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BC Mining Shiftboss Main Exam:
Supervisor Certification and
Regulatory Knowledge.
"Can Nonels be used in areas of possible stray current?" - Answer: ✅✅Yes, Nonels are not a conductor of electricity.
"What is the recommended exposure time for a Nonel detonator assembly in n explosive that uses fuel oil as a component?" - Answer: ✅✅6 days (15 days for Nonel XT)
"How should a blasting cap be attached to a detonator cord such as primacord?" - Answer: ✅✅It should be taped into position and the end of the cap must be positioned with the base of the cap pointing in the direction of initiation.
"How should a blasting cap be attached to a procore primer or other high strength cast primer?" - Answer: ✅✅The end of the cap should be positioned within the primer, pointed in the direction of the main charge.
"What is the detonation velocity of detonating cord?" - Answer: ✅✅~22,000f/s or 6,075m/s
"Can detonating cord be lit with a match?" - Answer: ✅✅Detonating cord cannot be lit with a match.
"What is the chemical composition of the explosive used in detonating cord?" - Answer: ✅✅Pentaerythritol tetranitrate.
"How is the explosive strength of detonating cord usually expressed?" - Answer: ✅✅In grams of PETN per meter of foot of cord.
"What is a detonating connector relay?" - Answer: ✅✅A detonating connector relay is a nonelectric device which provides a short interval delay in a detonation cord circuit. It is also known as a delay connector, MS connector, or a relay.
"How is a pigtail detonating connector attached to detonating cord?" - Answer: ✅✅By a square knot or by taping together, with 4 overlap."
"What is the purpose of Nonel MS connectors?" - Answer: ✅✅Nonel MS connectors are used with detonating cord to provide millisecond delay intervals along a line of propagation.
"How should detonating cord be cut?" - Answer: ✅✅With a crimper, knife, or cord cuter on a slight angle and with a pulling motion.
"Why should newly cut ends of detonating cord be sealed?" - Answer: ✅✅Newly cut ends should be sealed with tape or plastic sleeves to keep the explosive core clean and dry, as well as to prevent the PETN core from spilling out.
"May a factory splice (an overlap connection secured by a string tie) as found on a reel of detonating cord be used in a blasting circuit?" - Answer: ✅✅No, the string should be removed and a connection made using a standard knot.
"Are a plastic connector and a plastic detonating connector the same thing?" - Answer: ✅✅No, a plastic connector is used to connect downlines to trunks. It does not contain explosives and should not be confused with a plastic detonating connector.
"What length of overlap is recommended when taping 2 lengths of detonating cord together with electricians tape?" - Answer: ✅✅4 inches (10cm).
"What type of detonator is recommended to be used to initiate detonating cord?" - Answer: ✅✅A High Strength" detonator."
"How should the detonator be oriented when taped to detonating cord?" - Answer: ✅✅The base end of the detonator should be taped pointing in the direction of the initiation or shock wave path.
"How should detonator cord be unreeled?" - Answer: ✅✅By using a handheld rod or stand.
"What are 2 kinds of non-electric detonating delay systems?" - Answer: ✅✅"A) Nonel system
B) Cordline system
"How are Nonel assemblies connected into a circuit?" - Answer: ✅✅Trunkline (detonating cord) is used to connect Nonel assemblies into a circuit. The type and strength of cord depends on the Nonel assembly being used.
"Why should Nonel tubing never be cut?" - Answer: ✅✅Moisture will enter the tubing and the explosive lining will be rendered insensitive. Also, a blowout will occur through the cut end and the detonator may not initiate.
"How is Nonel tubing and trunkline designed to e initiated?" - Answer: ✅✅By a High Strength" detonator. Any other explosive is considered unreliable."
"How do you check that Nonel tubes have been initiated?" - Answer: ✅✅Cut a piece of tubing off blow through it into the palm of your hand, if a silvery powder gets blown out, it has not been initiated. A cut tube can no longer be used.
"While transporting detonators and capped fuse and shock tubes they shall be kept separate from explosives by a partition consisting of what?" - Answer: ✅✅Made of 6 (15cm) thick wood to height of 6" (15cm) above the explosives."
"What risks are present when burning ANFO and ammonium nitrate?" - Answer: ✅✅They may explode the same as NG explosives when heat builds up. They must be guarded as per proper blasting procedures.
"What are dual delay detonators and how do they differ from a Nonel detonator?" - Answer: ✅✅They combine non-electric in-hole and surface initiation in one product. On one end is either an MS or LP delay and on the other is a low strength MS delay initiator.
