24 Questions
What is the maximum untwisting allowance recommended when building your own cables?
1/2 inch for each wire pair
What is the minimum recommended distance required for low-voltage communication cables from any fluorescent lighting fixture?
5 inches
What is the typical outside diameter range for twisted-pair cabling?
0.25 to 0.35 inch
What is the height of a single rack unit?
1.75 inches
What is the purpose of fire sleeves in fire-rated walls or ceilings?
To fill or seal apertures created by pipes or cables
What is the main purpose of fire collars?
To maintain fire resistance levels around pipes and penetrations
What is the primary function of fire covers in fire-rated suspended ceilings?
To expand internally and fill available space with a fire-resistant, highly insulating char
What do fire sealants and gap fillers do when heated at high temperatures?
Expand to prevent the spread of fire and smoke
What does Class 1 Administration address in infrastructure identifiers?
Telecommunications space (TS) identifier
What is required in Class 2 Administration in addition to the identifiers in Class 1 Administration?
Building backbone cable identifier
What is required in Class 3 Administration in addition to the identifiers in Class 2 Administration?
Building identifier
What is required in Class 4 Administration in addition to the identifiers in Class 3 Administration?
Campus or site identifier
What is the maximum length limitation for UTP patch cords in the telecommunications room?
6 m (20 ft.)
What is the minimum bend radius for UTP cable?
4 times the cable diameter
What is the maximum allowed force when pulling UTP cable?
25 lbf (pounds of force)
What is the maximum length limitation for UTP patch cords in the main cross-connect?
20 m (66 ft.)
What is the maximum length limitation for UTP patch cords in the work area?
3 m (10 ft.)
What is the maximum length limitation for UTP patch cords in the intermediate cross-connect?
20 m (66 ft.)
What happens if the cable is sharply bent, twisted, or kinked?
It can cause permanent damage to the cable's geometry and cause transmission failures
What is the minimum bend radius for optical fiber cable?
10 times the diameter
What is the maximum arc into which a cable can be looped before its data transmission is impaired?
Bend radius
What is the recommendation for labeling termination points in an installation?
Label every termination point at both ends with a unique number for each network link
What could exceeding the bend radius do to the cable?
Kink or crimp the copper, causing signal reflections
What is the recommendation for pulling UTP cable?
Use low to moderate force
Test your knowledge of UTP patch cord length limitations and bend radius in this quiz. This quiz will cover the maximum length limitations for main cross-connects, intermediate cross-connects, telecommunications rooms, and work areas, as well as the importance of bend radius in cable installation.
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