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BICSI Installer 1 Questions & Answer,
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25 - pair color code โ: White - Blue, orange, green, brown, slate Red - Blue, orange, green, brown, slate Black - Blue, orange, green, brown, slate Yellow - Blue, orange, green, brown, slate Violet - Blue, orange, green, brown, slate Fiber color code โ: Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua NVP โ: Nominal Velocity of Propagation Insertion loss โ: The difference in the amount of power received before and after something is inserted into the circuit.
Resistance โ: Resistance is expressed in Ohms, and is the property of a conductor to resist the flow of electricity through it. V=IR Inductance โ: Is a property of an electromagnetic field built around a conductor that opposes any change in the current flow in a circuit Capacitance โ: is a property of conductors that allows storage of electric charges when potential differences exist between the conductors. Impedance (V) โ: Total opposition of current flow measured in Ohms American Wire Gauge (AWG) โ: A standard rating that indicates the diameter of a wire, such as the conducting core of a coaxial cable or the twisted pairs in a UTP cable. Megahertz (MHz)
Coaxial cable types โ: Series-6 and Series- 11 Coaxial connectors โ: Series-6 uses BNC and F connectors Series-11 uses F and N connectors Fiber connectors โ: SC, ST, and SST(LC or cladding โ: The glass or plastic shield around the core of a fiber-optic cable. Cladding reflects light back to the core in patterns that vary depending on the transmission mode. This reflection allows fiber to bend around corners without impairing the light-based signal. Multimode Fiber (MMF) โ: Larger core with multiple paths of light. Common for backbone and horizontal cabling in buildings. OM2 - Not recommended for new installs. OM3 - Higher bandwidth. OM4 - Highest bandwidth for MMF. 2000m/6500ft limitation. 850 nm and 1300 nm (nanometers) Singlemode Fiber
โ: Smaller core with only one path of lights. Horizontal, riser, campus environments. 9 um core, 125 um cladding. OS1 - LAN, tight buffered construction, 1310/1550 nm OS2 - Outside Plant, 1310, 1490, 1550, 1625 nm 3000m/9842ft limtations. Ribbon Fiber โ: Multiple 250 um fibers bonded into a flat color coded ribbon. Can splice a bunch at a time. Fiber - Tight buffer diameter โ: 900 um Fiber - Acrylate coating diameter โ: 250 um OM โ: 850 nm OFL - 200 MHzโขkm (3.5dB/km) 1300 nm - 400 MHzโขkm (1.5dB/km) OM
Modal Bandwidth is described in terms of... โ: (MHz)(km) Ferrule Key Latching Mechanism โ: flat or pre-radiused end assures consistent connector orientation within couplers locks in place Straight Tip (ST) โ: One of the most common fiber-optic connectors, similar in style to the BNC connector in coax subscriber connector (SC) โ: A square snap coupling for fiber-optic cable, about 2.5 mm wide, used for cable-to-cable connections or to connect cables to network devices. It latches with a push-pull action similar to audio and video jacks. Small Form Factor (SFF)
โ: LC and MU an example of array connectors... โ: MPO Can terminate 6-72 optical fibers into a single ferrule Ohm's Law โ: V=IR Typical balanced twisted pair cable โ: 100 Ohms UTP 4 pairs blue, orange, green, brown (tip/ring) 8P8C - B pinout โ: White/orange Orange White/green Blue
1 trillion cycles โ: 1 Hz 60 Hz 1 KHz 1 MHz 1 GHz 1 THz Voltage, current, and amperes โ: P(Power)=V(voltage) x I(Current) What is bandwidth expressed in โ: analog frequencies (0Hz to 1MHz) AWG โ: Smaller number - bigger wire Higher number - smaller wire A balanced twisted pair has... โ: a nominal characteristic impedance of 100 Ohms
A unbalanced coaxial cable has... โ: a nominal characteristic impedance of 75 Ohms Category 3 Category 5e Category 6 Category 6A Category 8 โ: 16 MHz 100 MHz 250 MHz 500 MHz 2000 MHz 8P8C - A pinout โ: White/green Green White/Orange Blue
โ: Houses equipment that serves an entire building unlike a TR that serves a single floor TR โ: Telecommunications room - serves one floor TE โ: A TE is a subset of a TR that generally serves a limited space. NOT TO BE USED TO REPLACE A TR Normal rack height and width? โ: 7 feet tall and 19/23 inches wide Conduit fill ratio โ: 40 percent for new installation, not to exceed 60 percent J-hooks โ: Typically used to hold up to 50 cables. Placed every 4-5 feet to support cable Surface Mount Box types โ: Shallow, Standard, and Deep
What are the six elements of professionalism listed in the ITSIMM โ: An installer should _ in public, and _ in private โ: Praise. Correct. Cabling installation companies are dependent on _ for new and repeat business โ: Customers What are the percentages of communication perception? โ: Body language - 55% Tone of voice - 38% Word choice - 7% What are three ways to minimize EMI? โ: Using shielded cable (STP) Using fiber instead of copper Putting the cable in conduit (shielded pathway) 1 sine wave = _
What type of coaxial connector cannot be used with cables that have stranded center conductors? โ: F connectors What type of construction allows the cable jacket to expand and contract with changes in temperature without affecting the fibers? โ: Loose tube What are the two ways of coupling fibers? โ: plug to plug plug to jack Hierarchy of codes, standards, and regulations โ: AHJ Codes and regulations Standards Industry best practices Manufacturer instructions What are the two common depths for telecommunications racks?
โ: 4 inch and 6 inch a _ conduit terminates in a vertical orientation โ: stub-up a _ conduit terminates in a horizontal orientation โ: stub-out How many backbone levels are in a horizontal cabling system? โ: 2 levels What is the minimum number of cables per work area? โ: 2, voice and data What is the maximum length of a patch cord? โ: 16.5 ft What is the maximum length of a horizontal optical fiber cable? โ: 295 ft
What service entrance has the lowest installation cost? โ: aerial What type of ladder should be using near electrical work? โ: non-conductive (i.e. fiberglass) What are the four steps you should take responding to an electrical fire? โ: R - rescue A - alarm C - confine E - extinguish What neutralizes battery acid? โ: baking soda How far should the backboard be installed above the finished floor in a TR โ: 8 inches How much vertical space does one rack unit (RU) occupy?
โ: 1.75 inches A hand bender can be used for conduits up to โ: 1 1/ What is the minimum bend radius for 2 in. conduit โ: 12 in Open top cable supports (j-hooks) should be install to provide a minimum of _ clearance above ceilings โ: 3 inches What are the three main bonding and grounding components? โ: Ground rod PBB TBB What are the recommendations for placing a BBC (GE) in a multistory building? โ: Every third floor and the top
