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Exin CDCP Exam - Topic 6 Question 27 Discussion

An optical fiber cable comes with the specifications 50/125 um.What do the numbers represent?
B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
A) The first number represents the distance for a 10 Gb/s connection; the second number represents the distance for a 1 Gb/s connection.
C) The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.
D) The first number represents the required distance to single-phase power cabling; the second number represents the required distance to three-phase cabling.

Exin CDCP Exam - Topic 6 Question 27 Discussion

Actual exam question for Exin's CDCP exam
Question #: 27
Topic #: 6
[All CDCP Questions]

An optical fiber cable comes with the specifications 50/125 um.

What do the numbers represent?

Show Suggested Answer Hide Answer
Suggested Answer: B

Optical fiber cables are composed of a core, a cladding, and a coating. The core is the central part of the fiber that carries the light signal. The cladding is the layer surrounding the core that reflects the light back into the core and prevents signal loss. The coating is the protective layer that covers the cladding and provides mechanical strength and environmental protection. The specifications of an optical fiber cable indicate the dimensions of the core and the cladding in microns (m), which are one millionth of a meter. For example, a 50/125 m cable has a core diameter of 50 m and a cladding diameter of 125 m. The coating diameter is usually 250 m, but it is not part of the specifications.


by Leanora at Oct 23, 2024, 05:01 PM

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Nieves
9 months ago
Core is 50 microns, cladding is 125 microns. Classic fiber spec!
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Craig
9 months ago
Definitely not about distances for connections, that's for sure.
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Estrella
10 months ago
Wait, are you sure about that? I thought it was something else.
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Nina
10 months ago
Totally agree, it's all about the core and cladding sizes!
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Elke
10 months ago
The first number is the core diameter, and the second is the cladding diameter.
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Fanny
10 months ago
I thought the numbers were related to data speeds, but now I'm leaning towards them being about the physical dimensions of the fiber.
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Magnolia
10 months ago
I practiced a question like this before, and I feel like the first number definitely refers to the core diameter. The second might be cladding, but I can't recall for sure.
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Rhea
11 months ago
I remember something about 50/125 um cables, and I think it has to do with core and cladding sizes. Option B sounds right to me.
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Tegan
11 months ago
I think the first number is about the core diameter, but I'm not sure if the second one is for cladding or something else.
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Terina
11 months ago
I'm not entirely sure about this one. The wording is a bit ambiguous, and I could see the numbers representing different things. I'll have to carefully consider each option before making a decision.
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Lynette
11 months ago
I'm confident that the numbers represent the core and cladding diameters. The 50/125 um specification is a common one for optical fiber cables.
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Lavonna
11 months ago
Okay, I think I've got this. The first number is the diameter of the core, and the second number is the diameter of the cladding, both in microns. That makes the most sense to me.
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Linsey
11 months ago
I'm a bit confused by this question. I'm not sure if the numbers represent distances, diameters, or something else. I'll have to think about this one carefully.
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Jodi
11 months ago
Hmm, this one seems pretty straightforward. I'm pretty sure the numbers represent the core and cladding diameters of the optical fiber.
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Tish
2 years ago
Wait, is this a trick question? I bet the answer is something weird, like the first number is the number of times you need to wrap the cable around a unicorn's horn to get the right refractive index. Just kidding, but this is definitely tripping me up.
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Irma
2 years ago
Oh, I see now. Thanks for the explanation!
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Erick
2 years ago
C) The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.
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Rashad
2 years ago
That makes sense, thanks for clarifying!
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Bettyann
2 years ago
B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
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Dexter
2 years ago
Option B is the only one that makes sense. I bet the person who wrote this question is trying to trick us, but I'm not falling for it! This is basic fiber optic knowledge.
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Verlene
2 years ago
It's important to know these specifications when working with optical fiber cables.
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Evangelina
2 years ago
Yes, understanding the core and cladding sizes is crucial for proper installation and performance.
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Ryan
2 years ago
Definitely, the first number is the core diameter and the second number is the cladding diameter.
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Nydia
2 years ago
I agree, option B is the correct one.
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Rose
2 years ago
Hmm, I've heard of fiber optic cables, but the 50/125 thing is new to me. I wonder if it's like 50 miles/125 miles or something? Nah, that can't be right.
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Rachael
2 years ago
C) The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.
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Robt
2 years ago
B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
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Lorean
2 years ago
A) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
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Tenesha
2 years ago
I agree with Kaitlyn. The first number is for the core and the second number is for the cladding.
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Brock
2 years ago
The first number definitely refers to the core diameter, and the second to the cladding diameter. No way it's about connection speeds or power cabling distances.
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Aracelis
2 years ago
User 3: So the answer is B) The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
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Julianna
2 years ago
User 2: I agree, it's definitely not about connection speeds or power cabling distances.
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Michael
2 years ago
The first number is the core diameter, and the second is the cladding diameter.
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Kaitlyn
2 years ago
I think the numbers represent the diameter of the core and the cladding.
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