SCTE - Broadband Transport Specialist ch 5-8

CH 1 T/F: When examining optical fibers, if the fiber is not active, using a video fiber scope is optional.

False

Which of the following is true about glass splinters?

They are easily removed with a tweezer.

They need to be handled with great care because they pose significant danger to skin and eyes.

They can be easily seen on most backgrounds.

They need to be handled with great care because they pose significant danger to skin and eyes.

Which of the following statements about using alcohol as a cleaner are true? (choose 4)

Alcohol is used for cleaning connectors and other optical interfaces.

When working with alcohol, any dispenser can be used.

If alcohol vapors are inhaled, they can damage your liver and kidneys.

Alcohol vapors are highly flammable and burn with a nearly invisible flame.

Alcohol produces vapors that can damage your eyes.

Alcohol is used for cleaning connectors and other optical interfaces.

If alcohol vapors are inhaled, they can damage your liver and kidneys.

Alcohol vapors are highly flammable and burn with a nearly invisible flame.

Alcohol produces vapors that can damage your eyes.

T/F: After aiming a fiber at an infrared detection card and seeing no indication of light, it is safe to look directly into the end of a fiber.

False

T/F: To amplify the optical signal, optical amplifiers automatically convert the optical signals to electrical and then back to optical again.

False

What tool is designed to break if the pulling tension is exceeded?

Cable puller

Cable block

Break-away swivel

Pulling grip

Break-away swivel

Test equipment lasers operate at a very low power output of:

.8 mW

5 mW

1W

50 nW

.8 mW

When shipping/receiving reels of fiber, ensure the cable arrives ready to use. Verify the following: (choose 2)

both ends are sealed to ensure no moisture gets into the fiber and no filling compound escapes

tails to secure to the reel to prevent them from coming loose

inspect reel for physical damage after unloading

only non-experienced operators should use the unloading equipment

during towing, keep the reel in the center of the trailer

both ends are sealed to ensure no moisture gets into the fiber and no filling compound escapes

tails to secure to the reel to prevent them from coming loose

In cable systems today, what are the most common lower dispersion 1310 or 1550nm optical fiber LASERs used in the headends?

DFB

FP

EDFA

YDFA

YAG

DFB

Exposure to 5mW to 500mW lasers can cause all EXCEPT:

retinal burns

skin burns

cataracts

eye abrasions

eye abrasions

What type of tweezer tips assure a firm grip on fiber's glass and provide easy handling for proper disposal?

adhesive

rubber

diamond

plastic

teflon

teflon

It is the simplest, cost effective, least performing type of LASER transmitter that exhibits high dispersion?

FP

DFB

EDFA

YDFA

YAG

FP

How is a glass splinter different from a wood splinter? (choose 2)

Minor surgery may be required to move the glass

Very easy to detect visually

Does not fester and get pushed out

A tacky mat is used to secure wood splinters

Minor surgery may be required to move the glass

Does not fester and get pushed out

How are distributed feedback lasers rated by ANSI?

1

2A

3B

4

3A

3B

What allows a cable operator to winch more than one cable at a time while preventing the cable from turning?

floating jig or overlash jig

90 degree corner block

cable blocks that use support rings when necessary

45 degree corner block

floating jig or overlash jig

Which statement is true about distributed feedback (DFB) LASERs?

operate at 1310 and 1550 nm wavelengths

do not use amplitude modulation

only operate in the upstream using TDMA

amplify RF signals

operate at 1310 and 1550 nm wavelengths

This laser's direct exposure is hazardous and the reflected beam off surfaces may not be harmful. The laser is also the typical telecommunications laser found in cable television. What class laser is being referred to here?

1

2A

3B

4

3B

NEC 770 identifies the different types of optical cables. Which type of cable uses metallic strength members?

Conductive

composite

Noncunductive

Conductive

What is the name of the card that may be used to test for the presence of light?

photosensitive

LASER

light

Z-136

class III

photosensitive

T/F: Chemicals such as isopropyl alcohol, acetone degreasers and sealing compounds can pose hazards if proper precautions are not taken.

True

T/F: Technicians who will be cleaving the fiber and removing it from the end of the optical fiber cable using tools, should not wear safety glasses.

