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BICSI Installer 2 Copper practice questions

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Question 1Pathway and space preparation

Under no-load installed conditions, the minimum bend radius for a 4-pair balanced twisted-pair cable is generally stated as:

  1. Four times the cable outside diameter Correct answer.
  2. Ten times the cable outside diameter
  3. Two times the cable outside diameter
  4. One times the cable outside diameter

Explanation

Balanced twisted-pair standards and cable manufacturer instructions specify a minimum bend radius of four times the cable outside diameter for cable that is installed and under no tensile load. Bending tighter than that deforms the pair geometry and degrades return loss and crosstalk.

Question 2Pathway and space preparation

Horizontal 4-pair cables supported from building structure with J-hooks should be supported at intervals not exceeding:

  1. 1.5 m (5 ft) Correct answer.
  2. 3 m (10 ft)
  3. 2.4 m (8 ft)
  4. 300 mm (12 in)

Explanation

Horizontal balanced twisted-pair cable is supported at intervals not exceeding 1.5 m (5 ft) so that it does not sag, kink, or carry its own weight as tension at the support points.

Question 3Pathway and space preparation

What is the primary purpose of installing innerduct in a large telecommunications conduit?

  1. To subdivide the raceway into separate channels for current and future cables Correct answer.
  2. To provide the required electrical separation from nearby power conductors
  3. To electrically bond the outer conduit to the building grounding system
  4. To increase the total usable cross-sectional area available inside the raceway

Explanation

Innerduct divides a large raceway into smaller channels, letting cable be segregated by system and added later without disturbing cable already installed in the conduit.

Question 4Pathway and space preparation

After cables have been installed through a sleeve in a fire-rated wall, what must be done to the annular space?

  1. It must be sealed with a listed firestop system intended for those penetrants Correct answer.
  2. It must be capped with a metal plate attached to the wall on the occupied side
  3. It must be filled with expanding polyurethane foam to hold the cables in place
  4. It must be left open so the sleeve can be inspected during future cable additions

Explanation

A rated wall performs only as tested when its penetrations are closed with a firestop system listed for the exact cables, sleeve, and wall construction involved. Sealing the annular space restores the fire-resistance rating that the opening removed.

Question 5Pathway and space preparation

EMT used as a telecommunications pathway must be securely fastened at intervals not exceeding ___ and within ___ of each box or termination.

  1. 1.5 m (5 ft); 900 mm (3 ft)
  2. 3 m (10 ft); 900 mm (3 ft) Correct answer.
  3. 1.5 m (5 ft); 300 mm (1 ft)
  4. 3 m (10 ft); 600 mm (2 ft)

Explanation

NEC 358.30 requires EMT to be fastened in place at intervals not exceeding 3 m (10 ft) and within 900 mm (3 ft) of boxes, conduit bodies, cabinets, and other terminations.

Question 6Pathway and space preparation

In a suspended ceiling space, horizontal telecommunications cables should be:

  1. Laid across the ceiling tile as long as they are not compressed
  2. Supported independently of the ceiling grid and ceiling tiles Correct answer.
  3. Resting on the grid with tile retaining clips every 3 m (10 ft)
  4. Tied to the ceiling grid hanger wires at every second tile

Explanation

Ceiling tile and grid are not structural supports for cable. Cable must be supported from the building structure or a dedicated pathway with listed hardware so the ceiling system is not loaded and tiles stay removable.

Question 7Pathway and space preparation

Cable installed in a ceiling space that is used to handle environmental air must be:

  1. Riser rated and installed in metal conduit at all times
  2. Limited-use rated and supported every 1.2 m (4 ft)
  3. Plenum rated unless it is enclosed in a metal raceway Correct answer.
  4. General purpose rated with a fire-resistive outer jacket

Explanation

In an environmental air-handling space, exposed cable must be listed for plenum use (CMP) because of its low smoke and heat-release characteristics. Cable without that listing is permitted only where it is enclosed in metal raceway or another permitted enclosure.

