Explosion Questions Flashcards
Magazine structures shall be located away from any other building (Excempt for any building that is used solely for capping fuses or making primers). The distance between a magazine and other buildings shall be at least:
100 feet
What is the minimum age for a person to be employed in loading or blasting operations
21
What is considered the safe distance from a magazine for explosives to be opened
50 feet
which of he following regulates the use of explosies?
Construction safety orders of the division of industrial safety
Health and safety code of the state of california
how many inches of wood or equivalent separation are neccessary to transport detonators or capped fuses in the same vehicle?
4
a structure in which more that 100 pounds of explosives are kept is called:
a magazine of the 1st class
Which of the following is a stout box used to store not more than 100 pounds of explosives
a magazine of the second class
what is not correct concerning a magazine of the first class used only to store gunpowder and black blasting powder in a fire resistant and bullet resistant structure
all of the structure must be fire resistant and bullet resistant
all fuses must be long enough to extend beyond the collar of the hole and in no case less than a minimum of how many feet?
3
oils and combustibles shall not be located within how many feet of a magazine building
50
timing of safety fuses shall be such that no charge will explode until at least how long after the last fuse in the blast area is ignited
2 minutes
After electrical blasting, how long must workers wait before approaching the blast site?
5 minutes
Magazine buildings shall be located ____ feet from low voltage electrical lines and ____ feet fro high voltage electrical lines
25, 100
The closest distance a 2nd class magazine may be to another 2nd class magazine shall be:
50 feet
upon the premises where magazines are located, there shall be posted signs with the words “Explosives - keep off” these letters shall be 8” high and within how man feet of the magazine?
100 feet
first class magazine buildings should have which of the following signs on each side?
Magazine
Explosives
Dangerous
Electrical blasting caps shall in no instance be unpacked from their containers or connected for use within how many feet from a point where radio transmitting is carried on?
100 feet
what is used to explode dynamite
a detonator cap
a blasting cap
which of the following must a person have before using blasting powder
blasters license
what is the minimum sistance to store detonators from other explosives? (not i same Building)
50 feet
unattended vehicles shall not be parked within _____ feet of explosive magazines
100
there shall be no smoking, open lights or fire of any kind within ____ feet of any area where exlosives are being handled
50
primers not made up in a make up magazine shall be made up on location at least ____ feet from the 1st class storage magazine and at a safe distance from other workers not involved in the blasting operations.
100
Loading operations shall be carried on the smallest practicable number of persons present and no one but the loading crew, inspection personnel and authorized supervisory shall be allowed within ____ feet of the loading zone.
50
If an electrical storm approaches while loading of electrical blasting is in progress, you should:
order all blasting caps short circuited immediatley
what is the proper method of disposing of non-explosive caps?
burn them
why is nitroglycerin not used in shooting rock
it is too explosive
it is too fast
it can not be controlled
what physical effect may follow when someone handles dynamite without using gloves?
Headache
what type of rock is black blasting powder used for?
Soft rock
how many pounds does a keg of powder weigh?
25lbs
what percent dynamite is used in blasting hard rock
60%
what percent dynamite is used in blowing stumps?
40%
what is the hole called that is drilled from underneath to blow out bottom rock and leave the upper rock for future shooting?
Lifter/snake hole
what is drilling a hole in the center of a boulder called?
block-holing/pop shot
