California Blasters Practice Test

These questions are part of the practice quiz. Start practicing

• What is the typical purpose of establishing a blast boundary around a blasting site?
• Impact and friction detonations will be greatly reduced by
• An explosive with 40% TNT provides more heaving or pushing thrust than an explosive with a larger percentage of TNT that causes a shattering effect.
• Which material should be used to corral burning boxes?
• 1000 blasting cap are equal in strength to how many pounds of dynamite?
• What distance must be kept to park an unattended vehicle from an explosive magazine?
• Blasting accidents are usually:
• What is the composition of ANFO?
• What is the purpose of explosives when doing avalanche control work?
• Detonating cord loses sensitivity when wet.
• Regarding detonation systems, should the system be as complicated as possible to prevent premature initiation of the cap?
• Which of the following is a cause of fly rock?
• What is the required distance, in feet, for avoiding ignition near explosives?
• Which wait time applies after a charge may not have exploded when using electrical caps if the weather is not snow?
• What is the best tool for cutting det cord?
• Emulsions have sensitivity into boreholes as small as 7/8 inch.
• A burning safety fuse burns in what way?
• Millisecond delay connectors for det cord may be fired by what event?
• When hand charging from ski lifts, what is the minimum distance from the target to the closest point on the lift?
• Detonating cord knots; Should you use a plastic sheath when knots are tied?
• The dark residue observed after blasting is caused by which explosive?
• Which statement best describes a Type 4 magazine?
• What is the best tool for cutting det cord?
• What is ammonium nitrate commonly used as in explosives?
• Impact and friction detonations will be greatly reduced by which practice?
• Which term best describes the debris ejected during a blast?
• What is the best tool for cutting fuse cord?
• In fuse ignition during timing tests, which ignition method is specified?
• What happens to detonating cord when it gets wet?
• Standard Safety fuse burns at which rate?
• Which statement best describes outdoor storage limits for a second class magazine?
• When fuse and cap are used and the weather is snow, the minimum wait time is?
• Which device is used to initiate detonation in blasting operations?
• Can water gels emit smoke and toxic fumes?
• What is true about the open end of fuse cap?
• A standard slope charge is equal to how much explosive?
• All fuses must extend to what length beyond the collar of a blasting hole?
• How far away from the ignited charge should the avalanche blaster be?
• Which term is not part of the three classifications of explosives?
• Emulsions can be used in water.
• How often should day mags be inspected?
• How do you test a safety fuse?
• The black residue left behind after an explosive blast is caused by which compound?
• Who is not allowed to handle explosives?
• Which material is used to corral burning boxes during blasting operations?
• Which fire extinguisher rating and quantity are listed as the recommended equipment?
• Can drill cuttings be used for stemming material?
• How many milliseconds between blasts defined as separate blasts?
• During the fuse timing procedure, how far apart should the notches be?
• Which of the following triggers millisecond delay connectors for det cord?
• What must happen to suspend a blaster license?
• Who has control over blasting operations on site?
• Ordinary safety fuse is waterproof
• Which action is essential before starting a blast to ensure safety?
• What is the minimum age for a blaster's helper?
• Under which condition can a blaster's license be suspended?
• Can det cord, dynamite, cast primers, blasting caps, and other detonators be stored together?
• Which statement about blasting safety is true?
• Which of the following are classified as explosive agents?
• Where are the crimps made on a blasting cap?
• ANFO in contact with iron oxides can do what?
• Explosive fires should not be extinguished.
• Type 2 magazine is used for storing high explosives and is described as:
• Which of the following are classified as low velocity?
• During avalanche control work, if a misfire occurs, what is the recommended action before checking it out?
• Which statement best describes permissible methods for placing charges during avalanche control work?
• Carbon monoxide has which characteristic?
• If you have 1000 blasting caps equal to 1.5 pounds of dynamite, how many pounds are equivalent to 2000 blasting caps?
• One 100 foot roll of 50 grain primer cord is equal to how many pounds of dynamite?
• How long should you wait after drilling a hole before it is packed with explosives?
• What is the American Table of Distances used to describe?
• Explosives used for snow blasting have a shelf life for how many seasons?
• How should tamping be done when loading explosives in a borehole?
• Broken safety rules mean what?
• Steel is unsafe in a hole w dynamite mainly because it
• Type 2 magazine is best described as what?
• Detonating cord is manufactured with a core load of
• A Class 3 magazine is also known as a day box.
• What is the most commonly used explosive?
• Which disposal option is considered safe for explosives?
• Which item is NOT listed as part of the group that can be stored together?
• Barricade Natural is defined as:
• What describes the Type 1 magazine?
• Who is responsible for issuing a blasters license?
• Which of the following is a high velocity explosive?
• What is a Type 1 magazine used for?
• How many fire extinguishers and what size are required on a pickup truck hauling explosives?
• A second class magazine may store up to how many pounds of explosives?
• How much explosives can be stored in a second class magazine (day box) outdoors and indoors?
• Which action is prohibited during a misfire?
• To what temperature should a hole be cooled before packing explosives?
• Who issues the permit to the ski resort for use of explosives on the property?
• Type 5 magazine is primarily used for what purpose?
• Which option correctly describes a Type 5 magazine?
• Which agency is responsible for issuing blaster licenses?
• Which statement best defines a Type 3 magazine?
• What is the burn rate of detonating cord?
• What is the purpose of a barricade in blasting safety?
• Magazines for the permanent storage of high explosives should have which combination of protective features?