Question 8Pathway and space preparation

For a raceway that runs straight through a pull box, the minimum length of the box in the direction of the pull is:

  1. Eight times the trade size of the largest raceway entering the box Correct answer.
  2. Four times the trade size of the largest raceway entering the box
  3. Twelve times the trade size of the largest raceway entering the box
  4. Six times the trade size of the largest raceway entering the box

Explanation

NEC 314.28(A)(1) sizes a straight-pull box at eight times the trade size of the largest raceway. The extra length lets conductors be pulled without being dragged across the box edge.

Question 9Pathway and space preparation

What is the maximum total bend permitted in a raceway between pull points?

  1. 270 degrees
  2. 540 degrees
  3. 180 degrees
  4. 360 degrees Correct answer.

Explanation

NEC 358.26 limits the sum of bends between pull points to 360 degrees. Beyond that, pulling tension rises and the cable can be damaged, so an additional pull point is required.

Question 10Pathway and space preparation

After rigid metal conduit has been cut and threaded, the end that will receive cable should be:

  1. Left as cut so the threads grip the cable jacket and limit movement
  2. Coated with anti-seize compound over the threaded end
  3. Flared outward with a swaging tool to widen the opening
  4. Fitted with a listed bushing to protect the cable jacket from sharp edges Correct answer.

Explanation

Cutting and threading leaves sharp burrs that can shave a cable jacket during a pull. Reaming the cut end and fitting a listed bushing provides a smooth, rounded bearing surface where the cable enters the raceway.

Question 11Pathway and space preparation

Where a run of PVC conduit is exposed to wide temperature swings between two fixed points, the run must include:

  1. A bonding jumper installed across each coupling in the run
  2. An expansion fitting sized for the expected movement Correct answer.
  3. A rigid metal section installed to absorb the movement
  4. An oversized pull box installed at the midpoint of the run

Explanation

PVC expands and contracts far more than metal with temperature change. NEC 352.44 requires expansion fittings wherever the raceway is exposed to temperature changes that would produce movement between fixed points.

Question 12Pathway and space preparation

Metal cable tray used as a telecommunications pathway must be:

  1. Painted on all mating surfaces to reduce contact corrosion
  2. Supported only from the structural steel it passes nearby
  3. Electrically continuous and bonded to building ground Correct answer.
  4. Isolated from building steel to prevent circulating currents

Explanation

Metallic cable tray is a conductive pathway and must be electrically continuous across sections and bonded to the building grounding system, as required by NEC 392.60, so fault current has a low-impedance path to ground.

Question 13Pathway and space preparation

New horizontal conduit pathways for telecommunications cable should be installed with a minimum trade size of:

  1. 3/4 in (21 mm)
  2. 1/2 in (16 mm)
  3. 1 in (27 mm) Correct answer.
  4. 2 in (53 mm)

Explanation

Industry guidance calls for a minimum trade size of 1 in (27 mm) for new horizontal telecommunications pathways, which keeps cable fill within limits and preserves capacity for additional cable in the future.

Question 14Pathway and space preparation

Unless they are separated by a permanent barrier, communications cables must be kept at least ___ from conductors of electric light and power circuits.

  1. 150 mm (6 in)
  2. 300 mm (12 in)
  3. 50 mm (2 in) Correct answer.
  4. 25 mm (1 in)

Explanation

NEC 800.133(A)(2) requires a minimum 50 mm (2 in) separation between communications wires and cables and electric light, power, Class 1, and similar circuits, unless a permanent barrier separates them.

Question 15Pathway and space preparation

Which statement about pull points in a raceway run is correct?

  1. They may be concealed if the box is clearly marked on the as-built drawings.
  2. They must remain permanently accessible for inspection and cable work. Correct answer.
  3. They may be concealed if the box is filled with a listed firestop material.
  4. They may be concealed only when the box is welded closed.

Explanation

NEC 314.29 requires boxes and conduit bodies to be accessible without removing building finish. They must be reachable for inspection, for future cable installation, and for repair of the raceway system.

Question 16Pathway and space preparation

Equipment room backboards used to mount telecommunications hardware are typically constructed of:

  1. 19 mm (3/4 in) A-C plywood at least 2.4 m (8 ft) high Correct answer.
  2. 13 mm (1/2 in) particle board finished with a latex sealer
  3. 25 mm (1 in) oriented strand board painted flat white
  4. 16 mm (5/8 in) drywall fastened to metal studs

Explanation

Guidance for telecommunications spaces specifies 19 mm (3/4 in) A-C grade plywood backboards at least 2.4 m (8 ft) high, giving a solid surface to which distribution hardware and cable slack can be securely fastened.