False

T/F: Safety is the primary purpose of performing underground service locates prior to installing underground cables in a right-of-way or underground location.

True

Which PPE must meet the ANSI Z-87 standard?

work boots

hard hat

gloves

safety glasses

safety glasses

Provide a safe, effective way to eliminate over pulling of optical fiber cable.

breakaway swivels

corner blocks

winches

capstans

breakaway swivels

T/F: The FP LASER has a lower power output than a DFB laser and a less coherent output.

True

CH 2 What is the bend radius for a loaded fiber optic cable?

10 times the diameter of the cable

20 times the diameter of the cable

10 times the radius of the cable

20 times the radius of the cable

20 times the diameter of the cable

What is the bend radius for an unloaded fiber optic cable?

10 times the radius of the cable

20 times the radius of the cable

10 times the diameter of the cable

20 times the diameter of the cable

10 times the diameter of the cable

T/F: All fiber optic cables do not need to be bonded to the common utility ground at the pole.

False

Which is the preferred option for supporting fiber optic cables on poles?

Overlashing the cable to another cable and strand.

Use a self-supporting cable from pole to pole.

Lashing the fiber optic cable to a high-strength steel wire.

Lashing the fiber optic cable to a high-strength steel wire.

Which method of underground installation opens the ground, installs the cable and closes the ground in one operation?

Trenching

Boring

Plowing

Plowing

What is the coiled slack or extra fiber cable required for the drive off or moving reel aerial installation method?

15m or 50'

30m or 100'

45m or 150'

7.5m or 25'

15m or 50'

What is required when entering a confined space?

functioning air monitor

remove jewelry and other metal objects

a second technician or supervisor

a permit

functioning air monitor

The bend radius of a loaded cable is ____ times the diameter of the cable.

5

10

20

3

20

The 2 general methods of direct burying fiber optic cable are direct ____ and trenching.

plowing

hand-digging

cable jetting

plowing

Unloaded had the cable under no tension at all or up to a residual tension of around ____% of maximum pulling tensions.

25

50

75

80

25

What is important before pulling out a new fiber optic cable onto the strand? (choose 2)

downguys are installed and tensioned correctly

deadends are installed and tensioned correctly

fiber cable map has been walked and as-built maps are updated

poles are properly bonded/grounded to commercial power

downguys are installed and tensioned correctly

deadends are installed and tensioned correctly

T/F: When cable rollers are spaced too closely together it will reduce the pulling tension during installation.

False

What is used to install fiber optic cable in a sodded yard that will likely result in the least visible damage to the property?

plowing machine

trenching machine

digging machine

hand shovel

plowing machine

What is the maximum strand tension?

80% of strand tensile strength

20% of strand tensile strength

40% of strand tensile strength

60% of strand tensile strength

60% of strand tensile strength

During the moving reel or drive off method, ____ occurs as the fiber optic cable is paid out.

lashing

jigging

splicing

lashing

What is the rule of thumb on fiber cable sag?

1% of span length

5' for every 50' of span

depends on the distance between pole and ground

sag is determined by tensile strength of the cable

1% of span length

During the back pull method, the fiber cable reel should be setup beyond the first pole, at ____ the distance of the height of the cable setup chute.

half

2X

3X

none of these

2X

T/F: During trenching, a technician should use spray paint to mark the fiber path making it easier to locate the fiber later.

False

When pulling cable through a series of 90 degree bends, use the ____ method so the tensile strength is not exceeded.

figure eighth

low tensile

loaded

unloaded

figure eighth

The preferred option for supporting aerial fiber cable.

self-supporting that can be strung pole-to-pole

lashing to a high strength steel strand

overlash the fiber cable to another cable and strand

lashing to a high strength steel strand

What type of pulling technique is used to reduce pulling tension inside of conduits?

mid-point

pull line

back pull

figure 8

mid-point

The optical cable is pulled out into place ____ the strand and suspended by use of cable blocks.

beneath

above

along side

beneath

What is required during a post construction inspection? (choose 3)

test connectors to verify proper attenuation values

check for left behind rollers that were used for fiber cable placement

verify proper storage of excess or slack fiber cable

look for missing pole rise guards that are used to protect fiber cable

check for left behind rollers that were used for fiber cable placement

verify proper storage of excess or slack fiber cable

look for missing pole rise guards that are used to protect fiber cable

Fiber optic cable may be lashed along power lines with no danger of inductive interference. What is the recommended distance required?

