- Impact action
- Rotary action
- Both (a) & (b)
- Cutting and ploughing
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) The Percussive drills works based on _______ cutting principle.
Solution:
a. Impact action
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