1.

The Engineering News Record Formula, \({Q_a} = \frac{{Wh}}{{6\left( {s\; + \;0.25} \right)}},\) is used for the case of1. Drop hammer2. Single-acting hammer3. Double-acting hammerWhich of the above is/are correct?

A. 1 only
B. 2 only
C. 3 only
D. 1, 2 and 3
Answer» C. 3 only


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