"Capped safety fuse and Nonels can be safer than electric blasting in which situation?" - Answer: ✅✅When electrical hazards are present.
"When connecting a Nonel detonator to B-Line, you must ensure that:" - Answer: ✅✅"A) The tubing runs in a straight line from B-Line to the hole/collar.
B) the tubing leading to the hole/collar must be at right angles to the B-Line.
C) The B-Line does not touch or cross over any tubes leading to the holes/collar.
""What is a powder headache and how can it be avoided?""" - Answer: ✅✅A headache induced by NG exposure. It can be avoided by minimizing skin contact with NG explosives and by wearing plastic, vinyl, or latex gloves.
"How much explosive may be stored in a workplace storage box?" - Answer: ✅✅A 24 hour supply.
"How close to overhead power lines can a magazine be located?" - Answer: ✅✅It must be further away than the distance located between power poles.
"What are 3 regulations relating to magazines about the protection of explosives from fire?" - Answer: ✅✅"A) Keep flammable material away.
B) No smoking in the vicinity.
C) Clear brush and grass to bare earth.
""in what order should explosives be taken from a magazine?""" - Answer: ✅✅Oldest first.
"Which of the following can be stored with other explosives: - Answer: ✅✅A) electric caps which have the lead wires shunted
B) capped Safety Fuse
C) primacord
D) none of the above" Primacord
"What are the 2 purposes of proper explosive storage?" - Answer: ✅✅"- Safety
""How is the possibility of lighting strikes on magazines reduced?""" - Answer: ✅✅The possibility is reduced by locating a magazine a the base of a high bank or near tall trees. Grounding the magazines is also advisable if the area is subject to severe electrical storms.
"how is a type 6 magazine made theft proof?" - Answer: ✅✅"-weigh at least 200kg when empty
-be internally anchored into solid rock or a concrete slab
-be kept inside a suitable building or fenced area securely locked and controlled by the licensee
"I there a necessity to ensure that explosives are kept fresh?" - Answer: ✅✅Yes, older stock of explosives must be used first as the deteriorate with age.
"How may slurry/watergel explosives be destroyed?" - Answer: ✅✅Due to their water resistance an because some contain insoluble explosive ingredients, they should be destroyed y detonation.
"How may cast boosters be destroyed?" - Answer: ✅✅By detonating them or burning them in quantities less than 50kg as is done for dynamite.
"Who or what agency establishes the standard for Explosive magazines?" - Answer: ✅✅NRC Explosive Branch, or Explosives Act of Canada.
"How often shall a magazine be insoected?" - Answer: ✅✅Weekly
"How must the area in the vicinity of the magazine be maint" - Answer: ✅✅The grounds surrounding the magazine must be maintained free of brush, weeds, dry grass and other combustibles for a distance of at least 8 meters.
"What are the storage capacities for type 6 magazines?" - Answer: ✅✅The maximum storage quantity is 100kg or 500 detonators.
"How is nitroglycerine contamination removed from the floor of a magazine?" - Answer: ✅✅Special cleanser can be obtained from explosives distributors or made by mixing 500g of caustic soda (lye) in 1L of water and adding 6.5L of wood alcohol or methylated spirits.
"At what distance may a type 6 magazine holding detonators be lkocated from a dwellimg, highway, road, etc.?" - Answer: ✅✅A minimum separation of 25m.
"Where may an ordinary safety fuse be stored?" - Answer: ✅✅It is safe to store in any suitable secure and dry building not subject to temperature extremes. It may also be stored in a blasting explosives magazine.
"What records must be kept with regard to explosives in magazines?" - Answer: ✅✅Magazines must have an inventory of magazine contents entered in a log book as per the NRC regulations.
"In an underground mine, what minimum distance between flammable explosives and detonators must be provided before they can be stored?" - Answer: ✅✅8 meters.
"What are two considerations to have when determining a suitable location for a magazine?" - Answer: ✅✅In accordance with the Modified Table for Hazard Divisions 1.1 & 1.5, pg.20 NRC.
"What is the minimum distance required between surface magazines containing detonators and explosives magazines?" - Answer: ✅✅50 meters.
"Where must detonating cord be stored?" - Answer: ✅✅It is stored with explosives.
"Where are detonating connectors (delays) stored?" - Answer: ✅✅They are stored with detonators, and not with detonating cord or other explosives.
"Are Nonel assemblies stored in explosive magazines or detonator magazines and why?" - Answer: ✅✅Nonel assemblies include a detonator containing sensitive primary explosive and therefor must be stored with detonators and not with detonating cord or other explosive material.