Question 17Pathway and space preparation

When selecting horizontal bends and fittings for a cable tray run, the inside radius of the fitting should be:

  1. At least one-half of the cable's minimum bend radius
  2. At least equal to the cable's minimum bend radius Correct answer.
  3. Independent of the cable type being installed
  4. No larger than the cable's minimum bend radius

Explanation

A pathway must never force the cable tighter than its own minimum bend radius, so tray elbows and horizontal bends are chosen with a radius equal to or greater than the cable manufacturer's stated minimum.

Question 18Pathway and space preparation

When bundling horizontal cables in a pathway, the preferred method to avoid degrading performance is to:

  1. Use metal twist ties that can be tightened as the bundle compresses
  2. Use adhesive tape wrapped around the bundle every 300 mm (12 in)
  3. Use plastic cable ties cinched tight so the bundle cannot shift
  4. Use hook-and-loop fasteners snugged only enough for support Correct answer.

Explanation

Over-tightened fasteners compress the cable, distort the pair geometry, and can change impedance and crosstalk. Hook-and-loop fasteners support the bundle without crushing the jacket or deforming the pairs.

Question 19Pathway and space preparation

A 3 in raceway and a 2 in raceway enter the same side of a pull box and the conductors turn 90 degrees. The minimum distance from the 3 in raceway entry to the opposite wall of the box is:

  1. 24 in
  2. 18 in
  3. 26 in
  4. 20 in Correct answer.

Explanation

NEC 314.28(A)(2) sizes an angle pull as six times the trade size of the largest raceway plus the sum of the trade sizes of the other raceways in the same row. Here 6 x 3 in + 2 in = 20 in.

Question 20Pathway and space preparation

The telecommunications bonding backbone (TBB) shall be no smaller than:

  1. 12 AWG copper
  2. 10 AWG copper
  3. 14 AWG copper
  4. 6 AWG copper Correct answer.

Explanation

TIA-607 specifies a minimum 6 AWG (13 mm2) copper conductor for the telecommunications bonding backbone. The large size keeps impedance low so fault and surge current is diverted away from the cable plant.

Question 21Pathway and space preparation

A listed firestop system installed in a two-hour rated floor/ceiling assembly must have:

  1. An F rating of at least 2 hours and a T rating of not more than 1 hour Correct answer.
  2. An F rating of at least 1 hour and a T rating of not more than 2 hours
  3. An F rating of 2 hours only, because the T rating does not apply to floors
  4. An F rating and a T rating that both equal or exceed 2 hours

Explanation

The F rating states how long the seal resists flame passage and must equal or exceed the rating of the assembly penetrated. The T rating limits temperature rise on the unexposed side and is not required to exceed one hour.

Question 22Pathway and space preparation

Which raceway type is permitted in an environmental air-handling space without any additional special listing?

  1. Electrical metallic tubing Correct answer.
  2. Schedule 40 PVC conduit
  3. Schedule 80 PVC conduit
  4. Liquidtight flexible nonmetallic conduit

Explanation

NEC 300.22(C) limits environmental air-handling spaces to metal raceways, metal cable trays, and other listed low-smoke assemblies. Nonmetallic raceways may be used there only where they are specifically listed for that space.

Question 23Pathway and space preparation

A raceway has an internal cross-sectional area of 0.864 in2. Each cable to be installed has a cross-sectional area of 0.049 in2. Using the standard fill limit for three or more cables, the maximum number of complete cables that may be installed is:

  1. Seventeen
  2. Five
  3. Nine
  4. Seven Correct answer.

Explanation

Where three or more cables share a raceway, the allowable fill is 40 percent of the raceway internal area. Here 0.864 in2 x 0.40 = 0.346 in2, and 0.346 divided by 0.049 gives 7.05, so seven complete cables fit.

Question 24Copper cable handling and installation

What is the generally accepted maximum pulling tension for a single 4-pair balanced twisted-pair copper cable?

  1. 500 lbf (2225 N)
  2. 250 lbf (1112 N)
  3. 100 lbf (445 N)
  4. 25 lbf (110 N) Correct answer.

