 E. 60 B ----✔✔You are designing a horizontal distribution system that will have a zone box located 71.6 m( ft) away from the telecommunications room (TR). A 50 mm (2 in) conduit is designed from the TR to a pull box located 36.6 m (120 ft) away from the TR. A 1 1/2 inch conduit is designed from the pull box to the zone box located 35.1 m (115 ft) beyond the pull box.Assuming no conduit bends, and excluding the TR and zone box, what is the total number of pull boxes/pull points required in this horizontal conduit system between the telecommunications room (TR) and zone box? A. 2 B. 3 C. 4 D. 5 C ----✔✔The MINIMUM finished height of access flooring in a general office area is: A. 50 mm (2 in) B. 150 mm (6 in) C. 200 mm (8 in)
D. 4
E. 5
C ----✔✔Which of the following is true when describing slip sleeves or gutters? A. More costly than pull boxes B. Can be used as a splice location C. Provides more space for pulling D. Cannot be used in place of a pull box E. Must be equal in size to the main conduit A ----✔✔Which of the following is NOT an advantage of access floor systems? A. They have a low initial cost B. They are designed for high capacity C. They are aesthetically acceptable for office decor D. Cabling is easily accessible across the entire floor E. Changes can be made quickly with little occupant disruption C ----✔✔An existing ceiling raceway system has 115,000 sq mm (177 sq in) of cross-sectional area available for distribution of cable runs. How many can be served by the existing system? A. 115 B. 160 C. 177 D. 189 E. 195 C ----✔✔You are designing a horizontal pathway system where you will provide 100 mm (4 in) conduit and pull boxes. The building architectural elements will only allow for a single layer of conduits (not stacked). The main horizontal pathway system consists of five 100 mm (4 in) conduits. Large single sheath copper cables are not expected to be placed. Which of the following is the MINIMUM width pull box that is to be provided?
A. 600 mm (24 in) B. 900 mm (36 in) C. 1220 mm (48 in) D. 1520 mm (60 in) E. 1830 mm (72 in) D ----✔✔Which type of cable tray is best described as a ventilated bottom with side rails? A. Ventilated channel B. Ladder C. Spline D. Ventilated trough E. Basket tray D ----✔✔Which of the following is NOT considered acceptable in an information technology system(ITS) conduit design and installation? A. Contains no continuous sections longer than 30 m (100 ft) B. Bonded to ground on one or both ends in accordance with national or local code requirements C. Will withstand the environment to which they were exposed D. Uses flexible conduit to access wall outlets E. Avoid routing conduit over or adjacent to heat sources D ----✔✔A conduit run is installed from the ER to a TR. It has two (2) 90 degree bend and a length of 20 m (65 ft). What will be the MINIMUM test rating of the pull cord left in the conduit? A. 20 kg (44 lb) B. 40 kg (88 lb) C. 60 kg (132 lb) D. 90 kg (200 lb) E. 100 kg (220 lb)
