RCDD (RCDD): Mastering Telecommunications Standards 3 — Questions and Answers
Question 1: Under ANSI/TIA-607, what color is designated for grounding conductors in telecommunications grounding and bonding systems?
- Orange
- Green (Correct answer)
- Blue
- Gray
Correct answer: Green
ANSI/TIA-607 designates green as the color for grounding conductors in telecommunications bonding and grounding infrastructure.
Question 2: Which standard governs the administration of telecommunications infrastructure, including labeling and record-keeping?
- ANSI/TIA-606 (Correct answer)
- ANSI/TIA-569
- ANSI/TIA-758
- ANSI/TIA-607
Correct answer: ANSI/TIA-606
ANSI/TIA-606 defines the administration standard for telecommunications infrastructure, covering labeling, records, and reports.
Question 3: What maximum pulling tension is specified by TIA-568 for 4-pair UTP horizontal cable during installation?
- 11 N (2.5 lbf)
- 25 N (5.6 lbf)
- 110 N (25 lbf) (Correct answer)
- 220 N (50 lbf)
Correct answer: 110 N (25 lbf)
TIA-568 specifies a maximum pulling tension of 110 N (25 lbf) for 4-pair UTP horizontal cable to prevent stretching and performance degradation.
Question 4: In a TIA-942 data center design, what tier level requires fully redundant subsystems with no single points of failure and 99.995% availability?
- Tier I
- Tier II
- Tier III
- Tier IV (Correct answer)
Correct answer: Tier IV
Tier IV (per TIA-942) requires fully redundant and fault-tolerant subsystems, delivering 99.995% uptime with no single point of failure.
Question 5: According to ANSI/TIA-568, what is the minimum number of optical fiber strands required in a backbone cable serving a single telecommunications room?
- 2 strands
- 4 strands
- 6 strands (Correct answer)
- 12 strands
Correct answer: 6 strands
TIA-568 requires a minimum of 6 strands of optical fiber in a backbone cable serving a single telecommunications room.
Question 6: Which test parameter in TIA-568 characterizes the difference in propagation delay between the fastest and slowest pairs in a twisted-pair cable?
- Skew
- Delay Skew (Correct answer)
- Propagation Delay
- Phase Jitter
Correct answer: Delay Skew
Delay skew is the difference in propagation delay between the fastest and slowest pairs, critical for parallel transmission systems like Gigabit Ethernet.
Question 7: What does ANSI/TIA-569 specify as the minimum width for a cable tray used in a horizontal distribution pathway?
- 100 mm (4 in)
- 150 mm (6 in) (Correct answer)
- 300 mm (12 in)
- 450 mm (18 in)
Correct answer: 150 mm (6 in)
ANSI/TIA-569 specifies a minimum cable tray width of 150 mm (6 in) for horizontal distribution pathways.
RCDD (RCDD): Mastering Telecommunications Standards 3
Under ANSI/TIA-607, what color is designated for grounding conductors in telecommunications grounding and bonding systems?