Explanation

Industry practice limits a single 4-pair cable to roughly 25 lbf (110 N) of pulling tension; larger multipair cables use higher limits set by the manufacturer. Exceeding the limit stretches conductors and permanently changes pair geometry, which can degrade return loss and crosstalk.

Question 25Copper cable handling and installation

When terminating Category 6 cable, what is the maximum untwisted conductor length permitted at the termination point?

  1. 1 in (25 mm)
  2. 3 in (75 mm)
  3. 2 in (50 mm)
  4. 0.5 in (13 mm) Correct answer.

Explanation

The cabling standard allows no more than 13 mm (0.5 in) of untwisted conductor per pair at the termination. The twist controls impedance and limits crosstalk, so excess untwisting degrades link performance even when a basic test passes.

Question 26Copper cable handling and installation

What must be done with accessible copper cables that have been abandoned in a pathway and are not identified for future use?

  1. They must be bonded to the TMGB
  2. They may remain if tagged as out of service
  3. They may remain if both ends are capped
  4. They must be removed Correct answer.

Explanation

Accessible abandoned communications cable must be removed; the only exception is cable that is tagged and identified for future use. Leaving dead cable in a pathway wastes capacity and creates confusion during moves, adds, and changes.

Question 27Copper cable handling and installation

Which method is preferred for securing a bundle of Category 6 cables in a pathway?

  1. Metal staples across the jacket
  2. Adhesive tape every 12 in (300 mm)
  3. Plastic zip ties tightened with pliers
  4. Hook-and-loop straps Correct answer.

Explanation

Hook-and-loop straps can be snugged to hold the bundle without deforming the jacket or changing pair geometry. Plastic ties, staples, and tape are easily over-tightened, crush the cable, or leave residue.

Question 28Copper cable handling and installation

During installation, a kink is formed in a Category 6 cable. What is the correct action?

  1. Remove and replace the kinked cable Correct answer.
  2. Straighten the kink and continue the pull
  3. Test the link and keep it if it passes
  4. Wrap the kink tightly with tape

Explanation

A kink permanently deforms the jacket and pair geometry and changes impedance and crosstalk; the damage cannot be reversed. The affected cable must be replaced rather than dressed or taped.

Question 29Copper cable handling and installation

Where a copper cable run must cross a power circuit, how should the crossing be made?

  1. In contact with the power raceway to equalize potential
  2. At right angles to the power run Correct answer.
  3. Parallel to the power run for the shortest distance
  4. Through the same conduit with a barrier

Explanation

Crossing power circuits at right angles minimizes the coupled length and therefore the noise induced into the cable. Running parallel to power, or sharing a raceway, maximizes coupling and violates separation rules.

Question 30Copper cable handling and installation

How should horizontal cables be labeled when they are installed?

  1. Only at the work area outlet
  2. With a color code instead of a text identifier
  3. Only at the telecommunications room end
  4. At both ends with the same unique identifier Correct answer.

Explanation

Each cable is labeled at both ends with the same unique identifier so the circuit can be traced and moved without toning it out. Labeling only one end makes identification unreliable.

Question 31Copper cable handling and installation

What is the maximum permitted fill for three or more copper cables installed in a conduit?

  1. 60 percent of the inside cross-sectional area
  2. 53 percent of the inside cross-sectional area
  3. 31 percent of the inside cross-sectional area
  4. 40 percent of the inside cross-sectional area Correct answer.

Explanation

The fill tables permit 53 percent for one cable and 31 percent for two, but limit three or more cables to 40 percent of the conduit's inside cross-sectional area. The reduction leaves room for cables to slide past each other during the pull.

Question 32Copper cable handling and installation

While a 4-pair cable is being pulled into a pathway, what minimum bend radius should be maintained?

  1. 1.5 times the cable outside diameter
  2. 2 times the cable outside diameter
  3. 8 times the cable outside diameter Correct answer.
  4. 4 times the cable outside diameter

Explanation

While a cable is under pull tension the bend radius should be no tighter than 8 times its outside diameter; once installed and under no load, 4 times is allowed. The tighter finished-installation value does not apply during the pull.

Question 33Copper cable handling and installation

Which lubricant should be used when pulling copper cable through a conduit?