"A detonator magazine is used for storing: - Answer: ✅✅A) Capped fuse assemblies
B) Short period electric blasting caps
C) Magnadets
D) Detonating cords
E) XT Nonels" "- capped fuse assemblies
- short period electric blasting caps
- magnadets
- XT Nonels
""Should magazines be locked up and evacuated on the approach of electrical storms?""" - Answer: ✅✅Yes
"Every permitted explosives magazine shall have an accurate record (logbook) that has recorded in it:" - Answer: ✅✅"-Content
- If the electrical blasting circuit is already connected, then all persons shall be withdrawn to a safe distance from the blast site.
- Access to the blast site shall be guarded until the storm passes.
""Describe the correct method of guarding a blast site and describe the clearing, checking, guarding, blasting, and releasing procedures.""" - Answer: ✅✅Ensure the area is evacuated of all persons, guards are posted at all entrances, that an appropriate warning signal is given, and that the blaster conducts a post blast inspection before the all clear signal is given.
"How many fire extinguishers are required by the Chief Inspector of Explosives on bulk trucks, mix trucks, and ANFO blending trucks?" - Answer: ✅✅Three fire extinguishers of at least 10 BC rating, one of which is permanently mounted to discharge directly onto the engine.
"With what must fuel lines be fitted with on bulk trucks, mix trucks, and ANFO blending trucks?" - Answer: ✅✅Fuel line shall be fitted with shutoff valves or a device easily accessible to the operator.
"Must the battery circuit of a bulk truck, mix truck, or ANFO blending truck be disconnected when the vehicle is parked overnight or for prolonged storage?" - Answer: ✅✅Yes, by means of a manual disconnect switch easily accessible to the operator.
"How must the exhaust system for a bulk truck, mix truck, or ANFO blending truck be installed? Give three factors." - Answer: ✅✅"- Extended vertically above the vehicle
- Behind the cab
- Shall be protected with a heat shield from contact with the vehicle box, body, and ingredient hoppers.
""What clear distance must be maintained at the mix site, between the ANFO mix truck operation and other equipment?""" - Answer: ✅✅15 meters.
"Where can a person find the requirements for ANFO blending trucks? Name two sources of this information." - Answer: ✅✅"- Chief Inspector of Explosives, Explosives Energy Branch, Mines and Resources Ottawa
- From the license of your mining company.
""What type of knot is recommended for:" - Answer: ✅✅A) Connecting downlines to trunklines? (detonating cord)
B) Connecting cross ties?" "A) Double half hitch
B) Clove hitch or double wrap half hitch
""What is a ""downline"", a ""branchline"", and a ""trunkline"" in detonating cord blasting?""" - Answer: ✅✅"Downline: the length of the detonating cord in the blasting hole.
Branchline: the detonating cord to which downlines are attached.
Trunkline: the detonating cord to which either or both branchline and downlines are attached.
""How do you attach a plastic detonating connector to detonating cord?""" - Answer: ✅✅Cut the detonating cord and bend the ends into a U" shape. Insert each hoop into either end of the detonating connector and, with the cord touching the inner metal tube, use the tapered plastic wedge to secure it into position."
"Detonating cords can be damaged during loading operations. Describe 5 ways in which this can occur." - Answer: ✅✅"- Scraping on metal and rock surfaces.
- Contact with bulk loading hose.
- Being driven over by a vehicle.
- By shovels used to place stemming.
- Contact with coarse or jagged stemming material.
- Contact with frozen chunks of stemming.
""What length of detonating cord should be used in a blast hole?""" - Answer: ✅✅Allow about 3 feet or more extra length (pigtail) for surface connections and for charge slumping in the hole.
"Why must pigtail (of downline) connections to the trunkline in a single row blasting pattern be kept at 90 degrees or in the general direction of the path of detonation." - Answer: ✅✅To prevent cut-off holes.
"Why are cross-ties used in multiple row patterns using detonator cord?" - Answer: ✅✅To connect the ends of branchline and to provide at least 2 detonation paths.
"May Nonel tubing be used as a lowering line when loading a blast hole?" - Answer: ✅✅No. the weight of the primer will damage or stretch the tubing and cause a failure.
"Name 2 types of blast hole layout patterns." - Answer: ✅✅"- Single row patterns
""What is a branchline in Nonel blasting?""" - Answer: ✅✅In multiple row patterns the Nonel tubing is attached to branchlines which are attached to the trunkline. Branchlines and trunklines are detonating cord.
