Colorado State Blasters Exam Questions &
Answers Graded 100%
OverPressure - ANSWER-a rapid increase, then decrease, in atmospheric pressure
created by an explosion
Armed Charge - ANSWER-An explosive cartridge that contains a detonator
Artificial barricade - ANSWER-An artificial mount berm or wall of earth with a minimum
thickness of 3 feet
Barricaded - ANSWER-The effective screening of a building or magazine that contains
explosive materials from another magazine or building by natural or artificial barrier
Binary Explosive - ANSWER-A detonator-sensitive high explosive consisting of two
substances, an oxidizer and a fuel, that when mixed together form an explosive.
Black Powder - ANSWER-A deflagrating or low explosive compound of an intimate
mixture of sulfur, charcoal, and alkali nitrate.
Blast Area - ANSWER-The area of a blast within the influence of flying rock missiles,
gases, and concussion.
Blaster - ANSWER-A type 1 individual who is permitted to possess and control the use
of explosives
Blasting Agent - ANSWER-An explosive material which meets prescribed criteria for
insensitivity to initiation
Blasting Mat - ANSWER-A mat of woven steel, wire, rope, scrap tires, etc to cover blast
holes for the purpose of preventing flying rock missiles
Blast pattern - ANSWER-The plan of the drill holes laid out for blasting. Composed of
the burden distance, the spacing distance, and their relationship to each other.
Blast Site - ANSWER-Area where explosives are handled for blasting operations. A
distance of 50 feet is required in all directions from explosive charges, loaded
boreholes, and to be loaded boreholes
Booster - ANSWER-An explosive charge designed to be used in the initiation sequence
between an initiator or primer and the main explosive charge.
, Borehole - ANSWER-A hole drilled in the material to be blasted that contains an
explosive charge
Burden - ANSWER-Distance from the borehole and the nearest free face
Bus wire - ANSWER-Expendable heavy gauge bare copper wire used to connect
detonators
Charge per delay - ANSWER-Any charges firing within an 8 millisecond time period are
considered to have a cumulative effect on vibration and air over-pressure effects. They
are summed within 8-millisecond intervals
Collar - ANSWER-The mouth or opening of a borehole
Connecting Wire - ANSWER-Wire used to extend the firing line or leg wires in the
electric blasting circuit
Cornice - ANSWER-An overhanging mass of windblown snow or ice
Day Box - ANSWER-A portable magazine for the temporary and attended storage of
explosives. Typically a type 3 magazine.
Deck - ANSWER-An explosive charge that is separated from the other charges in the
blast hole by stemming or air cushion
Deflagration - ANSWER-An explosive reaction such as a rapid combustion that moves
through an explosive material at a velocity less than the speed of sound in the material.
Detonating Cord - ANSWER-A cordlike explosive containing a core of high-explosive
material, usually PETN; also called primacord.
Detonation - ANSWER-An EXPLOSION, a chemical reaction/burn that SURPASSES
THE SPEED OF SOUND, creating the detonation velocity which ruptures the outer
container of the explosive, if any.
Detonator - ANSWER-Any device containing initiating or primary explosive that is used
for initiating detonation. Commonly blasting caps and other replacements for electric leg
wires
Down Line - ANSWER-A line of detonating cord or plastic tubing in a blast whole which
transmits detonation from the trunk line to the primer
Electric Detonator - ANSWER-A detonator designed for, and capable of, initiation by
means of an electric current.
Answers Graded 100%
OverPressure - ANSWER-a rapid increase, then decrease, in atmospheric pressure
created by an explosion
Armed Charge - ANSWER-An explosive cartridge that contains a detonator
Artificial barricade - ANSWER-An artificial mount berm or wall of earth with a minimum
thickness of 3 feet
Barricaded - ANSWER-The effective screening of a building or magazine that contains
explosive materials from another magazine or building by natural or artificial barrier
Binary Explosive - ANSWER-A detonator-sensitive high explosive consisting of two
substances, an oxidizer and a fuel, that when mixed together form an explosive.
Black Powder - ANSWER-A deflagrating or low explosive compound of an intimate
mixture of sulfur, charcoal, and alkali nitrate.
Blast Area - ANSWER-The area of a blast within the influence of flying rock missiles,
gases, and concussion.
Blaster - ANSWER-A type 1 individual who is permitted to possess and control the use
of explosives
Blasting Agent - ANSWER-An explosive material which meets prescribed criteria for
insensitivity to initiation
Blasting Mat - ANSWER-A mat of woven steel, wire, rope, scrap tires, etc to cover blast
holes for the purpose of preventing flying rock missiles
Blast pattern - ANSWER-The plan of the drill holes laid out for blasting. Composed of
the burden distance, the spacing distance, and their relationship to each other.
Blast Site - ANSWER-Area where explosives are handled for blasting operations. A
distance of 50 feet is required in all directions from explosive charges, loaded
boreholes, and to be loaded boreholes
Booster - ANSWER-An explosive charge designed to be used in the initiation sequence
between an initiator or primer and the main explosive charge.
, Borehole - ANSWER-A hole drilled in the material to be blasted that contains an
explosive charge
Burden - ANSWER-Distance from the borehole and the nearest free face
Bus wire - ANSWER-Expendable heavy gauge bare copper wire used to connect
detonators
Charge per delay - ANSWER-Any charges firing within an 8 millisecond time period are
considered to have a cumulative effect on vibration and air over-pressure effects. They
are summed within 8-millisecond intervals
Collar - ANSWER-The mouth or opening of a borehole
Connecting Wire - ANSWER-Wire used to extend the firing line or leg wires in the
electric blasting circuit
Cornice - ANSWER-An overhanging mass of windblown snow or ice
Day Box - ANSWER-A portable magazine for the temporary and attended storage of
explosives. Typically a type 3 magazine.
Deck - ANSWER-An explosive charge that is separated from the other charges in the
blast hole by stemming or air cushion
Deflagration - ANSWER-An explosive reaction such as a rapid combustion that moves
through an explosive material at a velocity less than the speed of sound in the material.
Detonating Cord - ANSWER-A cordlike explosive containing a core of high-explosive
material, usually PETN; also called primacord.
Detonation - ANSWER-An EXPLOSION, a chemical reaction/burn that SURPASSES
THE SPEED OF SOUND, creating the detonation velocity which ruptures the outer
container of the explosive, if any.
Detonator - ANSWER-Any device containing initiating or primary explosive that is used
for initiating detonation. Commonly blasting caps and other replacements for electric leg
wires
Down Line - ANSWER-A line of detonating cord or plastic tubing in a blast whole which
transmits detonation from the trunk line to the primer
Electric Detonator - ANSWER-A detonator designed for, and capable of, initiation by
means of an electric current.
