- Iron
- Steel
- Copper
- Lead
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) A Shaft used in most of the Machinery is made of
Solution:
Shaft used in machinery is generally made up of Steel. It provides desired strength as well as prevents from rusting unlike wrought iron.
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