COLORADO STATE BLASTERS EXAM
ACTUAL 2026 QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTION ALREADY
GRADED A+
Blast pattern - ANSWERS-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 - ANSWERS-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 - ANSWERS-An explosive charge designed to be used in the
initiation sequence between an initiator or primer and the main
explosive charge.
Borehole - ANSWERS-A hole drilled in the material to be blasted that
contains an explosive charge
Burden - ANSWERS-Distance from the borehole and the nearest free
face
Bus wire - ANSWERS-Expendable heavy gauge bare copper wire used
to connect detonators
, Charge per delay - ANSWERS-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 - ANSWERS-The mouth or opening of a borehole
Connecting Wire - ANSWERS-Wire used to extend the firing line or leg
wires in the electric blasting circuit
Cornice - ANSWERS-An overhanging mass of windblown snow or ice
Day Box - ANSWERS-A portable magazine for the temporary and
attended storage of explosives. Typically a type 3 magazine.
OverPressure - ANSWERS-a rapid increase, then decrease, in
atmospheric pressure created by an explosion
Armed Charge - ANSWERS-An explosive cartridge that contains a
detonator
Artificial barricade - ANSWERS-An artificial mount berm or wall of
earth with a minimum thickness of 3 feet
Barricaded - ANSWERS-The effective screening of a building or
magazine that contains explosive materials from another magazine or
building by natural or artificial barrier
ACTUAL 2026 QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTION ALREADY
GRADED A+
Blast pattern - ANSWERS-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 - ANSWERS-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 - ANSWERS-An explosive charge designed to be used in the
initiation sequence between an initiator or primer and the main
explosive charge.
Borehole - ANSWERS-A hole drilled in the material to be blasted that
contains an explosive charge
Burden - ANSWERS-Distance from the borehole and the nearest free
face
Bus wire - ANSWERS-Expendable heavy gauge bare copper wire used
to connect detonators
, Charge per delay - ANSWERS-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 - ANSWERS-The mouth or opening of a borehole
Connecting Wire - ANSWERS-Wire used to extend the firing line or leg
wires in the electric blasting circuit
Cornice - ANSWERS-An overhanging mass of windblown snow or ice
Day Box - ANSWERS-A portable magazine for the temporary and
attended storage of explosives. Typically a type 3 magazine.
OverPressure - ANSWERS-a rapid increase, then decrease, in
atmospheric pressure created by an explosion
Armed Charge - ANSWERS-An explosive cartridge that contains a
detonator
Artificial barricade - ANSWERS-An artificial mount berm or wall of
earth with a minimum thickness of 3 feet
Barricaded - ANSWERS-The effective screening of a building or
magazine that contains explosive materials from another magazine or
building by natural or artificial barrier
