List of top Underground Hazards Questions

An explosive with a density of 1.2 g/cm3 has a heat of explosion equal to 900 cal/g. If the heat of explosion of ANFO with density of 0.8 g/cm3 is 950 cal/g, the bulk strength of the explosive relative to ANFO is_____.(round off up to 2 decimals)
In a self-contained closed-circuit breathing apparatus,