40" or 102cm

20" or 51cm

10" or 25cm

80" or 204cm

40" or 102cm

What is the moving reel method that is used when the entire route can be traversed by a reel-carrying vehicle?

drive off

back pull

stationary

pull in

drive off

During installation, is the cable's maximum allowable tensile load higher or lower than the tensile load after installation?

Higher

Lower

Higher

What is used above a fiber cable to locate it after it is buried?

tracer tape

copper messenger

steel conduit

nothing is required, it is part of the cable

tracer tape

Always secure required ____ before plowing, trenching, and boring.

permits

strand down-guy

homeowner permission

permits

Strand sag is to compensate in yearly variations in ____.

temperature

weathering

fiber cable aging

plant upgrades

temperature

What is the name of the tool used to test fiber cable pulling tension?

a dynamometer

a signal lever meter

an optical power meter

OTDR

a dynamometer

The tensile strength of SMF optical cables should be at least ____ pounds.

200

300

400

500

600

600

What must be considered before placing fiber cable in a conduit? (choose 2)

clearance between the walls of the conduit and other cables that ay be present

the maximum bend radius should be exceeded

pulling force needed to get the cable between the conduit or duct

fittings must cause the cable to make sharp bends or be pressed against corners

What is normally stored for excess or slack loops at regular intervals during the installation?

An additional 5% of the total cable span

An additional 10% of the total cable span

An additional 15% of the total cable span

An additional 20% of the total cable span

An additional 5% of the total cable span

What construction method is used when buried fiber cable must be passed under roads, driveways, and railroads?

plowing

trenching

boring

underground conduit

underground ductwork

boring

What is the coiled slack or excess fiber cable required for the drive-off or moving reel aerial installation method?

15m or 50ft

30m or 100ft

45m or 150ft

7.5m or 25ft

15m or 50ft

What is the recommended distance for fiber cables so they are below the frost line?

3in or 7.5cm

6in or 15cm

15in or 35cm

30in or 76cm

30in or 76cm

CH3 Which tool is used to remove the bindings that secure the buffer tubes?

Diagonal cutters

Seam ripper

Ring tool

Mid-span slitter

Seam ripper

Which of the following PPE should be used when preparing the cable for splicing?

Gloves

Hard hat

FVD

Safety glasses

Gloves, Safety glasses

T/F: When performing an aerial splice, the opening and splicing of the cable will be done in the air with a bucket truck.

False

Place the steps for preparing the fiber for cable entry in the correct order.

Remove all the wrappings holding the fiber tubes

Remove the outer protective jacket.

Remove the corrugated armor.

Remove the outer protective jacket.

Remove the corrugated armor.

Remove all the wrappings holding the fiber tubes.

For a end access, what step happens after performing a ring cut to score the cable?

Remove the split jacket

Flex the cable to snap the armor.

Remove the end section

Unwind the exposed buffer tubes.

Flex the cable to snap the armor.

For a mid-span cut, how far apart should your two ring cuts be?

36"

48"

72"

96"

72"

Place the steps for protecting the fiber in the correct order.

Route the fiber.

Connect the fiber to the fiber tray.

Install the fiber in the enclosure.

Install the fiber in the enclosure.

Route the fiber.

Connect the fiber to the fiber tray.

What is used to secure the strength member bracket to the cable?

Nut and bolt

Zip tie

Screws

Hose clamp

Hose clamp

Which of the following steps for preparing the cable for fiber cable entry is where you "Remove the corrugated armor?"

Step 3

Step 2

Step 1

Step 4

Step 2

Which is true about fiber optic closure grip requirements?

Handles 100 lbs of pull for 30 minutes

Handles 50 lbs of pull for 40 minutes

10 to 20 foot waterhead test

5 to 10 foot waterhead test

Handles 100 lbs of pull for 30 minutes

What is the first step in preparing a fiber optic cable for cable entry?

Pull the zip strings to split the sheath

Remove all wrappings and clean the buffer tubes

Remove the outer protective jacket and corrugated armor

Mark the ringing location that the cable will be stripped with tape

Mark the ringing location that the cable will be stripped with tape

Which of the following is correct about fiber optic enclosures?

