Entry Exam Flashcards by Andrew George

Which statement regarding NEXT is true?

Crosstalk is greatest at the near end (at the sender end)

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What type of hard hat is recommended for Construction work?

Class E, Type 2

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According to the TIA-569-D standard, what is the maximum length of conduit allowed between pull points in a horizontal cable system?

30 meters/100 feet

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What must be done in order to operate a fusion splicer below 0 degrees?

Warm the splicing area

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When testing cable, what does an asterisk (*) beside the NEXT value indicate?

The NEXT value is marginal

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What size is the PBB (TMGB)?

0.25” x 4” x variable length

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When viewed from the front of the patch panel, how are the WA cables routed on a two row 48-port hinged patch panel, that hinges towards the left?

All 48 cables are routed to the left side of the patch panel

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What is the minimum diameter sheave (pulley) that is required for a 900 pair cable, 2.75” in diameter, if the bend radius for a multipair in 10 x OD?

55 inches

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According to ANSI-568.0-D standard, what is the maximum installation pull/tensile load for a 4-pair cable?

25 lbf.

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According to the TIA-569-D standard, what is the maximum number of 90º bends that may be placed between pull points of a horizontal conduit system?

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Which of the jack pin/pair assignments is backward compatible with 2-pair USOC configuration?

T568A

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Which firestopping material should be used to seal a round opening in a concrete wall?

Intumescent foam

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A 100BASE-TX switch uses two 25-pair cables to connect to a patch panel. What is the minimum number of patch panel jacks needed to terminate the two cables?

12 for each cable

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If a patch panel is 4 Us high, how much space in inches will it take up on the rack?

7 inches

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What size of mechanical splice devices are required to splice a loose tube cable to a breakout cable?

250 µm - 900 µm

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What is the minimum number of BBC’s (a.k.a., ground equalizer [GE]) required in a ten story building with two TRs per floor?

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Which type of network topology require a central device?

Star topology

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According to ANSI-568-C.2 standard, which of the following is a required certification field-test parameter?

Return Loss

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Which firestopping material should not be used to seal a round opening in a concrete wall?

Self leveling caulk

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A hybrid optical fiber loose-tube cable, with 6 strands per tube, has 24 SM strands in the first series of tubes. What are the colours of the strand and the tube of the MM fiber strand 18?

Red tube, white strand

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An analog CCTV system is to be converted to digital. What infrastructure equipment is required to allow the use of some existing analog cameras?

A PoE Ethernet switch connected to a PoE powered video encoder

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A bundle of cables in a TR are not labelled. What tool is used to identify the cables?

Toner/wand

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When viewed from the front of the patch panel, how are the WA cables routed on a two row 48-port hinged patch panel, that hinges towards the left?

All 48 cables are routed to the left side of the patch panel

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What is the nominal impedance of RG-58 (Series-58) cable?

50 Ω

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A hybrid optical fiber loose-tube cable, with 6 strands per tube, has 24 SM strands in the first series of tubes. What are the colours of the strand and the tube of MM strand 24?

Black tube, white strand

What is done after fusing two fibers together?

Install splice protector

What instrument is required to measure the length of a coaxial cable?

Time domain reflectometer

What equipment is needed to find a defective fiber connector?

Visual fault locator

What is insertion loss?

Insertion loss is the same as attenuation

What is the allowable ampacity for a 24 awg, 75 ºC, 8 conductor Class 2 power and Data circuit, when using only 4 conductors and bundled with 1 other cable?

1.96 A

Which wire map test cannot be done with a basic continuity-type tester?

Split pairs

According to the ANSI-568.3-D standard, what is the identifying colour of a single mode optical fiber SC connectors?

Blue

When certifying a Cat. 6A direct attached link, or a.k.a., modular plug termination link (MPTL). How is the certifying equipment configured?

A link adapter at one end and a patch cord adapter at the other end

What equipment is needed to find an active fiber strand?

Fiber identifier

How many sheets of plywood are required in a TR located on an 80,000 ft² floor space, where the ratio of floor area to plywood is 75:1?

34 sheets

A 600-pair OSP feeder cable is terminated in a branch splice enclosure to two 300-pair OSP distribution cables. What is the minimum number of 25-pair straight connector modules for this enclosure?

