Answer Posted / deepak

Noise vibration and harshness is related to machinery, sound waves for horn, music system and of course for automobile
If the 0 db then good( No NVH) silence zone
if 10-20 low
if 20-30 moderate
if 30-40 high
if 40-50 very high
above this is not safe for human being, up to 40 is limited for human being

Can some one please show me the design of a POT Bearing.

2613

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Discuss the role of manganese in alloying steels?

1209

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Is there a lower limit to the gland surface finish for static O-rings, gaseous system? surface finish table lists 0.41-0.81 micro-meters for static gaseous systems. What is the drawback of using a smoother surface finish lower than 0.41?

1890

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Respected sir please send placement paper of bpcl

2676

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Discuss various surface finishing processes?

1208

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How will you size a pipe?. What is Darcy's formula?. From where you will get friction factor "f" ?. In darcy formula substitute f = 16/Re and now you see hf proportional to V instead of V square. How do you explain?.

2254

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What does 0.125 inch stand for in 0.125 inch npt thread?

917

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An employ has after increment has Gross Salary 22000 rupees per month. Earlier he was covered in ESI . now should we deduct ESI from his salary or not.

1450

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How to find the amount of natural gas required to produce 1kwhr of energy?

2361

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Define the least count

1041

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Explain the opening and closing of water to the bowl of the purifier

2246

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What is the turbine and how does it work?

1113

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Explain how can heat be applied to acrylic?

1040

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what is the basic need for designing the bottle filling machines

2303

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Is pipe round because it provides the least area to volume ratio?

1187

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