  1. Silicone spray applied to the cable jacket
  2. Petroleum-based grease from the shop supply
  3. Soapy water mixed on site
  4. A lubricant approved by the cable manufacturer Correct answer.

Explanation

Only lubricants evaluated for compatibility with the jacket compound should be used; approved products are typically water-based. Solvents and petroleum products can soften, craze, or swell the jacket and leave harmful residue.

Question 34Copper cable handling and installation

How should cable be paid off a reel during installation?

  1. Over the side of the reel while walking backward
  2. From the flange while the reel sits stationary
  3. From the reel turning on a payoff stand Correct answer.
  4. By pulling the coil apart from the center by hand

Explanation

Cable should come off a reel that is free to rotate on an axle or payoff stand so it leaves the reel without twisting. Pulling over a flange or out of a coil introduces twist that appears later as kinks and bird-caging.

Question 35Copper cable handling and installation

How should a pulling rope be attached to a 4-pair copper cable for a conduit pull?

  1. To a single conductor looped back on itself
  2. To the jacket with a knot tied through a slit
  3. To the copper conductors after the jacket is stripped
  4. To the jacket with a listed pulling grip Correct answer.

Explanation

A pulling grip such as a mesh or basket grip spreads the pull load over the jacket and keeps it off the conductors. Pulling directly on conductors stretches them and changes the geometry of the pairs.

Question 36Copper cable handling and installation

Why is a service loop of slack left at a work area outlet?

  1. To permit re-termination if needed Correct answer.
  2. To shorten the electrical length of the link
  3. To increase the tensile strength of the link
  4. To reduce crosstalk between adjacent cables

Explanation

Slack at the outlet provides enough cable to install a new jack or connector when the original termination fails and to allow minor relocations. Slack does not substitute for correct support or separation.

Question 37Copper cable handling and installation

Why must cables in a long vertical raceway be supported at intervals?

  1. To prevent crosstalk between pairs
  2. To reduce the electrical length of the cable
  3. To increase the fill capacity of the raceway
  4. To keep the cable weight off the terminations Correct answer.

Explanation

In a vertical run the full weight of the cable hangs downward, so the cable is supported at the top and at intervals to transfer that load to the structure rather than to connectors and terminations. Unsupported vertical cable can pull out of terminations or deform.

Question 38Copper cable handling and installation

When preparing a Category 6 cable for termination, how much jacket should be removed?

  1. At least 6 in (150 mm) so the pairs fan out easily
  2. Only as much as the termination requires Correct answer.
  3. Enough to expose the spline along the entire cable end
  4. The full length of cable that will sit inside the box

Explanation

Only the jacket needed to reach the termination is removed, and the jacket should extend as close to the termination as the connector allows. Excess jacket removal exposes the pairs to damage and encourages over-untwisting.

Question 39Copper cable handling and installation

Cable has been stored in an unheated space at -5 °C (23 °F). Before it is installed, the cable should be:

  1. pulled immediately while the jacket is stiff
  2. warmed to room temperature first Correct answer.
  3. heated with an open flame until pliable
  4. bent sharply to test flexibility

Explanation

Cold jacket compounds become stiff and crack or kink when bent. Cable stored below the manufacturer's low-temperature limit must be warmed to room temperature before it is handled or pulled.

Question 40Copper cable handling and installation

Which practice applies when routing copper cable near hot water pipes or steam lines?

  1. Bundle the cable tightly against the pipe
  2. Route the cable in contact and add a heat shield
  3. Wrap the cable around the pipe to save space
  4. Keep the cable away from the pipe surface Correct answer.

Explanation

Cable routed against hot pipes or steam lines is heated above its rating, which softens the jacket and increases attenuation. Clearance or thermal insulation must be maintained between the cable and the heat source.

Question 41Copper cable handling and installation

When terminating a 25-pair cable on a 66-type block, how should the pairs be handled?

  1. Cut all pairs to equal length before fanning them out
  2. Separate each pair and lay conductors flat across the block
  3. Unwind and straighten all pairs before terminating any of them
  4. One binder group at a time, twists intact Correct answer.

Explanation

Multipair cable is terminated one binder group at a time so the remaining pairs stay twisted and the color code stays readable. Fanning every pair out at once promotes over-untwisting and mispairs.