"What are cross ties and what are their value?" - Answer: ✅✅Cross ties are lengths of detonating cord between branchlines to provide at least two detonation paths. They afford protection against cut-offs from fly rock and ground movement.
"How many cross ties should be provided on a multiple row circuit?" - Answer: ✅✅"- There should be at least 2 paths of initiation
- At intervals not exceeding 30 meters (98')
- At least one cross tie should connect the ends of the branchlines
""How are Nonel assemblies connected to the trunkline?""" - Answer: ✅✅Each length of Nonel tubing is connected separately by means of a special plastic connector for clipping onto a trunkline of detonating cord.
"List 5 good Nonel blasting safety practices:" - Answer: ✅✅"- Avoid abrasion to Nonel tubing from sharp and jagged edges.
- Do not use damaged tubing.
- Do not cut tubes nor attempt to splice them.
- Make proper connections and ensure they are air tight and clean.
-Do not interconnect the assemblies until the last possible moment.
""When loading slurry or emulsion into a hole, what should be done to ensure that the primers are set in the slurry?""" - Answer: ✅✅The primers should be pulled up into the slurry/emulsion after loading and before the slurry/emulsion.
"What are the special precautions to be taken when loading bulk explosives to a fixed collar height?" - Answer: ✅✅The theoretical load should be calculated, and the actual load monitored during loading to ensure that gross overloading does not occur.
"In tying in surface primacord, specify two cases of bad practice which can lead to possible cutoff."
- Answer: ✅✅"- Do not leave a line open-ended. Make sure all lines are looped and each hole is initiated from two directions.
- Do not have sharp corners. Tie across them if possible.
""When loading a hole so wet that slurry or emulsion has to be used, what precautions have to be taken to ensure adequate stemming?""" - Answer: ✅✅Crushed rock should be used. A few minutes after stemming, the hole should be checked and re-stemmed if subsidence has occurred. Drill cuttings, being fine, do not bind together when wet and result in excessive amounts of flyrock.
"the best guard against lightning induced blasting accidents is:" - Answer: ✅✅Through the detection of approaching lightning storms, to stop loading, evacuate the pattern and guard the area as you would during a scheduled blast.
"The person who instructs, directs, or controls workers in the performance of their duties is a:" - Answer: ✅✅Supervisor
"Agent:" - Answer: ✅✅A person having control of a mine on behalf of the owner.
"Management:" - Answer: ✅✅Employees of a mine who act as supervisors.
"Qualified Person:" - Answer: ✅✅An individual who in the opinion of the manager is: a) Qualified because of his knowledge, training, and experience to design, organize, supervise, and perform the duties for which he is appointed. b) Familiar with the provisions of the Mines Act, the regulations, and the code that applies to the duties for which he is appointed. c) Capable of identifying any potential or actual danger to health or safety in the workplace.
"Supervisor:" - Answer: ✅✅An person who instructs, directs, or controls workers in the performance of their duties and who is authorized by the manager to take or recommend disciplinary action against workers.
"Occupational Illness:" - Answer: ✅✅A condition that results from exposure in a workplace to a physical, chemical, or biological agent to the extent that the normal physiological mechanisms are affected causing impairment to the worker.
"Suitable:" - Answer: ✅✅Suitable to the satisfaction of the inspector.
"Who may request a variance to the Code?" - Answer: ✅✅The manager, OHSC, or the local union or a worker representative if there is no union.
"To whom is a request for a variance to the Code submitted to?" - Answer: ✅✅A written request is submitted to the Chief Inspector for a variance of a provision of the Code.
"Who receives copies of a submitted request for a variance to the Code?" - Answer: ✅✅Whichever party submitted the variance (manager, OHSC, or local union) must provide the other two parties with copies of the submission.
"How long do people or groups have to state their concerns of a submitted request for a variance to the Code?" - Answer: ✅✅Within 30 days.
"What must a manager do with an approved variance to the Code?" - Answer: ✅✅Post and maintain an legible copy on bulletin boards.
"A legible copy of each variance from the Code shall be posted in a conspicuously located bulletin board by the:" - Answer: ✅✅Mine Manager
"Who authorizes persons to enter a mine?" - Answer: ✅✅Mine Manager
"How must it be communicated that authorization to enter a mine is required by the manager?" - Answer: ✅✅Notice to this effect shall be posted at all road entrances to the mine.
"Who shall ensure that posters and copies of the Mines Act are provided to every employee and available at suitable locations?" - Answer: ✅✅Mine Manager
"How does the Manager ensure all employees have access to the Act and Code?" - Answer: ✅✅Give each employee one copy free and more copies at cost if required.