• A number 10 blasting cap is the largest.
• How is the powder factor calculated?
• What is included in misfire records to determine the cause?
• What material is the core load of detonating cord made of, according to the source?
• Which combination of explosives can be stored together?
• What happens to detonating cord when it gets wet?
• If you are tying multiple knots in det cord should it have a plastic sheath?
• Magazines shall be located at least how many feet from low voltage electric lines?
• Who should you report explosive theft to?
• If the fuse burn rate is 40 seconds per foot, how long would a 5-foot fuse burn?
• Burning speed of a safety fuse is approximately which of the following?
• In avalanche control operations, which of the following is used to transport and store explosives?
• Which statement about how a safety fuse behaves is correct?
• What is a blasting mat?
• In a Class 3 magazine (day box) you can store fuses, capped fuse, and caps together.
• Hand charges and explosive material should be transported in the ski area using which packaging?
• Who controls the time of blasting operation?
• Barricade in blasting safety refers to:
• If there is reason to believe that a charge has not exploded, what is the minimum wait time when electrical caps are used?
• What is the minimum burn time for safety fuse in snow?
• The American Table of Distances is a resource for determining safe distances from inhabited spaces for a given charge.
• In a blasting cap, the explosive is concentrated toward which end?
• What is the primary safety function of a blasting mat?
• A standard slope charge consists of how much explosive?
• A tamping pole can be constructed of which material?
• What safety precaution should be taken with a second class magazine?
• Which materials are listed as explosive agents?
• A tamping pole used in blasting operations is typically made of which material?
• What is the required number of fire extinguishers on a pickup truck hauling explosives?
• At what distance from the explosive magazine should grass, brush, and combustibles be kept cleared?
• Which of the following is a recognized factor contributing to fly rock?
• Which statement best describes the safety impact of a non-electric detonating system?
• How can charges be placed when performing avalanche control work?
• Type 4 magazine refers to a magazine used for storage of specific materials. Which of the following best describes it?
• Stemming is best described as which of the following?
• A six-foot length of safety fuse will burn for how many minutes?
• What is the minimum age of anyone requesting a blaster license?
• What is the length of a piece of safety fuse needed for a burn time of 90 seconds?
• Who has final authority over blasting operations on a site?
• What describes a shunted fuse and cap?
• Breaking safety rules results in what kind of risk?
• Nitrocellulose is a component associated with dynamite's composition. Which option lists a valid dynamite component?
• Which unit is used to express the burn rate of detonating cord?
• There shall be no smoking, open lights, or fire within how many feet of explosives handling area?
• What describes a non-electric system of detonating explosives?
• In avalanche safety, who is designated to warn of further avalanches and keep people out of the run-out zone?
• The burning rate of a safety fuse is approximately:
• During a misfire, the safest immediate action is to:
• A first class magazine is necessary for storing how many pounds of explosives?
• Who is responsible for issuing permits for interstate transport of explosives?
• Who issues the permit for explosives use on private property such as a ski resort?
• Ordinary fuse is okay for snow blasting.
• Magazines shall be located at least how many feet from high voltage electric lines?
• One 100-foot roll of primer cord is equivalent to how many pounds of dynamite?
• Which of the following is part of the correct misfire procedure?
• Which agency has authority over explosive theft investigations?
• Which practice helps protect workers from rock fragments during blasting?
• Who controls the transportation of explosives across highways?
• Dynamite is defined as a mixture containing which of the following?
• What should be done with a misfired borehole's contents after waiting a prescribed time?
• A first class magazine is necessary for storing how many pounds of explosives?
• NOT listed as able to be stored with det cord, dynamite, cast primers, blasting caps, and other detonators?
• Detonating cord should not be plastic coated if there is going to be a lot of knots in the cord.
• How many feet of detonating cord should be left out of a hole?
• Which statement best describes the effect of tamping pressure on fuse rate?
• Which PPE is essential when working near blasting activities?
• Which describes a true statement about tamping pressure in relation to fuse rate?
• ANFO can combust when in contact with iron oxides.
• Which statement best describes the recommended sizing of primer charges relative to the borehole?
• A blasting accident or unusual occurrence affecting the safety of workers should be reported to the state OSHA division within how long?
• Where can explosives be disposed of?
• Which statement best describes nitroglycerin in water gels?
• If 1000 blasting caps are equal in strength to 1.5 pounds of dynamite, what is the dynamite equivalent of 4000 blasting caps?
• A second class magazine may be used to store no more than how many pounds of explosives?
• When should primers be placed into a dynamite cartridge?
• What is the maximum number of fuses a blaster can light at one time?
• What is the likelihood of friction and detonations of detonating cord?
• Type 3 magazine is described as:
• What is the size of the standard explosive?
• Which statement best describes safe misfire handling?
• What is the minimum age of a blasters helper?
• How is the powder factor defined?
• In avalanche safety, who is responsible for warning of subsequent avalanches and restricting access to the run-out zone?
• When a burning charge in a blast hole occurs, its greatest danger is
• Which of the following is NOT a component of a blasting cap?
• Water gels have what percent of nitroglycerin?
• Which agency should be notified within 24 hours after a blasting accident or unusual occurrence?
• Which items must be included in misfire records?
• If there is reason to believe that a charge has not exploded, what is the minimum wait time when a fuse and cap are used?
• Black powder is extremely sensitive to which factors?
• Which blasting materials can be stored together?
• What are the three classifications of explosives?
• Barricade Natural relies on which features?
• What is the best method for testing the time for a fuse?