24 modules

According to the TIA-569-D standard, what is the maximum allowable distance between non-continuous cable supports such as "J" hooks?

5 ft

Which one of the TIA standards would you refer to for information about the grounding and bonding requirements for telecommunications?

TIA-607

What is tested with a tier 2 optical fiber test?

Attenuation of cable elements

A fiber link indicates a loss of 10 dBm. How much light power is being received at the receiver?

100 µW

According to the TIA-569-D standard, what is the maximum length of conduit allowed between pull points in a horizontal cable system?

30 meters

When pulling a multi-pair cable, what is done to eliminate twisting?

Pull cable with a swivel

What is the colour sequence for a modular plug configured for T568B?

W-Orange, Orange-W, W-Green, Blue-W, W-Blue, Green-W, W-Brown, Brown-W

How much shorter will the maximum permanent link length be when using 28 AWG 'small conductor" cords with a derating factor of 92%?

82.8 meters 90 meters X 92% = 82.8 meters

What type of backbone cabling configuration scheme is outlined in the TIA-568.0-D standard?

Star

What must be done in order to operate a fusion splicer below 0 degrees?

Warm the splicing area

According to the ANSI-568.0-D standard, what is the minimum bend radius for a 4-pair UTP?

4 times diameter

What will happen to channel attenuation when a 62.5 µm fiber patch cord is connected to a 50 µm fiber?

Attenuation will be higher when the source is connected to the 62.5 µm fiber

Which property of firestopping material causes it to absorb heat?

Endothermic

Which combination of UTP performance characteristics requires that "length" is part of the specifications (e.g. 28.7 ohms/1000 ft.)?

DC resistance, insertion loss, and capacitance

What is measured when testing fiber loss?

A difference ratio in power

When testing cable, what does a pass with an asterisk (*) indicate?

The test result is closer to the test limit than the measurement accuracy of the tester, but the cable does achieve an overall pass.

What is the logical sequence of tests to find faults on an active fiber channel?

Check link lights, fiber continuity, power meter & light source, OTDR

Which is correct definition of a split pair?

A split pair is a transposition of two conductors of separate pairs

Which type of network topology uses a terminator?

Bus topology

How must a ground bus be installed?

Mounted on insulators, spaced 2" from the mounting surface

Which of the following represents the abbreviation "Gb/s" ?

Gigabit per second

an OSP cable connecting two buildings has the following colours identifying the last pair. Black superbinder Violet-brown binders Violet-slate pair What is the minimum number of 250-pair terminal blocks and the minimum number of 25-pair connector blocks required to terminate both ends of this cable?

16 terminal blocks and 144 connector blocks

hich of the following cable pulling lubricants provide the lowest pulling tension?

Silicone based

Installed on a CEA-310-E compliant 19" rack is the following equipment: 3(three) - Horizontal cable management panels, 19" x 1-3/4" 2(two) - Switch, 19" x 5-1/4" 2(two) - Modular pacth panels, 19" x 3-1/2" How many rack units does all this equipment occupy?

13 rack units

A 1900 m link of singlemode outdoor fiber operating at 1310 nm has 2 mechanical splices and 2 mated connectors. The component losses are as follows: Fiber loss = 0.5 dB/km Splice loss = 0.3 dB Mated pair connector loss = 0.75 dB What is the total loss of this link?

3.05 dB

Which cable type has the equivalent fire rating of FT6?

CMP

According to the TIA-568-B.3 standard, what is the attenuation specification for one optical fiber splice?

0.30 dB

What is the relationship between wavelength and frequency?

Frequency is inversely proportional to wavelength

What are two popular sizes of rack mounting screws?

10-32 and 12-24

What equipment is required to bend a 4" rigid conduit?

Hydraulic pipe bender

According to the ANSI-568.3-D standard, what is the identifying colour of a 62.5/125 µm mulimode optical fiber SC connector?

Beige

According to the TIA-568-B.3 standard, what is the attenuation specification for one mated optical fiber connector pair?

0.75 dB

What section in the CEC would you find the rules for Conductors for a Class 2 power and Data Circuits?