Question 42Copper cable handling and installation

Two cables are to be installed in a conduit. What is the maximum permitted fill?

  1. 53 percent of the inside cross-sectional area
  2. 60 percent of the inside cross-sectional area
  3. 40 percent of the inside cross-sectional area
  4. 31 percent of the inside cross-sectional area Correct answer.

Explanation

The fill table allows 31 percent of the conduit's inside cross-sectional area for exactly two cables, 53 percent for one cable, and 40 percent for three or more. With only two cables there is less room to pass one another, so the allowance is smaller than for larger counts.

Question 43Copper cable handling and installation

A large 4-pair cable is pulled around a tight raceway sweep. Which factor most limits how hard the cable can be pulled at that point?

  1. The fill percentage of the conduit
  2. Sidewall pressure at the sweep Correct answer.
  3. The total length of the raceway run
  4. The number of pairs in the cable

Explanation

At a bend the pull tension presses the cable against the raceway wall, and this sidewall pressure rather than the straight-pull tension usually governs how hard the cable may be pulled through a tight sweep. Longer sweeps or a larger raceway reduce the pressure.

Question 44Copper cable handling and installation

Why should several 4-pair cables be pulled through a conduit one at a time rather than all at once?

  1. Lubricant dries out between cables
  2. Tension can exceed the cable limit Correct answer.
  3. Crosstalk increases with each cable
  4. Fill rises each time a cable is added

Explanation

When cables are pulled together, the friction load of every cable adds to the tension carried by the leading cable and the grip, so the limit of the first cable can be exceeded. Pulling them individually keeps each cable's tension within its rating.

Question 45Copper cable handling and installation

What is the concern when many horizontal copper cables are tightly bundled together over a long distance in a pathway?

  1. The bundling improves pair-to-pair balance
  2. The bundle shortens the electrical length of each link
  3. Heat buildup raises attenuation Correct answer.
  4. The bundling removes the need for support

Explanation

Cables bundled tightly over long distances cannot shed heat, so conductors run warmer and attenuation increases; some standards require bundle derating for this reason. Loose dressing and separation let heat dissipate.

Question 46Copper cable handling and installation

After a pull, an installer finds that the jacket of a cable is stretched and its diameter is noticeably reduced. What is the appropriate response?

  1. Reduce the number of pairs used in that cable
  2. Re-twist the pairs and continue
  3. Mark the cable for future testing and install it
  4. Replace the cable before terminating it Correct answer.

Explanation

A stretched jacket with reduced diameter shows the cable was pulled beyond its tension limit, so the conductors are elongated and the pair geometry is permanently changed. The cable cannot be brought back into specification and must be replaced before termination.

Question 47Cable termination

In the T568B wiring scheme, which pin receives the white/orange conductor?

  1. Pin 2
  2. Pin 1 Correct answer.
  3. Pin 6
  4. Pin 3

Explanation

In T568B, pin 1 is white/orange and pin 2 is orange. Pin 3 is white/green, and pin 6 is green.

Question 48Cable termination

What is the maximum length of untwisted pair, in millimeters, permitted at a Category 5e termination?

  1. 3 mm
  2. 50 mm
  3. 13 mm Correct answer.
  4. 25 mm

Explanation

TIA-568 limits untwisted pair at a Category 5e termination to 13 mm (about 0.5 in). Keeping the twist close to the contact helps control crosstalk.

Question 49Cable termination

Which tool is used to seat conductors into a 110-type wiring block?

  1. Cable jacket stripper
  2. 110 punch-down tool Correct answer.
  3. Modular crimping tool
  4. Tone generator with amplifier

Explanation

A 110 punch-down tool seats the conductor and trims the excess in one operation. The blade must match the 110 block.

Question 50Cable termination

When preparing a 4-pair cable for termination on a jack, how much jacket should be removed?

  1. Only enough to reach the contacts Correct answer.
  2. As much as possible to expose all pairs
  3. None; the jacket stays in place
  4. Exactly 100 mm (4 in) for every jack

Explanation

The jacket should be removed only far enough for the conductors to reach their contacts and for the jacket to be held by strain relief. Excess jacket removal leaves pairs exposed and can degrade performance.