Minimum bend radius for balanced twisted pair 4- pair during installation
twice the diameter of cable
four times diameter of cable
2 inches
4 inches
Minimum bend radius for Intrabuilding optical fiber during installation
10 times outside diameter
15 times outside diameter
20 times outside diameter
Minimum bend radius for Backbone Optical fiber at rest
Minimum bend radius Interbuilding optical fiber during installation
Before work begins, it is important to secure the area to ________________ access to unauthorized personnel only.
Allow
Permit
Restrict
What can be used to designate a work zone, area (select all that apply)
safety cones
yellow tape
folding A frame signs
What is the most common environmental hazards faced by the installer
Falls and trip hazards
chemical hazards
electrical wires or equipment
All firestopping solutions area a combination of fire stop materials, devices, packing materials that make up a listed system. Use only __________ __________ to properly restore the penetration of any fire or smoke rated barrier.
Approved methods
Approved materials
Listed assembies
As-built drawings are sometimes called record drawings to the general contractor or building owner.
What tasks should be done after the cable is pulled ( select all that apply )
Label all ICT components
Update the building floor plans
Perform housekeeping items
Allow no more than two 90 degree bends per 30 m = (100 ft) pull if in conduit
Controlling bend radius and friction can prevent damage to the cable. A ___ in. diameter smooth static pipe or ____ in. roller will help to maintain proper bend radius limits.
2, 1
3, 2
4, 3
Service slack for ____________ ____________ shall reach the farthest corner of the TR via pathways and add the distance from floor to ceiling.
Copper backbone cables
Horizontal copper cables
Optical fiber cables
_____________ _____________ shall have enough slack to reach the farthest corner of the backboard via pathway in case new equipment is added later.
Copper backbone
Horizontal cables
Optical fiber
Optical fiber backbone cables shall require the same slack as optical fiber horizontal cables.
Balanced twisted pair horizontal cables shall have _______ of slack left in the work area to allow for ______ after termination. Cables shall not be stored in loops.
1 ft. - 1.6 ft.
1.6 ft. - 1 ft.
10 ft. - 3.3 ft.
Optical fiber cables shall have 1 m = (3.3 ft. ) of slack left in the work area to allow for termination.
A conduit 2 in. or less must maintain a bend radius of at least ____ times the internal conduit diameter.
6
8
10
A conduit greater than 2 in. should maintain a bend radius of at least ___ times the internal conduit diameter.
The maximum pull force for 4 pair 24 AWG cable is ___ lbf. the maximum pull force for two to four strand optical fiber is ___ lbf.
20, 40
25, 50
25, 75
It is acceptable to use structural steel ( red iron ) to directly support cables.
Pull string tensile strength ratings range from ______ to ______ lbf.
50 - 200
75- 200
75- 225
Only tested and accepted lengths of optical fiber are to be installed. What test instruments are typically used to test optical fiber on the reel? select all that apply
Visual fault locator (VFL)
Optical loss test set (OLTS)
Optical time domain reflectometer (OTDR)
Which test instrument requires access to both ends of the cable?
VFL
OTDR
OLTS
Where optical fiber cables will be used, consider placing three innerducts ( two 1.5 in. and one 1 in. ) inside each _______ conduit.
4 in.
6 in.
8 in.
Placing the optical fiber cables in a multi-weave wire mesh grip of appropriate size that has a swivel pulling eye is the preferred method for attaching this fiber to a pull rope
loose tube
tight buffer
ribbon
Preferred method for attaching tight buffer fiber to a pull rope
securing aramid yarn strength member
wire mesh grip
3 half hitches and a knot
How much optical fiber cable slack should be left at the at the work area
3.3 ft.
10 ft.
farthest point of work area
In air blown fiber, fluid drag is what carries the cable down the tube
Air blown fiber is only recommended for inside plant applications.
In air blown optical fiber installations, air pressure is typically between ______and ______ psi.
150- 220
150- 250
This cable shall have enough slack to reach the farthest corner of the TR via pathways, add floor to ceiling and an additional 10 feet. (Select all that apply )
Horizontal Optical fiber
Backbone Optical fiber
Horizontal Copper