Handles 20 lbs of pull for 10 minutes

Not necessary for all-dialectric cables

Necessary for all-dialectric cables

Supports vented closures

Not necessary for all-dialectric cables

What is the proper way to attach the fibers to the buffer tray?

bond clamp

hose bracket

strain relief and zip-ties

tie down bolt

strain relief and zip-ties

T/F: Jackets, buffer tubes, and other outer layers can we removed with wire strippers, cutting pliers, utility knives, and other common tools.

True

For an end-access of an optical cable how far from the end should you mark the cable for the first wring?

6"

12"

18"

20"

6"

Which of the following criteria is NOT used to determine the type of closure needed to protect the fiber cable?

number of fibers that fit the enclosure

housing materials used

type of closing mechanism

shrink, sealing tape, and grommets used

shrink, sealing tape, and grommets used

When doing a mid-span access, you must start by making two marks that identify the part of the cable you will be accessing. These marks must be ____ inches apart.

24

36

72

96

72

T/F: You should evaluate the surface of the fiber cable prior to prepping the fiber.

True

What tool is used to remove metal strength members in fiber optic cable?

wire cutters

wire strippers

scissors

utility knife

wire cutters

What tool is used to remove the buffer tube binding wraps?

Kevlar cutter

Seam ripper

Duct slitter

Ring tool

Seam ripper

CH 4 What is the typical loss for a mechanical splice?

0.01 to 0.02 dB

0.02 to 0.03 dB

0.1 to 0.15 dB

0.2 to 0.25 dB

0.2 to 0.25 dB

What is the typical loss for a fusion splice?

0.01 to 0.05 db

0.1 to 0.5 dB

0.2 to 0.25 dB

1 to 1.5 dB

0.01 to 0.05 dB

Which of the following are reasons to use a mechanical splice instead of a fusion splice?

Very low loss

Cost

Speed of assembly

Very low reflectance

Cost

T/F: Polished ends can be used for connectors and splicing.

False

T/F: You must always clean the bare fiber with 99% isopropyl alcohol after removing the coatings.

True

T/F: You should only use a work bench cleaver. Hand held cleavers should not be used.

False

Why is an index matching gel used for mechanical splices?

To lubricate the mechanical connection

To reduce the amount of reflection loss

To prevent water mitigation

To reduce the amount of reflection loss

T/F: An arc calibration should be done before doing a fusion splice.

True

T/F: When connecting the fiber in the fiber tray, you should use the entire tray and leave about two to four feet of exposed fiber in the tray.

True

What type of connector is designed to be used in high-vibration environments?

ferrule connector (FC)

standard connector (SC)

local connector (LC)

mechanical transfer registered jack (MT-RJ)

ferrule connector (FC)

T/F: Green SC/APC connectors have better return loss than blue SC/UPC connectors because they have an angled polish.

True

Which statement is are true about reflections?

The amount of reflection depends on the return loss of the connector.

Reflections are only an issue in cold climates.

Reflections that are fed back into the transmitting laser can degrade laser performance.

Air gaps can cause reflections.

The amount of reflection depends on the return loss of the connector.

Reflections that are fed back into the transmitting laser can degrade laser performance.

Air gaps can cause reflections.

T/F: A faulty fiber splice is an example of an intrinsic factor.

False

T/F: Per the IEC 61300-3-35 standard the core can not have any scratches or defects.

True

T/F: Single-mode fiber is more sensitive to misalignment since it has a larger core than multimode fiber.

False

What is done to the fiber optic cable before it is inserted into a pre-terminated connector?

the fiber is stripped, cleaved, and polished

the fiber is stripped, cleaned, and cleaved

scribe and break the fiber

square the fiber end face to 1 to 2 degrees

the fiber is stripped, cleaned, and cleaved

Once a fiber is stripped, it needs to be cleaned. What percentage is the amount of isopropyl alcohol recommended for cleaning fibers?

99

95

80

85

99

A disconnectable device used to connect a fiber to a source, detector, or another fiber.

connector

splice

coupler

splitter

diplex

connector

When aligning fibers to be spliced the end faces should be perfectly ____.

perpendicular

oval

concentric

on axis

perpendicular