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Exin Exam CDCS Topic 3 Question 3 Discussion

Actual exam question for Exin's CDCS exam
Question #: 3
Topic #: 3
[All CDCS Questions]

What is the calculation for the desired attenuation factor for shielding material?

Show Suggested Answer Hide Answer
Suggested Answer: C

The attenuation factor for shielding material is typically calculated using the formula A = 20 log (R / M). This equation provides the attenuation in decibels (dB), where R represents the measured electromagnetic field strength, and M is the maximum acceptable level. The logarithmic scale helps quantify how much the shielding reduces EMF levels relative to the maximum allowable value.

Detailed Explanation:

This formula calculates attenuation by comparing the measured value with the acceptable threshold, with the result expressed in decibels. A higher attenuation indicates more effective shielding material, essential for environments requiring robust EMF management.

EPI Data Center Specialist References:

EPI standards include the use of logarithmic formulas to evaluate attenuation levels, ensuring that shielding materials provide adequate reduction in EMF to protect sensitive equipment within data centers.


by Ma at Oct 18, 2024, 10:20 PM

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Sue
20 days ago
Haha, Option D reminds me of that time my professor said shielding just 'magically' works. Yeah, right!
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Odette
23 days ago
The formula in Option A looks like it's trying to be fancy, but Option C is the straightforward way to do it.
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Ruthann
6 days ago
I agree, Option C is much simpler and easier to understand.
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Jaleesa
6 days ago
True, but for practical purposes, Option C should work just fine.
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Gayla
8 days ago
Option A seems a bit complicated, but it's just a matter of using the right formula.
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Margart
10 days ago
I think Option A is more accurate though, it takes into account the logarithmic scale.
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Nida
12 days ago
I agree, Option C is much easier to understand and use.
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Dallas
14 days ago
Option A seems a bit complicated, I prefer the simplicity of Option C.
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Caprice
1 months ago
Option D is just silly. Of course we have to calculate the attenuation factor! How else would we know if the shielding is effective?
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Kimi
1 months ago
I remember learning this formula in my EMI shielding class. Option C is the correct one, for sure.
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Sherill
1 months ago
Option A seems logical, but I'm not sure why we're using logarithms here. Shouldn't it be a simple ratio?
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Wenona
8 days ago
User 3: Wenona is correct. The calculation involves logarithms to determine the attenuation factor for shielding material.
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Corinne
18 days ago
User 2: Option A: A = 20 log (M / R) where A is Attenuation, M is the maximum acceptable value, and R is the real value measured.
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Malcom
23 days ago
User 1: Option A seems logical, but I'm not sure why we're using logarithms here. Shouldn't it be a simple ratio?
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Misty
1 months ago
I disagree, I believe the correct calculation is A = 20 log (R / M) because it makes more sense in terms of real value measured
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Rima
1 months ago
I think the calculation for the desired attenuation factor is A = 20 log (M / R)
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