Pregunta 1
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Testing should be performed using an organized systematic method. Which of the following is Phase 1 method
Pregunta 2
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Testing should be performed using an organized systematic method. Which of the following is Phase 2 method
Pregunta 3
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Testing should be performed using an organized systematic method. Which of the following is Phase 3 method
Pregunta 4
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Troubleshooting a problem in a customers cabling system involves, Check all that apply
Respuesta
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Verify and isolate the problem
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repair and retest to ensure functionality
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alienate or confuse person being questioned
Pregunta 5
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Troubleshooting is an __________________ process
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tedious
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investigative
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technical
Pregunta 6
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These types of test equipment are used for which of the following, (wire map, multimeter, TDR, butt set, inductive amplifier,...
Respuesta
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optical fiber media
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copper media
Pregunta 7
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Certification test sets are used to verify that a cabling system meets transmission performance requirements.
These link parameters are defined in which applicable standards. Check all that apply
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ANSI/TIA 1152
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ISO/IEC 11801
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NEC/NFPA
Pregunta 8
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What is the frequency range for Category 6a
Pregunta 9
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Nominal velocity of propagation ( NVP) is used to determine
Respuesta
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length
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delay skew
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wire map
Pregunta 10
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This coefficient is used to determine the speed of transmission along a cable relative to the speed of light in a vacuum, typically expressed as a percentage.
Pregunta 11
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Factory calibration may be required every 18 months for certification test sets.
Pregunta 12
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A good rule of thumb is to perform the field calibration at least_________ or ______________ a new series of tests. (Check all that apply)
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once a day
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before beginning
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monthly
Pregunta 13
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An *PASS or *FAIL is often referred to as the _________ _________ or a __________ ___________ . Check all that apply
Respuesta
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uncertainty zone
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marginal condition
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reference dimension
Pregunta 14
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Pairs within a 4 pair cable use a different twist length to improve NEXT. A physical difference in length between pairs is referred to as
Respuesta
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velocity of propagation
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delay skew
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return loss
Pregunta 15
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When addressing copper media, __________________ is the loss in power as it travels along a cable, increases with temperature, frequency and cable length as well as improper terminations and equipment cords.
Pregunta 16
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___________ is the unwanted signal coupling between pairs, It is measured at the end of a cable nearest the point of transmission.
Pregunta 17
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__________________ is a ratio of the outgoing signal to the power of the reflected signal expressed in dB.
Respuesta
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Attenuation
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delay skew
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return loss
Pregunta 18
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Because of the twisting of the pairs, the actual physical length of balanced twisted pair cable will appear slightly shorter than the electrically measured length.
Pregunta 19
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Prior to Optical fiber installation, the installer and the client should determine what field tests should be performed to include these as a minimum.
Check all that apply
Respuesta
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polarity
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attenuation
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length
Pregunta 20
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Pre-installation testing should start with a check that the fiber type is correct. testing can be done with a visual fault locator(VFL), optical loss test set (OLTS), and an optical time domain reflectometer (OTDR). Of these three, which can be used using only one end
Pregunta 21
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Acceptance testing is accomplished by using which of the folowing
Pregunta 22
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This tool is used to inspect the end face of the optical fiber connector for radius of curvature, offset of polish and optical height.
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Microscope
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Interferometer
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VFL
Pregunta 23
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Microscopes greater than 200x power, tend to make the smallest defect look much worse than it actually is.
Pregunta 24
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For bi-directional testing at both wavelengths at one time the test instrument to be used is
Pregunta 25
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A current certificate of calibration of the tester may be required as part of the projects documentaion requirements.
Pregunta 26
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All values of attenuation for cable, connectors, and splices provided in any standard or specification are stated as being the maximum allowed loss values accepted by the standard.
Pregunta 27
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Connector insertion loss is often stated in cabling components standards as _______ dB per mated pair for both multimode and singlemode, but all products should be better than _______ per mated pair.
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3.5, 1.5
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0.75, 0.5
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0.5, 0.3
Pregunta 28
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The splice insertion loss allowance for LAN cabling standards is 0.3 dB per splice regardless if it is mechanical or fusion, single mode or multi mode.
Pregunta 29
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Bandwidth for optical fiber circuits cannot be measured in the field or proven through calculations by installer.
Pregunta 30
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The _______ jumper method is the preferred referencing method for most installed optical fiber systems.
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two, formerly Method A
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one, formerly Method B
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three, formerly Method C
Pregunta 31
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This tester locates and detects faults and determines the amount of signal loss at any point in the optical fiber.
Pregunta 32
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The OTDR trace ___________ replace the need for the OLTS testing.
Pregunta 33
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This tester uses Rayleigh scattering and Fresnel reflection to measure characteristics of an optical fiber.
Pregunta 34
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_______________ wavelengths of light exhibit greater amounts of attenuation in the same optical fiber because of their higher sensitivity to Rayleigh scattering.
Pregunta 35
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_____________ wavelengths are more sensitive to bending loss.