Section 16

What equipment is needed to find the length of optical fiber on a reel?

OTDR

What is the maximum amount of cable jacket that may be removed when terminating Category 6 cable?

Only as much as necessary to terminate

Which verification test result would result in an inaccurate, if the NVP was not set correctly?

Length

Which connector uses IDC termination technology?

110 connector

How is a direct attached link, a.k.a., modular plug termination link (MPTL) terminated?

A jack in the field and a plug at the HC

What instrument is required to measure return loss per connection in an optical fiber link?

An optical TDR measurement unit

What type of splice method is used if future rearrangement and maintenance is needed?

Foldback splice

What value of dB represents a doubling of power?

3 dB

A 850 m link of multimode fiber operating at 850 nm has 1 mechanical splice and 2 mated pair connectors. The component losses are as follows: Fiber loss - 3.5 dB/km Splice loss - 0.3 dB Mated pair connector loss - 0.75 dB

4.78 dB

What size is the PBB (TMGB)?

0.25" x 4" x variable length

When testing cable, what does an asterisk (*) beside the NEXT value indicate?

The NEXT value is marginal

Which statement is correct regarding jack/plug configuration as per ANSI-568.0-D standard?

T568B is optional and T568A is standard

What equipment is needed to find the length of copper cable on a reel?

Time domain reflectometer

According to the TIA-568.0-D standard, what is the maximum amount of conductor untwist for a Cat.3 cable?

3 inches

Which property of firestopping material causes it to develop a hard char when heated?

Ablative

According to the ANSI-568.3-D standard, what is the identifying colour of a laser optimized optical fiber SC connector?

Aqua

According to the ANSI-568.3-D standard, what is the identifying colour of a APC optical fiber SC connector?

Green

How is the position of fiber number 1 identified on an MPO connector?

The number one fiber is identified with a paint mark

How is an outdoor wireless access point (WAP) connected in a location where there are no nearby AC power outlets?

Connect the WAP to a non PoE capable switch using a midspan device

What is the minimum diameter sheave (pulley) that is required for a 900 pair cable, 2.75" in diameter, if the bend radius for a multipair in 10 x OD?

55 inches

Given the distances of cabling need for the workstations below. How many boxes of cable are required to cable this floor section with 2 cables per workstation, including an allowance of 10% on each end?

When plugging an MPO cord into active equipment (transceivers), what is the gender of the connector?

The cord connector needs to be female

What size is the SBB (TGB)?

0.25" x 2" x variable length

A PoE powered WAP is relocated beyond the reach of UTP cabling. What is needed to extend the reach?

Connect the WAP with UTP to a PoE powered UTP/fiber media converter

Which property of firestopping material causes it to expand when heated?

Intumescent

During the inspection of the fiber with a microscope, which one of the following finishes, though not perfect, may still be acceptable?

Minor scratches in cladding

According to ANSI/TIA-568.3-D, which statement is correct regarding Tier 2 optical fiber testing?

Tier 2 testing is done after Tier 1 testing

Which non-mechanical firestopping material should be used to temporarily seal an opening in a building?

Pre-manufactured pillows

According to the TIA-569-D standard, what is the minimum vertical clearance required between a ladder rack in a ceiling and the ceiling tiles?

3 inches

What splice method should be used on multipair cables, where the splices need to be maintained?

Fold back splice

What are the sequences of steps used to troubleshoot a MM fiber connected to an active Ethernet hub?

Clean fiber connectors and check link lights

When testing NEXT, what does "worst case margin" indicate?

The point (frequency) where NEXT test result is closest to the test limit

An EF is located 20 meters from the exterior edge of a building. How many meters of non-FT rated outdoor fiber cable be installed into the EF?

In 17 meters of rigid conduit

How is a "Type-B' MPO cable configured?

The fiber from position 1 goes to position 12 at the other end

How is a "Type-A' MPO cable configured?

The fiber from position 1 goes to position 1 at the other end

In a patch cord, what is the alternate colour of pair #1?

Green-Red

According to the ANSI-568.3-D standard, how is a MM SC connector differentiated from a SM SC connector?

The MM connector is colour-coded beige and the SM connector is colour-coded blue

Entry Exam Flashcards

(106 cards)