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California Blasters Test Questions and answers |
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Terms in this set (128)
What is the composition of A.N.F.O? 94% Ammonium Nitrate 6% Fuel Oil
What are some causes of fly rock? Excessive explosives, insufficient stemming
material, angled holes, charges to close to surface
How much explosives can be stored Less than 100 pounds, 50 pounds indoor
in a second class mag? (day box)
Standard Safety fuse burns at which 40 seconds a foot
rate?
All fuses must extend to what length 3 feet
beyond the collar of a blasting hole
What is the maximum number of 12/1 in snow one fuse
fuses a blaster can light at one time?
, Barricade a building or structure containing explosives
effectively screened from inhabited buildings,
another magazine by a natural or artificial barricade
of such height that a straight line from the top of
any sidewall of the building containing explosives
to the eave line of any other magazine or inhibited
structure
Barricade Natural Natural features of terrain such as hills, or timber of
sufficient density that the surrounding exposures
which require protection cannot be seen from the
magazine when the trees are bare of leaves
How many milliseconds between 8 milliseconds
blasts to be defined as separate
blasts?
How many feet of det. cord should 3 feet
be left out of a hole
True or False, det cord loses True
sensitivity when wet
True or False, explosive fires should true
not be attempted to extinguish
true or false, primer charges should true
be close to the same size as
borehole
How long should you wait after 1 hour
drilling a hole before it is packed
with explosives
California Blasters Test Questions and answers |
latest update | instant Download !!
Save
Terms in this set (128)
What is the composition of A.N.F.O? 94% Ammonium Nitrate 6% Fuel Oil
What are some causes of fly rock? Excessive explosives, insufficient stemming
material, angled holes, charges to close to surface
How much explosives can be stored Less than 100 pounds, 50 pounds indoor
in a second class mag? (day box)
Standard Safety fuse burns at which 40 seconds a foot
rate?
All fuses must extend to what length 3 feet
beyond the collar of a blasting hole
What is the maximum number of 12/1 in snow one fuse
fuses a blaster can light at one time?
, Barricade a building or structure containing explosives
effectively screened from inhabited buildings,
another magazine by a natural or artificial barricade
of such height that a straight line from the top of
any sidewall of the building containing explosives
to the eave line of any other magazine or inhibited
structure
Barricade Natural Natural features of terrain such as hills, or timber of
sufficient density that the surrounding exposures
which require protection cannot be seen from the
magazine when the trees are bare of leaves
How many milliseconds between 8 milliseconds
blasts to be defined as separate
blasts?
How many feet of det. cord should 3 feet
be left out of a hole
True or False, det cord loses True
sensitivity when wet
True or False, explosive fires should true
not be attempted to extinguish
true or false, primer charges should true
be close to the same size as
borehole
How long should you wait after 1 hour
drilling a hole before it is packed
with explosives
