#3 Flashcards
(19 cards)
Nonelectric blasting caps…
do not carry lose caps in pockets or in any uncontrolled container.
Electric blasting caps…
always ground yourself before unshunting.
keep caps at least 155m from energized power lines.
always check continuity before use.
Premature detonation of electric blasting caps.
Radio lightning
Radar static electricity
TV signals
Time fuse…
always conduct a 3’ test burn on each roll.
mark each roll with DTG
if roll is not used within 24 hrs. conduct a 3’ test burn.
do not use first and last 6” from a new or partially used roll
tie a half knot in non working end
Shock tube…
never use crimpers to cut shock tube
Det cord…
avoid sharp bends, loops, and kinks as well as stepping on the cord
Det cord…
avoid sharp bends, loops, and kinks as well as stepping on the cord (any of these can change the path of the cord and/or cause a cut in the cord)
RE = 1.66
Should you use blasting caps underground?
No, use M151/M152 boosters
What is the first step you take when conducting a continuity check?
Ground yourself.
How far away from energized power lines should you keep electric blasting caps?
155m
When should you perform 3’ test burn?
On each new roll or if roll has not been used within 24hrs.
What is the minimum fragmentation hazard distance for a charge that has a NEW of less than 27 lbs?
300m
How long should you wait to clear a nonelectric misfire? an electric misfire?
Nonelectric: 30min.
Electric: immediately.
Vehicles should be equipped with what type of fire extinguisher and how many?
2 Class B/C fire extinguishers.
Where are blasting caps stored during transportation?
Shall not be transpos
Where are blasting caps stored during transportation?
Shall not be transported in the same vehicle with other explosive if possible. if no carry caps in the cab in an approved ammunition container.
What are the rules for storage of explosives in a temporary magazine?
no more than 500lbs./pile. and should be placed no less than 140’ apart.
What items can be burned during destruction procedures? Detonated?
Packed or unpacked HE items linear shaped and block/stick demo. Stack piles not to exceed 2000lbs. or 3” thick. anything not encased in metal that might produce shrapnel can be burned
Where should you place initiating charges on piles of explosive that you want to detonate during destruction procedures?
every 4-5’ on top of the pile.