"What are the average hours of work per week over the period of any work schedule?" - Answer: ✅✅50 hours.
"What are the maximum allowed hours of work in 24 hours?" - Answer: ✅✅16 Hours.
"What 3 reasons are acceptable for working more than normal hours?" - Answer: ✅✅"- Does not apply to emergencies where life or property is in danger.
- Where urgent work is essential to the continuation of the ordinary working of a mine, providing it is only on an infrequent basis.
- Where workers schedule incorporate periodic shift changes within a 24 hour period.
""Can a mine exploration development work be scheduled to work more than 8 hours?""" - Answer: ✅✅Yes.
"A mine exploration development work can be scheduled to work more than 10 hours. Does this include underground exploration?" - Answer: ✅✅Yes.
"Who can issue a permit to an employee for a preliminary mine exploration or development work for persons to work more than 8 hours in a 24 hour period?" - Answer: ✅✅Chief Inspector of Mines.
"the Occupational Health and Safety Committee is composed of Management and an equal number of worker representatives. Who can choose the worker representative?" - Answer: ✅✅The workers.
"An OHSC is required at every mine where 20 or more workers are regularly employed. When would an OHSC be required at a mine with less than 20 workers regularly employed." - Answer: ✅✅At any other mine when ordered by an inspector.
"Can workers have more members on an OHSC than management?" - Answer: ✅✅Yes.
suffering, the scene of the accident or occurrence is not disturbed without the approval of the Chief Inspector in the event of a fatal accident, the OSC, or an inspector.
"Who investigates accidents causing loss of life or a worker seeking medical aid?" - Answer: ✅✅Persons knowledgeable in the type of work involved, and the co-chairperson of the OHSC or their designates.
"In the event of any accident resulting in loss of life or any dangerous occurrence, within what time shall the Manager notify the inspector, OHSC, and the local union or employee association?"
"Who shall prepare an accident investigation report to be forwarded to the OHSC and an Inspector?" - Answer: ✅✅The Manager
"Any unusual accident or unexpected event which has the potential to result in serious injury must be reported to:" - Answer: ✅✅Inspector of Mines
"Any unusual or unexpected event which has the potential to result in serious injury is called a:" - Answer: ✅✅Dangerous Occurence
"Who is responsible for ensuring that all persons wear personal protective equipment?" - Answer: ✅✅The worker.
"To whom does a person refusing work report the circumstances to?" - Answer: ✅✅The supervisor.
"What steps are required following a refusal to work?" - Answer: ✅✅The supervisor receiving a report under section 1.10.3 shall forthwith investigate the matter and ensure that any hazardous condition is remediated without delay, or if in his opinion the report is invalid, he shall inform the person who made the report.
"Can an alternate worker be used in place of a worker who considers a job hazardous?" - Answer: ✅✅Yes.
"If the manager is required to investigate an unsafe work hazard, is he required to report the circumstances? If so to whom?" - Answer: ✅✅If the worker is suspended or allowed to proceed, submit a report to the OHSC, local union, and an inspector that describes the incident, shows compliance with the Code, and describes any remedial action taken.
"If the procedures to resolve a reported unsafe work hazard have not been resolved by the worker affected, an alternate worker, and the supervisor, who shall conduct a further investigation?" - Answer: ✅✅The Manager.
"What are two qualities of a person that provides guidance on a new job?" - Answer: ✅✅"- competency in both doing the job and in giving instructions.
- ensures that all employees receive thorough orientation and basic instruction in safe work practices.
""How does a manager ensure all employees are suitably skilled in the work they are required to perform?""" - Answer: ✅✅The manager shall maintain a record of all training workers and supervisors have received and make this record available to an inspector upon request.
"Give two possible ways that a manager may exempt a new employee from training programs:" - Answer: ✅✅"- workers are adequately trained to do their job or are working under the guidance of someone who has competency both in the job and in giving instructions.
- Ensure that all employees receive thorough orientation and basic instructions in safe work practices.
""Who can order a supervisor be removed from his supervisory duties?""" - Answer: ✅✅The Inspector of Mines.
"Who issues a Shiftboss, Fireboss, or competency certificate after an applicant demonstrates his knowledge by passing an examination on the sections of the Mines Act and Code?" - Answer: ✅✅Board of Examiners.
"Who may suspend a Shiftboss, Fireboss, or competency certificate?" - Answer: ✅✅An Inspector.
"What are 3 reasons why a certificate of competency could be suspended?" - Answer: ✅✅"- the holder fails to comply with the Act, the regulations, or the Code
- is by reason incompetent or negligent
