What are the 2 key components of an optical fiber?
Core & Cladding
Core & Acrylate
Cladding & Acrylate
Core & Buffer
The refractive index of the fiber core is higher than that of the cladding
A micrometer is
1 billionth of a meter
1 thousandth of a meter
1 millionth of a meter
Which fiber is most common for backbone & horizontal runs within buildings and campus environments
Multimode
Singlemode
OM2
OM1
What is the diameter of the cladding in multimode fiber cable
50um
125um
62.5um
250um
What is the distance limitation of multimode fiber
2,000 meters
3,000 meters
1,000 meters
10,000 meters
Which fiber supports wavelengths of 1310nm, 1490nm, 1550nm & 1625nm
What is the distance limitation of singlemode fiber
5,000 meters
Which fiber supports wavelengths of 850nm and 1300nm
Which fiber generally uses LED and VCSEL light sources
What is the diameter of the acrylate coating in fiber cable
100um
What is the most common tight buffer diameter
900um
3mm
Tight buffer fiber is only installed in multimode fiber
Which type of fiber requires a furcation kit
Tight Buffer
Loose Tube
This type of fiber consists of up to 24 strands bundled together in a single line that is color coded
Ribbon
Air blown
Tight buffer
Loose tube
Air-blown systems are designed & manufactured for an expected operating lifetime of how many years
20
30
10
15
There is no mandatory standard to identify the color coding for fiber
According to standards, horizontal fiber cable is normally ____________
What is the minimum bend radius of a fiber cable, with up to 4 strands, during installation
1 inch
2 inch
4 x diameter of cable
10 x diameter of cable
What is the minimum bend radius of a fiber cable, with up to 4 strands, at rest
What is the minimum bend radius of interbuilding fiber during installation
15 x diameter of cable
20 x diameter of cable
What is the minimum bend radius of a fiber backbone cable at rest
15 x diameter
10 x diameter
20 x diameter
What is the minimum bend radius of an intrabuilding fiber during installation
Which test instruments can be used to test fiber while it is still on the reel (select all correct)
OLTS
VFL
OTDR
Which fiber test instrument does not require access to both ends of the fiber while testing on the reel
It is recommended to order innerduct without a pull sting preisntalled
(2) 1.5 inch and (1) 1 inch innerducts are recommended to be placed inside what size conduit
3 inch
4 inch
6 inch
The service loop is used to relieve all tension of the fiber cable
How much horizontal fiber should be left at the work area
1 meter
2 feet
18 inches
12 inches
How much fiber slack should be left in a cabinet within a TR
10 meters
3 feet
3 meters
When blowing fiber, what carries the cable down the tube
fluid drag
air pressure
vacuum
Air blown fiber shall not be used for outside plant
Which of the following are basic tests to verify each tube prior to blowing fiber (select all correct)
airflow testing
pressure testing
continuity testing
What is the typical air pressure when blowing fiber
150-220psi
150-200psi
100-150psi
200-225psi
Which splicing method has a low consumable cost
fusion
mechanical
Reflectance may be a concern with which type of splicing method
How much fiber typically should be in a splice tray
1-2 meters
1-3 meters
Identify this fusion
fuse time too long
autofeed too low
autofeed too high
fuse current too hot
good splice
What is the maximum splice loss regardless of the methodology
.3dB
.1dB
.75dB
1.5dB
What is the curing cycle for heat cured connectors
20 minutes
10 minutes
5 minutes
15 minutes
Adhesive hardening when terminating anaerobic connectors takes how long
10-20 seconds
15 seconds
1 minute
5-10 seconds
What is the size of the primary acrylate
245um
5um
What is the #1 reason for troubleshooting in optical networks
contamination
core alignment
poor terminations
What is the power range for microscopes to view the end face of an optical fiber connector
100x-800x
100x-200x
200x-400x
This tool is used to inspect the radius of curvature, offset of polish & optical fiber height
Interferometer
This tool can determine end-to-end attenuation & distance to a point of high attenuation during pre-installation testing
Acceptance testing of optical fiber is most often performed with which tester
For singlemode fiber, out-of-band testing may be accomplished at the _____ nm window
1625
1550
1310
1490
What is the worst acceptable loss for a mated pair
.5dB
1.0dB
95% of mated pairs shall be better than ____dB loss
There is currently no maximum bandwidth for singlemode optical fiber
What is the recommended power range for microscopes to view the end face of an optical fiber connector
This tester uses Rayleigh scattering & Fresnal reflection to measure the characteristics of an optical fiber
Shorter wavelengths of light exhibit greater amounts of attenuation because of Rayleigh scattering
Longer wavelengths are more sensitive to bending loss and will allow light to exit out of the fiber core more than shorter wavelengths
What are the most common connectors for multimode fiber (select all correct)
ST
SC
LC