- 650
- 400
- 625
- 500
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) For a delay blasting of 10 circuits, a sequential timer is set on 25 ms between circuit initiations. If the nominal firing time of a detonator is 400 ms, the last hole will be blasted at _________ ms.
Solution:
(c) 625
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