10 Questions
What is the minimum thickness of the partition between the top and bottom airways?
40 cm
How often should general lighting arrangements be provided in every travelling roadway normally used by 50 or more persons during any shift?
Adequately
What is the maximum current of the fuse in a caplamp?
3 amp
What is the maximum amount of explosive that can be carried by one person?
5 kg
What is the minimum clearance required for a drill used for boring a shot hole over the diameter of the cartridge of explosives?
0.5 cm
Except in stone drift, how many shots shall be fired in any one round?
10
What is the minimum length of a well-insulated cable used by a shot firer to take proper shelter?
15 m
When two working places belowground have approached within what distance of each other, shall the shotfirer not fire any shot unless all persons have been withdrawn from the other working place?
3 m
What is the maximum percentage of methane allowed in a coal seam before solid blasting is stopped?
0.5 %
How often should protective footwear be supplied to workers in opencast workings?
6 months
This quiz covers the regulations and laws related to welfare officers and management in mines, including the number of welfare officers required and notifications to the Chief Inspector.
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