माइक्रोमीटर में रुक्षता श्रेणी संख्या ‘N4‘ का मान क्या है?

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ALP CBT 2 Fitter Previous Paper: Held on 23 Jan 2019 Shift 3
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  1. 0.025
  2. 0.05
  3. 0.1
  4. 0.2

Answer (Detailed Solution Below)

Option 4 : 0.2
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वर्णन:

  • ISO ने किसी रेखांकन पर पृष्ठीय रुक्षता निर्दिष्ट करने पर उपयोग की जाने वाली आधिमत रुक्षता मान और संबंधित रुक्षता श्रेणी संख्याओं की एक श्रृंखला अनुशंसित की है।
  • ये मान और श्रेणी संख्याएँ निम्न हैं:

रुक्षता मान,

Ra (μm)

रुक्षता श्रेणी संख्या 

रुक्षता प्रतीक

50

N 12

25

N 11

12.5

N 10

6.3

N 9

∇∇

3.2

N 8

1.6

N 7

0.8

N 6

∇∇∇

0.4

N 5

0.2

N 4

0.1

N 3

∇∇∇∇

0.05

N 2

0.025

N 1

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